Relevant bibliographies by topics / Fluids pressure

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  1. Journal articles
  2. Dissertations / Theses
  3. Books
  4. Book chapters
  5. Conference papers
  6. Reports

Academic literature on the topic 'Fluids pressure'

Author: Grafiati
Published: 9 September 2021
Last updated: 13 February 2022

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Journal articles on the topic "Fluids pressure"

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Erdős, Máté, Olav Galteland, Dick Bedeaux, Signe Kjelstrup, Othonas A. Moultos, and Thijs J. H. Vlugt. "Gibbs Ensemble Monte Carlo Simulation of Fluids in Confinement: Relation between the Differential and Integral Pressures." Nanomaterials 10, no. 2 (February 9, 2020): 293. http://dx.doi.org/10.3390/nano10020293.

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The accurate description of the behavior of fluids in nanoporous materials is of great importance for numerous industrial applications. Recently, a new approach was reported to calculate the pressure of nanoconfined fluids. In this approach, two different pressures are defined to take into account the smallness of the system: the so-called differential and the integral pressures. Here, the effect of several factors contributing to the confinement of fluids in nanopores are investigated using the definitions of the differential and integral pressures. Monte Carlo (MC) simulations are performed in a variation of the Gibbs ensemble to study the effect of the pore geometry, fluid-wall interactions, and differential pressure of the bulk fluid phase. It is shown that the differential and integral pressure are different for small pores and become equal as the pore size increases. The ratio of the driving forces for mass transport in the bulk and in the confined fluid is also studied. It is found that, for small pore sizes (i.e., < 5 σ fluid ), the ratio of the two driving forces considerably deviates from 1.
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Franta, M., J. Málek, and K. R. Rajagopal. "On steady flows of fluids with pressure– and shear–dependent viscosities." Proceedings of the Royal Society A: Mathematical, Physical and Engineering Sciences 461, no. 2055 (March 8, 2005): 651–70. http://dx.doi.org/10.1098/rspa.2004.1360.

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There are many technologically important problems such as elastohydrodynamics which involve the flows of a fluid over a wide range of pressures. While the density of the fluid remains essentially constant during these flows whereby the fluid can be approximated as being incompressible, the viscosity varies significantly by several orders of magnitude. It is also possible that the viscosity of such fluids depends on the shear rate. Here we consider the flows of a class of incompressible fluids with viscosity that depends on the pressure and shear rate. We establish the existence of weak solutions for the steady flows of such fluids subjected to homogeneous Dirichlet boundary conditions and to specific body forces that are not necessarily assumed to be small. A novel aspect of the study is the manner in which we treat the pressure that allows us to establish its compactness, as well as that of the velocity gradient. The method draws upon the physics of the problem, namely that the notion of incompressibility is an idealization that is attained by letting the compressibility of the fluid to tend to zero.
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Skadsem, Hans Joakim, Amare Leulseged, and Eric Cayeux. "Measurement of Drilling Fluid Rheology and Modeling of Thixotropic Behavior." Applied Rheology 29, no. 1 (March 1, 2019): 1–11. http://dx.doi.org/10.1515/arh-2019-0001.

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Abstract Drilling fluids perform a number of important functions during a drilling operation, including that of lifting drilled cuttings to the surface and balancing formation pressures. Drilling fluids are usually designed to be structured fluids exhibiting shear thinning and yield stress behavior, and most drilling fluids also exhibit thixotropy. Accurate modeling of drilling fluid rheology is necessary for predicting friction pressure losses in the wellbore while circulating, the pump pressure needed to resume circulation after a static period, and how the fluid rheology evolves with time while in static or near-static conditions. Although modeling the flow of thixotropic fluids in realistic geometries is still a formidable future challenge to be solved, considerable insights can still be gained by studying the viscometric flows of such fluids. We report a detailed rheological characterization of a water-based drilling fluid and an invert emulsion oilbased drilling fluid. The micro structure responsible for thixotropy is different in these fluids which results in different thixotropic responses. Measurements are primarily focused at transient responses to step changes in shear rate, but cover also steady state flow curves and stress overshoots during start-up of flow. We analyze the shear rate step change measurements using a structural kinetics thixotropy model.
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Batzle, Michael, and Zhijing Wang. "Seismic properties of pore fluids." GEOPHYSICS 57, no. 11 (November 1992): 1396–408. http://dx.doi.org/10.1190/1.1443207.

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Pore fluids strongly influence the seismic properties of rocks. The densities, bulk moduli, velocities, and viscosities of common pore fluids are usually oversimplified in geophysics. We use a combination of thermodynamic relationships, empirical trends, and new and published data to examine the effects of pressure, temperature, and composition on these important seismic properties of hydrocarbon gases and oils and of brines. Estimates of in‐situ conditions and pore fluid composition yield more accurate values of these fluid properties than are typically assumed. Simplified expressions are developed to facilitate the use of realistic fluid properties in rock models. Pore fluids have properties that vary substantially, but systematically, with composition, pressure, and temperature. Gas and oil density and modulus, as well as oil viscosity, increase with molecular weight and pressure, and decrease with temperature. Gas viscosity has a similar behavior, except at higher temperatures and lower pressures, where the viscosity will increase slightly with increasing temperature. Large amounts of gas can go into solution in lighter oils and substantially lower the modulus and viscosity. Brine modulus, density, and viscosities increase with increasing salt content and pressure. Brine is peculiar because the modulus reaches a maximum at a temperature from 40 to 80°C. Far less gas can be absorbed by brines than by light oils. As a result, gas in solution in oils can drive their modulus so far below that of brines that seismic reflection bright spots may develop from the interface between oil saturated and brine saturated rocks.
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KRESS, BRIAN T., and DAVID C. MONTGOMERY. "Pressure determinations for incompressible fluids and magnetofluids." Journal of Plasma Physics 64, no. 4 (October 2000): 371–77. http://dx.doi.org/10.1017/s0022377800008825.

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Certain unresolved ambiguities surround pressure determinations for incompressible flows: both Navier–Stokes and magnetohydrodynamic (MHD). For uniform-density fluids with standard Newtonian viscous terms, taking the divergence of the equation of motion leaves a Poisson equation for the pressure to be solved. But Poisson equations require boundary conditions. For the case of rectangular periodic boundary conditions, pressures determined in this way are unambiguous. But in the presence of ‘no-slip’ rigid walls, the equation of motion can be used to infer both Dirichlet and Neumann boundary conditions on the pressure P, and thus amounts to an over-determination. This has occasionally been recognized as a problem, and numerical treatments of wallbounded shear flows usually have built in some relatively ad hoc dynamical recipe for dealing with it – often one that appears to ‘work’ satisfactorily. Here we consider a class of solenoidal velocity fields that vanish at no-slip walls, have all spatial derivatives, but are simple enough that explicit analytical solutions for P can be given. Satisfying the two boundary conditions separately gives two pressures, a ‘Neumann pressure’ and a ‘Dirichlet pressure’, which differ nontrivially at the initial instant, even before any dynamics are implemented. We compare the two pressures, and find that, in particular, they lead to different volume forces near the walls. This suggests a reconsideration of no-slip boundary conditions, in which the vanishing of the tangential velocity at a no-slip wall is replaced by a local wall-friction term in the equation of motion.
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Wang, Jin Feng, and Jin Gen Deng. "Fuzzy Ball Drilling Fluid for CBM in the Ordos Basin of China." Advanced Materials Research 651 (January 2013): 717–21. http://dx.doi.org/10.4028/www.scientific.net/amr.651.717.

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Fuzzy ball drilling fluids have been developed in order to effectively control lost circulation during CBM drilling. Depending upon fuzzy balls and colloids in fuzzy balls, the fuzzy ball drilling fluids changed their shapes and properties to completely plug underground heterogeneous seepage channels so as to strengthen the pressure bearing capacity of formations. This paper describes the available features of the fuzzy ball drilling fluid including efficient plugging, good carrying and suspension, formation damage control, compatible weighted by any weighted materials without auxiliary equipment. The fuzzy ball drilling fluids can finish drilling in low pressure natural gas zone, control CBM leakage; control the natural fractures, drilling in different pressures in the same open hole, combination with the air drilling mode, etc. during Ordos CBM drilling. The fuzzy ball drilling fluid will not affect down-hole motors and MWD. The fuzzy ball drilling fluid will be blend simply as conventional water based drilling fluids. The existing CBM drilling equipment can completely meet the fuzzy ball drilling mixing and it is maintained conveniently. The fuzzy ball drilling fluid is the efficient drilling fluid.
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Li, Zuo Chen, Zhi Heng Zhang, Liang Zhan, and Jia Rong Cai. "Fuzzy Ball Drilling Fluids for CBM in the Ordos Basin of China." Advanced Materials Research 602-604 (December 2012): 843–46. http://dx.doi.org/10.4028/www.scientific.net/amr.602-604.843.

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Fuzzy ball drilling fluids have been developed in order to effectively control lost circulation during CBM drilling. Depending upon fuzzy balls and colloids in fuzzy balls, the fuzzy ball drilling fluids changed their shapes and properties to completely plug underground heterogeneous seepage channels so as to strengthen the pressure bearing capacity of formations. This paper describes the available features of the fuzzy ball drilling fluid including efficient plugging, good carrying and suspension, formation damage control, compatible weighted by any weighted materials without auxiliary equipment. The fuzzy ball drilling fluids can finish drilling in low pressure natural gas zone, control CBM leakage; control the natural fractures, drilling in different pressures in the same open hole, combination with the air drilling mode, etc. during Ordos CBM drilling. The fuzzy ball drilling fluid will not affect down-hole motors and MWD. The fuzzy ball drilling fluid will be blend simply as conventional water based drilling fluids. The existing CBM drilling equipment can completely meet the fuzzy ball drilling mixing and it is maintained conveniently. The fuzzy ball drilling fluid is the efficient drilling fluid.
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Escobar, Freddy-Humberto, Angela-Patricia Zambrano, Diana-Vanessa Giraldo, and José-Humberto Cantillo. "Pressure and pressure derivative analysis for non-newtonian pseudoplastic fluids in double-porosity formations." CT&F - Ciencia, Tecnología y Futuro 4, no. 3 (May 24, 2011): 47–60. http://dx.doi.org/10.29047/01225383.238.

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Non-Newtonian fluids are often used during various drilling, workover and enhanced oil recovery processes. Most of the fracturing fluids injected into reservoir-bearing formations possess non-Newtonian nature and these fluids are often approximated by Newtonian fluid flow models. In the field of well testing, several analytical and numerical models taking into account Bingham, pseudoplastic and dilatant non-Newtonian behavior have been introduced in the literature to study their transient nature in porous media for a better reservoir characterization. Most of them deal with fracture wells and homogeneous formations and well test interpretation is conducted via the straight-line conventional analysis or type-curve matching. Only a few studies consider the pressure derivative analysis. However, there exists a need of a more practical and accurate way of characterizing such systems. So far, it does not exist any methodology to characterize heterogeneous formation bearing non-Newtonian fluids through of well test analysis. In this study, an interpretation methodology using the pressure and pressure derivative log-log plot is presented for non-Newtonian fluids in naturally fractured formations, so the dimensionless fracture storativity ratio, ω, and interporosity flow parameter, λ, are obtained from characteristics points found on such plot. The developed equations and correlations are successfully verified by their application only to synthetic well test data since no actual field data are available. A good match is found between the results provided by the proposed technique and the values used to generate the simulated data.
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Bushmin, S. A., Ye A. Vapnik, M. V. Ivanov, Yu M. Lebedeva, and E. V. Savva. "Fluids in High-Pressure Granulites." Petrology 28, no. 1 (January 2020): 17–46. http://dx.doi.org/10.1134/s0869591120010026.

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Todd, B. D., Denis J. Evans, and Peter J. Daivis. "Pressure tensor for inhomogeneous fluids." Physical Review E 52, no. 2 (August 1, 1995): 1627–38. http://dx.doi.org/10.1103/physreve.52.1627.

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Dissertations / Theses on the topic "Fluids pressure"

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Anderås, Emil. "Advanced MEMS Pressure Sensors Operating in Fluids." Doctoral thesis, Uppsala universitet, Fasta tillståndets elektronik, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-173182.

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Today’s MEMS technology allows manufacturing of miniaturized, low power sensors that sometimes exceeds the performance of conventional sensors. The pressure sensor market today is dominated by MEMS pressure sensors. In this thesis two different pressure sensor techniques are studied. The first concerns ways to improve the sensitivity in the most commonly occurring pressure sensor, namely such based on the piezoresistive technique. Since the giant piezoresistive effect was observed in silicon nanowires, it was assumed that a similar effect could be expected in nano-thin silicon films. However, it turned out that the conductivity was extremely sensitive to substrate bias and could therefore be controlled by varying the backside potential. Another important parameter was the resistivity time drift. Long time measurements showed a drastic variation in the resistance. Not even after several hours of measurement was steady state reached. The drift is explained by hole injection into the buried oxide as well as existence of mobile charges. The piezoresistive effect was studied and shown to be of the same magnitude as in bulk silicon. Later research has shown the existence of such an effect where the film thickness has to be less than around 20 nm.  The second area that has been studied is the pressure sensitivity of in acoustic resonators. Aluminium nitride thin film plate acoustic resonators (FPAR) operating at the lowest-order symmetric (S0), the first-order asymmetric (A1) as well as the first-order symmetric (S1) Lamb modes have been theoretically and experimentally studied in a comparative manner. The S0 Lamb mode is identified as the most pressure sensitive FPAR mode. The theoretical predictions were found to be in good agreement with the experiments. Additionally, the Lamb modes have been tested for their sensitivities to mass loading and their ability to operate in liquids, where the S0 mode showed good results. Finally, the pressure sensitivity in aluminium nitride thin film bulk wave resonators employing c- and tilted c-axis texture has been studied. The c-axis tilted FBAR demonstrates a substantially higher pressure sensitivity compared to its c-axis oriented counterpart.
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Suleiman, Norhidayah. "High pressure phase equilibria applications involving supercritical fluids." Thesis, University of Nottingham, 2016. http://eprints.nottingham.ac.uk/35580/.

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This thesis describes the investigation of phase behaviour of binary and ternary mixtures at high pressure. The particular applications chosen to be explored in this phase behaviour investigation were supercritical fluid electrodeposition (SCFED) and carbon capture and storage (CCS). Chapter 1 introduces the phase behaviour of mixtures. Chapter 2 describes the equipment and analytical techniques used throughout this thesis including the high-pressure variable-volume view cell, electrical conductivity cell, high pressure FTIR cell, and high-pressure optical fiber phase analyser. Chapter 3 details the solubility and conductivity investigation of several supporting electrolytes in difluoromethane (CH2F2), which provided an electrochemical bath with sufficient conductivity for electrodeposition in supercritical fluids. The most effective supporting electrolyte amongst the eight ionic compounds tested was [N(nC4H9)4][Al(OC(CF3)3)4] which was found to give a moderate solubility and the highest conductivity (222 Scm2mol-1) in CH2F2. [N(nC4H9)4][Al(OC(CF3)3)4] was followed by [N(nC4H9)4][FAP] and [N(nCH3)4][FAP], , making all of them to be satisfactory potential supporting electrolytes for SCFED. Chapter 4 describes the investigation of water solubility in CO2/N2 mixtures relevant to the CCS process. The scope of the investigation covers a wide pressure range and two levels of N2 (xN2= 0.05 and xN2= 0.10). This experimental study was conducted by using the FTIR technique as described in further detail in Chapter 2. It was found that the presence of N2 in CO2 lowered the solubility of H2O in supercritical CO2 with N2 compared to pure CO2. The solubility of water also decreases significantly when the concentration of N2 is increased from 5% to 10%. Chapter 5 further explores the role of phase behaviour in the application of CCS with the investigation of the phase envelope of the ternary mixtures of CO2 and permanent gases (Ar, N2, and H2). Three ternary mixtures were measured (90% CO2 + 5% N2 + 5% Ar, 98% CO2 + 1% N2 + 1% Ar, and 95% CO2 + 3% H2 + 2% Ar) by using the fiber optic reflectometer, as described in further detail in Chapter 2. The experimental data presented in this part also have been used to validate the equation of state for the CCS applications. It was found that the phase envelope of CO2 shifted to a higher pressure and the two-phase region become broader with the presence of permanent gases. Overall, both GERG-2004 and gSAFT provide a good agreement between the predicted and experimental data for all the ternary mixtures investigated, with the exception of the bubble-point line for the 3%H2 + 2%Ar + 95% CO2 mixture. Finally, Chapter 6 summarises the research that was conducted in this thesis. It also evaluates the progress made towards achieving the aims initially set-up in Chapter 1.
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Palmer, Sheila Carmody. "Dual-pressure absorption cycles : the second law and working fluids." Diss., Georgia Institute of Technology, 1994. http://hdl.handle.net/1853/18389.

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Laghaei, Rozita. "Calculation of phase equilibria of quantum fluids at high pressure." [S.l. : s.n.], 2003. http://deposit.ddb.de/cgi-bin/dokserv?idn=968311326.

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Verma, Prashant K. "Experimental and theoretical determination of nonlinear pressure fields in biological fluids." Thesis, University of Bath, 1995. https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.760667.

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Yuen, David J. (David Joseph). "Measurement of high frequency dielectric constant and conductivity of fluids and fluid-saturated rocks at high pressure." Thesis, Massachusetts Institute of Technology, 1990. http://hdl.handle.net/1721.1/84199.

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Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1990.
Title as it appears in the M.I.T. Graduate List, June 1990: High-frequency dielectric constant and conductivity of fluids and fluid-saturated rocks at high pressure.
Includes bibliographical references (leaves 124-127).
by David J. Yuen.
M.S.
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Ntamba, Ntamba Butteur Mulumba. "Non-Newtonian pressure loss and discharge coefficients for short square-edged orifices plates." Thesis, Cape Peninsula University of Technology, 2011. http://hdl.handle.net/20.500.11838/1252.

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Thesis (MTech (Mechanical Engineering))--Cape Peninsula University of Technology, 2011.
Despite the extensive research work carried out on flow through short square-edged orifice plates over the last century (e.g. Johansen, 1930; Benedict, 1977; Alvi et al., 1978; Swamee, 2005; ESDU, 2007), gaps in the engineering data still exist for certain ranges of flow conditions and geometries. The majority of data available in the literature are for Newtonian fluids in the turbulent flow regime (ESDU, 2007). Insufficient data have been observed for the orifice with pipe diameter ratio, β = 0.2, in the laminar flow regime. There are no experimental data for β = 0.3 and 0.57. The objective of this thesis was to conduct wide-ranging experimental studies of the flow in orifice plates, which included those geometrical configurations, by measuring pressure loss coefficients and discharge coefficients across the orifice plates using both Newtonian fluids and non-Newtonian fluids in both laminar and turbulent flow regimes. The test work was conducted on the valve test rig at the Cape Peninsula University of Technology. Four classical circular short square-edged orifice plates having, β = 0.2, 0.3, 0.57 and 0.7, were tested. In addition, two generation 0 Von Koch orifice plates (Von Koch, 1904), with equivalent cross sectional area were also tested for β = 0.57. Water was used as Newtonian fluid to obtain turbulent regime data and also for calibration purposes to ensure measurement accuracy and carboxymethyl cellulose, bentonite and kaolin slurries were used at different concentrations to obtain laminar and transitional loss coefficient data. The hydraulic grade line method was used to evaluate pressure loss coefficients (Edwards et al., 1985), while the flange tap arrangement method was used to determine the discharge coefficients (ESDU, 2007). A tube viscometer with three different pipe diameters was used to obtain the rheological properties of the fluids. The results for each test are presented in the form of pressure loss coefficient (kor) and discharge coefficient (Cd) against pipe Reynolds number (Re)
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Schaeffer, Steven T. "Extraction and isolation of monocrotaline from Crotalaria spectabilis using supercritical fluids." Diss., Georgia Institute of Technology, 1988. http://hdl.handle.net/1853/10234.

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Bohra, Lalit Kumar. "Flow and Pressure Drop of Highly Viscous Fluids in Small Aperture Orifices." Thesis, Georgia Institute of Technology, 2004. http://hdl.handle.net/1853/7269.

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A study of the pressure drop characteristics of the flow of highly viscous fluids through small diameter orifices was conducted to obtain a better understanding of hydraulic fluid flow loops in vehicles. Pressure drops were measured for each of nine orifices, including orifices of nominal diameter 0.5, 1 and 3 mm, and three thicknesses (nominally 1, 2 and 3 mm), and over a wide range of flow rates (2.86x10sup-7/sup Q 3.33x10sup-4/sup msup3/sup/s). The fluid under consideration exhibits steep dependence of the properties (changes of several orders of magnitude) as a function of temperature and pressure, and is also non-Newtonian at the lower temperatures. The data were non-dimensionalized to obtain Euler numbers and Reynolds numbers using non-Newtonian treatment. It was found that at small values of Reynolds numbers, an increase in aspect ratio (length/diameter ratio of the orifice) causes an increase in Euler number. It was also found that at extremely low Reynolds numbers, the Euler number was very strongly influenced by the Reynolds number, while the dependence becomes weaker as the Reynolds number increases toward the turbulent regime, and the Euler number tends to assume a constant value determined by the aspect ratio and the diameter ratio. A two-region (based on Reynolds number) model was developed to predict Euler number as a function of diameter ratio, aspect ratio, viscosity ratio and generalized Reynolds number. This model also includes data at higher temperatures (20 and le; T and le; 50supo/supC) obtained by Mincks (2002). It was shown that for such highly viscous fluids with non-Newtonian behavior at some conditions, accounting for the shear rate through the generalized Reynolds number resulted in a considerable improvement in the predictive capabilities of the model. Over the laminar, transition and turbulent regions, the model predicts 86% of the data within and plusmn25% for 0.32 l/d (orifice thickness/diameter ratio) 5.72, 0.023 and beta; (orifice/pipe diameter ratio) 0.137, 0.09 Resubge/sub 9677, and 0.0194 and mu;subge/sub 9.589 (kg/m-s)
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Namuq, Mohammed Ali. "Simulation and modeling of pressure pulse propagation in fluids inside drill strings." Doctoral thesis, Technische Universitaet Bergakademie Freiberg Universitaetsbibliothek "Georgius Agricola", 2013. http://nbn-resolving.de/urn:nbn:de:bsz:105-qucosa-107969.

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Modern bottom-hole assemblies are equipped with various sensors which measure the geological and directional information of the borehole while drilling. It is very crucial to get the measured downhole information to the surface in real time in order to be able to monitor, steer and optimize the drilling process while drilling. The transmission of the information to the surface is most commonly carried out by coded pressure pulses (the technology called mud pulse telemetry) which propagate through the drilling mud inside the drill string towards the surface. However, hardly any specific experimental research on the hydraulic data transmission can be found in the literature. Moreover, it is essential to use a reliable model/simulation tool which can more accurately simulate the pressure pulse propagation in fluids inside drill strings under various drilling operation conditions in order to improve the performance of the data transmission process. The aims of this study are to develop and test a laboratory experimental setup, a simulation model and a novel method for detecting and decoding of measurement while drilling pressure pulse propagation in fluids inside drill strings. This thesis presents a laboratory experimental setup for investigating the process of data transmission in boreholes by mud pulse telemetry. The test facility includes a flow loop, a centrifugal pump, a positive mud pulser or alternatively a mud siren, pressure transducers at four different locations along the flow loop and a data collection system. Moreover, it includes an “actuator system” for the simulation of typical noise patterns created by the common duplex or triplex mud pumps. This laboratory setup with great capabilities opens the way for testing and developing new concepts for data transmission. A theoretical model using ANSYS CFX11 (Computational Fluid Dynamics (CFD) commercial code) was successfully developed to simulate dynamic pressure pulse transmission behavior in the fluid inside the flow loop. The collected laboratory data which simulate various data transmission processes in boreholes were used to verify and calibrate the theoretical method. A pretty good agreement is achieved between the predicted and measured pressure pulses at different locations along the flow loop for positive pulses with various durations using different flow rates and for continuous pressure pulses using different carrier frequencies. A novel approach (continuous wavelet transformation) for detecting and decoding the received continuous pressure pulses in a noisy environment was applied to various simulated drilling operation conditions for data transmission in boreholes in the laboratory. The concept was registered at the German Patent and Trade Mark Office (DPMA) for a patent in 2011. The results indicate that the continuous wavelet transformation can be used to clearly identify and better detect the continuous pressure pulse periods, frequencies and discontinuity positions in the time domain compared to the conventional method (Fourier transformation). This method will contribute to the possibility of transmitting the data at higher rates and over longer distances. A concept for developing an innovative pulser using electrical discharge or acoustic sources for inducing pulses keeping the drill strings fully open (eliminating the problem of plugging the pulser by pumped lost circulation materials) and without any mechanical moving parts (eliminating the failure related to the pulser moving parts) was also registered at the German Patent and Trade Mark Office (DPMA) for a patent in 2012. With this pulser, it is expected that it would be possible to transmit the data over longer distances and at higher rates. Realizing the concept of the new pulser and using continuous wavelet transformation for detecting and decoding the pulser signal are recommended for future work.
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Books on the topic "Fluids pressure"

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Bodnár, Tomáš, Giovanni P. Galdi, and Šárka Nečasová, eds. Fluids Under Pressure. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-39639-8.

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Abdulagatov, I. M., A. I. Abdulagatov, and Gennadiĭ Vladimirovich Stepanov. Isochoric heat capacity of fluids and fluid mixtures in the critical and supercritical regions: Experiment and theory. Hauppauge, N.Y: Nova Science Publishers, 2011.

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Arce, Pedro F. Fluid phase behavior of systems involving high molecular weight compounds and supercritical fluids. Hauppauge, N.Y: Nova Science Publishers, 2009.

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P, Ryan Michael. The viscosity of synthetic and natural silicate melts and glasses at high temperatures and 1 bar (10⁵ Pascals) pressure and at higher pressures. Washington, DC: U.S. Dept. of the Interior, 1987.

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P, Ryan Michael. The viscosity of synthetic and natural silicate melts and glasses at high temperatures and 1 bar (10⁵ Pascals) pressure and at higher pressures. [Washington]: U.S. G.P.O., 1987.

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Bos, Bart. Faults, fluids and friction: Effect of pressure solution and phyllosilicates on fault slip behaviour, with implications for crustal rheology. [Utrecht]: Faculteit Aardwetenschappen der Universiteit Utrecht, 2000.

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Husain, Zoeb. Basic fluid mechanics and hydraulic machines. Hyderabad [India]: BS Publications, 2008.

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S, Kabir C., ed. Pressure transient analysis. Englewood Cliffs, N.J: Prentice Hall, 1990.

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Design and use of pressure sewer systems. Chelsea, Mich: Lewis Publishers, 1987.

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Antonov, A. N. Pulʹsat͡s︡ii davlenii͡a︡ pri struĭnykh i otryvnykh techenii͡a︡kh. Moskva: Mashinostroenie, 1990.

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Book chapters on the topic "Fluids pressure"

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Hieber, Matthias, and Amru Hussein. "An Approach to the Primitive Equations for Oceanic and Atmospheric Dynamics by Evolution Equations." In Fluids Under Pressure, 1–109. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-39639-8_1.

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Bresch, Didier, and Pierre-Emmanuel Jabin. "Viscous Compressible Flows Under Pressure." In Fluids Under Pressure, 111–56. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-39639-8_2.

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Shibata, Yoshihiro, and Hirokazu Saito. "Global Well-Posedness for Incompressible–Incompressible Two-Phase Problem." In Fluids Under Pressure, 157–347. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-39639-8_3.

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Neustupa, Jiří. "The Role of Pressure in the Theory of Weak Solutions to the Navier-Stokes Equations." In Fluids Under Pressure, 349–416. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-39639-8_4.

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Bulíček, Miroslav. "Flows of Fluids with Pressure Dependent Material Coefficients." In Fluids Under Pressure, 417–81. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-39639-8_5.

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John, Volker, Petr Knobloch, and Ulrich Wilbrandt. "Finite Element Pressure Stabilizations for Incompressible Flow Problems." In Fluids Under Pressure, 483–573. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-39639-8_6.

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Perić, Milovan. "Finite-Volume Methods for Navier-Stokes Equations." In Fluids Under Pressure, 575–638. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-39639-8_7.

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Ross, Marvin. "Physics of Dense Fluids." In High Pressure Chemistry and Biochemistry, 9–49. Dordrecht: Springer Netherlands, 1987. http://dx.doi.org/10.1007/978-94-009-3827-4_2.

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Andrews, J. C., and D. Strelioff. "Intralabyrinthine pressure transmission of intracranial pressure in the normal guinea pig." In Intracranial and Intralabyrinthine Fluids, 85–92. Berlin, Heidelberg: Springer Berlin Heidelberg, 1996. http://dx.doi.org/10.1007/978-3-642-80163-1_11.

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Rzoska, Sylwester J., and Aleksandra Drozd Rzoska. "New Proposals for Supercritical Fluids Applications." In Metastable Systems under Pressure, 167–79. Dordrecht: Springer Netherlands, 2010. http://dx.doi.org/10.1007/978-90-481-3408-3_12.

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Conference papers on the topic "Fluids pressure"

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Watanabe, Toshiaki, Hirofumi Iyama, Hironori Maehara, and Shigeru Itoh. "Basic Study on Promotion of Evaporating Cryogenic Fluids by Direct Contacting Normal Temperature Fluids." In ASME 2009 Pressure Vessels and Piping Conference. ASMEDC, 2009. http://dx.doi.org/10.1115/pvp2009-77564.

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The mixture of the extreme low temperature fluid and the normal temperature fluid becomes the cause which causes pressure vessel and piping system crush due to explosive boiling and rapid freezing. In recent years in Japan, the demand of cryogenic fluids like a LH2, LNG is increasing because of the advance of fuel cell device technology, hydrogen of engine, and stream of consciousness for environmental agreement. On the other hand, as for fisheries as well, the use of a source of energy that environment load is small has been being a pressing need. Therefore, we carried out the experiments related to promotion of evaporating cryogenic fluids, in the contact directly of the water and liquid nitrogen.
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Gale, Janez, and Iztok Tiselj. "Modeling of Pressure Undershoot and Heat and Mass Transfer at Negative Pressures." In ASME 2005 Fluids Engineering Division Summer Meeting. ASMEDC, 2005. http://dx.doi.org/10.1115/fedsm2005-77146.

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This paper addresses preliminary study of the behavior of the cold liquid exposed to the significant rapid pressure changes, performed with recently developed Waha computer code. The goal of the study is to develop semi-empirical model, able to describe heat and mass transfer in cold liquids exposed to negative pressure loads. Negative pressure in liquid can appear after sudden depressurization and the amount of pressure undershoot encountered is highly correlated to density of the nucleation sites i.e. properties defined at molecular level. Therefore, raw model is proposed and discussed and the conclusion is that the results are in particularly good agreement comparing to the uncertainty of the phenomenon itself.
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Pierre, Benjamin, and Jon Steinar Gudmundsson. "Pumping of Fluids Using Pressure Impulses." In EUROPEC/EAGE Conference and Exhibition. Society of Petroleum Engineers, 2009. http://dx.doi.org/10.2118/120896-ms.

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Oliveira, G. M., A. T. Franco, C. O. R. Negrão, R. B. Vadinal, B. S. Lomba, T. U. Fonseca, and A. L. Martins. "Pressure Transmission in Gelled Drilling Fluids." In SPE/IADC Drilling Conference and Exhibition. Society of Petroleum Engineers, 2015. http://dx.doi.org/10.2118/173128-ms.

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Watanabe, Toshiaki, Hironori Maehara, and Shigeru Itoh. "Basic Study on Pressure Vessel for Vaporization of Cryogenic Fluids by Direct Contacting Normal Temperature Fluids." In ASME 2012 Pressure Vessels and Piping Conference. American Society of Mechanical Engineers, 2012. http://dx.doi.org/10.1115/pvp2012-78192.

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In recent years in Japan, the demand of cryogenic fluids like a LH2, LNG is increasing because of the advance of fuel cell device technology, hydrogen of engine, and stream of consciousness for environmental agreement. On the other hand, as for fisheries as well, the use of a source of energy that environment load is small has been being a pressing need. We paid attention to the effective use of cold heat of the liquid fuel which is a cryogenic fluid. That method is to use a cold heat which an cryogenic fluid has, without a heat exchanger. The mixture of the extreme low temperature fluid and the normal temperature fluid becomes the cause which causes pressure vessel and piping system crush due to explosive boiling and rapid freezing. Therefore, we carried out the experiments related to promotion of evaporating cryogenic fluids, in the contact directly of the room temperature fluids and cryogenic fluids.
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Watanabe, Toshiaki, Hirofumi Iyama, Hironori Maehara, and Shigeru Itoh. "Basic Study on Explosive Evaporation of Cryogenic Fluids by Contacting Normal Temperature Fluids in the Pressure Vessel." In ASME 2011 Pressure Vessels and Piping Conference. ASMEDC, 2011. http://dx.doi.org/10.1115/pvp2011-57420.

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The mixture of the extreme low temperature fluid and the normal temperature fluid becomes the cause which causes pressure vessel and piping system crush due to explosive boiling and rapid freezing. In recent years in Japan, the demand of cryogenic fluids like a LH2, LNG is increasing because of the advance of fuel cell device technology, hydrogen of engine, and stream of consciousness for environmental agreement. On the other hand, as for fisheries as well, the use of a source of energy that environment load is small has been being a pressing need. Therefore, we carried out the experiments related to promotion of evaporating cryogenic fluids, in the contact directly of the water and liquid nitrogen.
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Hagiya, Isao, Katsutoshi Kobayashi, Yoshimasa Chiba, Tetsuya Yoshida, and Akira Arai. "Analysis of Static Characteristics of Pressure Seal in Actual High Pressure Pump." In ASME-JSME-KSME 2011 Joint Fluids Engineering Conference. ASMEDC, 2011. http://dx.doi.org/10.1115/ajk2011-06081.

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We predicted the leakage flow rates of a pressure seal in an actual high-pressure multistage pump. Since the pressure of the actual pump is higher than that of a model pump, accurate prediction of leakage flow rate and rotor dynamic forces for an actual pump is more difficult than that for a model pump. A non-contacting seal is used as a pressure seal to suppress leakage flow for high-pressure multistage pumps. When such pumps are operated at high speed, the fluid force acting on an eccentric rotor may cause vibration instability. For vibration stability analysis, we need to estimate static and dynamic characteristics of the pressure seals, i.e., leakage flow rate and rotor dynamic coefficients. We calculated the characteristics of the pressure seal based on Iwatsubo group’s method. The pressure seal we developed has labyrinth geometry consisting of grooves with different sizes. This method numerically calculates the characteristics of the grooved seal by using a three-control-volume model and a perturbation method. We compared the calculated and measured leakage flow rates. We found that the calculated results quantitatively agreed with the measured one in the actual pump and the characteristics of pressure and velocity for the seal with non-uniform-sized grooves were clarified.
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Suresh, Krishnamurty, Yves Dagba, and Amita Tripathi. "Tubular Structure Deformation Under the Thermal Loads of Two Fluids." In ASME 2002 Pressure Vessels and Piping Conference. ASMEDC, 2002. http://dx.doi.org/10.1115/pvp2002-1579.

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The fluid/structure/thermal interaction as performed in the commercial code fluidyn-CHT consists of coupling the finite volume approach for fluids to the finite element method for structures inside the same solver. Meshes for the two media are independent and boundary conditions are exchanged iteratively until convergence. Thus, the complex response of combined fluid and solid media is solved efficiently. As a typical industrial test case, a thick steel pipe presenting a 90° elbow is modelled. Initially the fluid in the pipe is at a temperature of 423 K and at 157 bar of pressure. At the inlet, two streams enter the pipe at 423 K and 523 K respectively. The fluids start to mix after the elbow. As a consequence, the thermal load exerted on the structure result in a deformation of the structure at the elbow. This deformation could end up in a catastrophic failure.
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Ibrahim, Raouf A. "Overview of Vibro-Impact Dynamics of Pipes Conveying Fluids and the Problem of Fluid-Elastic Instability." In ASME 2009 Pressure Vessels and Piping Conference. ASMEDC, 2009. http://dx.doi.org/10.1115/pvp2009-77057.

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This paper presents an overview of vibro-impact dynamics of pipes conveying fluid and the fluid-elastic instability under conditions of turbulence and nonlinearities in nuclear power plants. Different types of modeling, dynamic analysis and stability regimes of pipes conveying fluid restrained by elastic or inelastic barriers are described. The main results reported in the literature will be discussed. The sources of discrepancies in the results will be identified. The main source is primarily the inaccuracy of analytical modeling of the pipe dynamics and impact interaction. The occurrence of flow-induced vibration fretting wear in process equipment such as heat exchangers and steam generators accounts for the majority of failures due to vibration. The fretting wear problem will be first described. This is followed by discussing the computational algorithms used to predict some aspects of vibro-impact dynamics such as the fluid-elastic instability of a tube array by cross flow. Fretting wear prediction requires nonlinear computations of the tube dynamics in which proper modeling of the fluid forcing function plays an important role. Some experimental results pertaining to the vibro-impact motion due to tube-support gaps are discussed with an emphasis on the remote identification of impact forces.
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Saasen, Arild, Jan David Ytrehus, and Bjørnar Lund. "Annular Frictional Pressure Losses for Drilling Fluids." In ASME 2020 39th International Conference on Ocean, Offshore and Arctic Engineering. American Society of Mechanical Engineers, 2020. http://dx.doi.org/10.1115/omae2020-18709.

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Abstract The most common viscosity models used in the drilling industry are the Bingham, the Power-Law and the Herschel-Bulkley models. In addition, it is common to refer to the low-shear yield-point. The scope of the present paper is to discuss numerical methods applicable for calculating annular frictional pressure losses. The topic of annular frictional pressure loss modelling has been treated in textbooks. None of these couple their models with the selection of viscosity data from measurements at the relevant shear rates. It is earlier shown how rotation of the inner string in an annulus can complicate the flow due to establishment of Taylor vortices. There are currently no analytical methods to handle such flow. The effect of the vortices depends strongly on the fluid’s composition in addition to the flow conditions. The practical way to handle these situations are by “fingerprinting” during circulation. In the paper examples will be presented showing how the Herschel-Bulkley fluid can be transferred to simple models for axial flow in an annulus where the inner cylinder does not rotate. It is common to use the narrow slot approximation. This method was used by Founargiotakis et al. In this paper both the modified Herschel-Bulkley model with dimensionless shear rates and the traditional model where the consistency depends on the shear rate will be presented. The dimensionless shear rate model can easily be translated back to the traditional form and vice-versa. Mathematical models will be presented. Hence a framework is given that is easier to use for digitalization and automation and in correlations including pressure, temperature and composition.
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Reports on the topic "Fluids pressure"

1

Etters, R. D. Properties of molecular solids and fluids at high pressure and temperatures. Office of Scientific and Technical Information (OSTI), March 1992. http://dx.doi.org/10.2172/5732309.

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Jonas, Jiri. Fluids, Gels and Glasses under Extreme Conditions of Pressure and Temperature. Fort Belvoir, VA: Defense Technical Information Center, January 1988. http://dx.doi.org/10.21236/ada190655.

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Etters, R. D. Properties of molecular solids and fluids at high pressure and temperatures. Progress report, July 1, 1989--July 1, 1992. Office of Scientific and Technical Information (OSTI), March 1992. http://dx.doi.org/10.2172/10130994.

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Etters, R. D. Properties of molecular solids and fluids at high pressure and temperature. Final report, March 1, 1986--October 31, 1993. Office of Scientific and Technical Information (OSTI), June 1994. http://dx.doi.org/10.2172/10177355.

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Cabrera, Carlos R., and Allen J. Bard. Electrochemistry in Near-Critical and Supercritical Fluids. 8. Methyl Viologen, Decamethylferrocene, Os(bpy)3(2+) and Ferrocene in Acetonitrile and the Effect of Pressure on Diffusion Coefficients under Supercritical Conditions. Fort Belvoir, VA: Defense Technical Information Center, July 1989. http://dx.doi.org/10.21236/ada213407.

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Kerber, Stephen, and William D. Walton. Characterizing positive pressure ventilation using computational fluid dynamics. Gaithersburg, MD: National Institute of Standards and Technology, 2003. http://dx.doi.org/10.6028/nist.ir.7065.

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Pruess, Karsten. Role of Fluid Pressure in the Production Behavior of EnhancedGeothermal Systems with CO2 as Working Fluid. Office of Scientific and Technical Information (OSTI), April 2007. http://dx.doi.org/10.2172/928785.

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Meirovitch, Leonard, and Surot Thangjitham. Active Control of Sound Pressure Radiated in Fluid from a Vibrating Structure. Fort Belvoir, VA: Defense Technical Information Center, February 1993. http://dx.doi.org/10.21236/ada261905.

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Chi, G. Fluid compositions and temperature-pressure conditions of intrusion-related gold systems in southwestern New Brunswick - a fluid-inclusion study. Natural Resources Canada/ESS/Scientific and Technical Publishing Services, 2002. http://dx.doi.org/10.4095/213694.

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Chi, G., B. Dubé, and K. Williamson. Preliminary fluid-inclusion microthermometry study of fluid evolution and temperature-pressure conditions in the Goldcorp High-Grade zone, Red Lake mine, Ontario. Natural Resources Canada/ESS/Scientific and Technical Publishing Services, 2002. http://dx.doi.org/10.4095/213205.

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