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Journal articles on the topic 'Swept-fluid technique'

Author: Grafiati

Published: 4 June 2021

Last updated: 12 February 2022

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1

Wang, Jue, and Dong Li. "Silk-Screen Print Technique in Laminar Flow Control." Advanced Materials Research 317-319 (August 2011): 1433–37. http://dx.doi.org/10.4028/www.scientific.net/amr.317-319.1433.

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Silk-Screen Print Technique was used to print roughness elements at the leading edge of a swept wing for crossflow (CF) dominated Laminar Flow control (LFC) in fluid dynamics. Crossflow was studied to be sensitive to the spacing and height of the roughness elements, as well as the density of the metal ink. Experiments in our research showed silk-screen print technique can precisely print the elements to dominate to delay transition.

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2

Walker, Anthony S., and Kyle E. Niemeyer. "Applying the Swept Rule for Solving Two-Dimensional Partial Differential Equations on Heterogeneous Architectures." Mathematical and Computational Applications 26, no. 3 (2021): 52. http://dx.doi.org/10.3390/mca26030052.

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The partial differential equations describing compressible fluid flows can be notoriously difficult to resolve on a pragmatic scale and often require the use of high-performance computing systems and/or accelerators. However, these systems face scaling issues such as latency, the fixed cost of communicating information between devices in the system. The swept rule is a technique designed to minimize these costs by obtaining a solution to unsteady equations at as many possible spatial locations and times prior to communicating. In this study, we implemented and tested the swept rule for solving

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Liu, Qi Cheng, and Yong Jian Liu. "Study on the Mechanism of Enhancing Oil Recovery by Molecular Film Displacement." Advanced Materials Research 236-238 (May 2011): 2135–41. http://dx.doi.org/10.4028/www.scientific.net/amr.236-238.2135.

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Molecular film displacement is a new nanofilm EOR technique. A large number of experiments show that the mechanism of molecular film displacement is different from conventional chemical displacement (polymer, surfactant, alkali and ASP displacement etc). With water solution acting as transfer medium, molecules of the filming agent develop the force to form films through electrostatic interaction, with efficient molecules deposited on the negatively charged rock surface to form ultrathin films at nanometer scale. This change the properties of reservoir surface and the interaction condition with

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4

Camberos, J. A., R. M. Kolonay, F. E. Eastep, and R. F. Taylor. "An efficient method for predicting zero-lift or boundary-layer drag including aeroelastic effects for the design environment." Aeronautical Journal 119, no. 1221 (2015): 1451–60. http://dx.doi.org/10.1017/s0001924000011349.

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AbstractOne of the aerospace design engineer’s goals aims to reduce drag for increased aircraft performance, in terms of range, endurance, or speed in the various flight regimes. To accomplish this, the designer must have rapid and accurate techniques for computing drag. At subsonic Mach numbers drag is primarily a sum of lift-induced drag and zero-lift drag. While lift-induced drag is easily and efficiently determined by a far field method, using the Trefftz plane analysis, the same cannot be said of zero-lift drag. Zero-lift drag (CD,0) usually requires consideration of the Navier-Stokes equ

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Moioli, Matteo, Christopher Reinbold, Kaare Sørensen, and Christian Breitsamter. "Investigation of Additively Manufactured Wind Tunnel Models with Integrated Pressure Taps for Vortex Flow Analysis." Aerospace 6, no. 10 (2019): 113. http://dx.doi.org/10.3390/aerospace6100113.

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Wind tunnel models are traditionally machined from high-quality metal material; this condition reduces the possibility to test different geometric variations or models as it corresponds to incremental cost. In the last decade, the quality of additive manufacturing techniques has been progressively increasing, while the cost has been decreasing. The utilization of 3D-printing techniques suggests the possibility to improve the cost, time, and flexibility of a wind tunnel model production. Possible disadvantages in terms of quality of the model finishing, stiffness, and geometric accuracy are inv

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6

Shen, Pingping, Jialu Wang, Shiyi Yuan, Taixian Zhong, and Xu Jia. "Study of Enhanced-Oil-Recovery Mechanism of Alkali/Surfactant/Polymer Flooding in Porous Media From Experiments." SPE Journal 14, no. 02 (2009): 237–44. http://dx.doi.org/10.2118/126128-pa.

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Summary The fluid-flow mechanism of enhanced oil recovery (EOR) in porous media by alkali/surfactant/polymer (ASP) flooding is investigated by measuring the production performance, pressure, and saturation distributions through the installed differential-pressure transducers and saturation-measurement probes in a physical model of a vertical heterogeneous reservoir. The fluid-flow variation in the reservoir is one of the main mechanisms of EOR of ASP flooding, and the nonlinear coupling and interaction between pressure and saturation fields results in the fluid-flow variation in the reservoir.

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7

Watanabe, Shingo, Jichao Han, Gill Hetz, Akhil Datta-Gupta, Michael J. King, and D. W. Vasco. "Streamline-Based Time-Lapse-Seismic-Data Integration Incorporating Pressure and Saturation Effects." SPE Journal 22, no. 04 (2017): 1261–79. http://dx.doi.org/10.2118/166395-pa.

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Summary We present an efficient history-matching technique that simultaneously integrates 4D repeat seismic surveys with well-production data. This approach is particularly well-suited for the calibration of the reservoir properties of high-resolution geologic models because the seismic data are areally dense but sparse in time, whereas the production data are finely sampled in time but spatially averaged. The joint history matching is performed by use of streamline-based sensitivities derived from either finite-difference or streamline-based flow simulation. For the most part, earlier approac

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8

Buckley, Marc P., and Fabrice Veron. "Structure of the Airflow above Surface Waves." Journal of Physical Oceanography 46, no. 5 (2016): 1377–97. http://dx.doi.org/10.1175/jpo-d-15-0135.1.

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AbstractIn recent years, much progress has been made to quantify the momentum exchange between the atmosphere and the oceans. The role of surface waves on the airflow dynamics is known to be significant, but our physical understanding remains incomplete. The authors present detailed airflow measurements taken in the laboratory for 17 different wind wave conditions with wave ages [determined by the ratio of the speed of the peak waves Cp to the air friction velocity u* (Cp/u*)] ranging from 1.4 to 66.7. For these experiments, a combined particle image velocimetry (PIV) and laser-induced fluores

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9

Lumley, D. E., and R. A. Behrens. "Practical Issues of 4D Seismic Reservoir Monitoring: What an Engineer Needs to Know." SPE Reservoir Evaluation & Engineering 1, no. 06 (1998): 528–38. http://dx.doi.org/10.2118/53004-pa.

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Summary Time-lapse three-dimensional (3D) seismic, which geophysicists often abbreviate to four-dimensional (4D) seismic, has the ability to image fluid flow in the interwell volume by repeating a series of 3D seismic surveys over time. Four-dimensional seismic shows great potential in reservoir monitoring and management for mapping bypassed oil, monitoring fluid contacts and injection fronts, identifying pressure compartmentalization, and characterizing the fluid-flow properties of faults. However, many practical issues can complicate the simple underlying concept of a 4D project. We address

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10

Coward, Adrian V., and Philip Hall. "The stability of two-phase flow over a swept wing." Journal of Fluid Mechanics 329 (December 25, 1996): 247–73. http://dx.doi.org/10.1017/s0022112096008919.

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We use numerical and asymptotic techniques to study the stability of a two-phase air/water flow above a flat porous plate. This flow is a model of the boundary layer which forms on a yawed cylinder and can be used as a useful approximation to the air flow over swept wings. The air and water form an immiscible interface which can destabilize the flow, leading to travelling wave disturbances which move along the attachment line. This instability occurs for lower Reynolds numbers than is the case in the absence of a water layer. The two-fluid flow can be used as a crude model of the effect of hea

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11

Muszynska, A., and D. E. Bently. "Frequency-swept rotating input perturbation techniques and identification of the fluid force models in rotor/bearing/seal systems and fluid handling machines." Journal of Sound and Vibration 143, no. 1 (1990): 103–24. http://dx.doi.org/10.1016/0022-460x(90)90571-g.

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12

Burrascano, Pietro, and Matteo Ciuffetti. "Noise Reduction in the Swept Sine Identification Procedure of Nonlinear Systems." Applied Sciences 11, no. 16 (2021): 7273. http://dx.doi.org/10.3390/app11167273.

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The Hammerstein model identification technique based on swept sine excitation signals proved in numerous applications to be particularly effective for the definition of a model for nonlinear systems. In this paper we address the problem of the robustness of this model parameter estimation procedure in the presence of noise in the measurement step. The relationship between the different functions that enter the identification procedure is analyzed to assess how the presence of additive noise affects model parameters estimation. This analysis allows us to propose an original technique to mitigat

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13

Huh, Chun, and William R. Rossen. "Approximate Pore-Level Modeling for Apparent Viscosity of Polymer-Enhanced Foam in Porous Media." SPE Journal 13, no. 01 (2008): 17–25. http://dx.doi.org/10.2118/99653-pa.

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Summary Foam is used in the oil industry in a variety of applications, and polymer is sometimes added to increase foam's stability and effectiveness. A variety of surfactant and polymer combinations have been employed to generate polymer-enhanced foam (PEF), typically anionic surfactants and anionic polymers, to reduce their adsorption in reservoir rock. While addition of polymer to bulk foam is known to increase its viscosity and apparent stability, polymer addition to foams for use in porous media has not been as effective. In this pore-level modeling study, we develop an apparent viscosity

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14

Müller, R. H. G., M. Nsi Mba, E. Aymard, D. Favier, E. Berton, and C. Maresca. "Visualization and measurement of helicopter rotor flow with swept back tip shapes at hover flight using the “flow visualization gun” time line technique." Experiments in Fluids 21, no. 3 (1996): 161–69. http://dx.doi.org/10.1007/bf00191687.

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15

Rey, Alvaro, Eric Bhark, Kai Gao, Akhil Datta-Gupta, and Richard Gibson. "Streamline-based integration of time-lapse seismic and production data into petroleum reservoir models." GEOPHYSICS 77, no. 6 (2012): M73—M87. http://dx.doi.org/10.1190/geo2011-0346.1.

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We have developed an efficient approach of petroleum reservoir model calibration that integrates 4D seismic surveys together with well-production data. The approach is particularly well-suited for the calibration of high-resolution reservoir properties (permeability) because the field-scale seismic data are areally dense, whereas the production data are effectively averaged over interwell spacing. The joint calibration procedure is performed using streamline-based sensitivities derived from finite-difference flow simulation. The inverted seismic data (i.e., changes in elastic impedance or flui

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16

Escobar, Freddy Humberto, Angela Patricia Zambrano, Diana Vanessa Giraldo, and José Humberto Cantillo. "Pressure and pressure derivative analysis without type-curve matching for thermal recovery processes." CT&F - Ciencia, Tecnología y Futuro 4, no. 4 (2011): 23–35. http://dx.doi.org/10.29047/01225383.226.

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In recent years, a constant increase of oil prices and declining reserves of coventional crude oils have produced those deposits of lights to be considered economically unattractive to be produced as an alternative way to keep the world´s oil supply volume. Heavy oil deposits are mainly characterized by having high resistance to flow (high viscosity), which makes them diffi-cult to produce. Since oil viscosity is a property that is reduced by increasing the temperature, thermal recovery techniques -such as steam injection or in-situ combustion- have become over the years the main tool fo

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17

Mannhardt, Karin, J. J. Novosad, and L. L. Schramm. "Comparative Evaluation of Foam Stability to Oil." SPE Reservoir Evaluation & Engineering 3, no. 01 (2000): 23–34. http://dx.doi.org/10.2118/60686-pa.

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Summary Foam performance was evaluated by several experimental methods (corefloods, bulk foam stability, micromodel observations, interfacial parameters) using three commercial surfactants, either by themselves or mixed with a fluorinated surfactant. The presence of oil reduced foam mobility reduction factors (Fmr) to different degrees; excellent Fmr were still attained with some surfactants in the presence of residual oil. Using the fluorinated surfactant as additive enhanced the oil tolerance of some, but not all, foams. The tested foams exhibited oil transporting properties. Each foam adjus

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18

Kaya, Mehmet Numan, Faruk Köse, Oğuz Uzol, Derek Ingham, Lin Ma, and Mohamed Pourkashanian. "Aerodynamic Optimization of a Swept Horizontal Axis Wind Turbine Blade." Journal of Energy Resources Technology 143, no. 9 (2021). http://dx.doi.org/10.1115/1.4051469.

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Abstract The aerodynamic shapes of the blades are still of high importance and various aerodynamic designs have been developed in order to increase the amount of energy production. In this study, a swept horizontal axis wind turbine blade has been optimized to increase the aerodynamic efficiency using the computational fluid dynamics method. To illustrate the technique, a wind turbine with a rotor diameter of 0.94 m has been used as the baseline turbine, and the most appropriate swept blade design parameters, namely the sweep start-up section, tip displacement, and mode of the sweep have been

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19

Yadala, Srikar, Marc T. Hehner, Jacopo Serpieri, et al. "Experimental control of swept-wing transition through base-flow modification by plasma actuators." Journal of Fluid Mechanics 844 (April 13, 2018). http://dx.doi.org/10.1017/jfm.2018.268.

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Control of laminar-to-turbulent transition on a swept-wing is achieved by base-flow modification in an experimental framework, up to a chord Reynolds number of 2.5 million. This technique is based on the control strategy used in the numerical simulation by Dörr & Kloker (J. Phys. D: Appl. Phys., vol. 48, 2015b, 285205). A spanwise uniform body force is introduced using dielectric barrier discharge plasma actuators, to either force against or along the local cross-flow component of the boundary layer. The effect of forcing on the stability of the boundary layer is analysed using a simplifie

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20

Corsini, A., F. Rispoli, and T. E. Tezduyar. "Computer Modeling of Wave-Energy Air Turbines With the SUPG/PSPG Formulation and Discontinuity-Capturing Technique." Journal of Applied Mechanics 79, no. 1 (2011). http://dx.doi.org/10.1115/1.4005060.

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We present a computational fluid mechanics technique for modeling of wave-energy air turbines, specifically the Wells turbine. In this type of energy conversion, the wave motion is converted to an oscillating airflow in a duct with the turbine. This is a self-rectifying turbine in the sense that it maintains the same direction of rotation as the airflow changes direction. The blades of the turbine are symmetrical, and here we consider straight and swept blades, both with constant chord. The turbulent flow physics involved in the complex, unsteady flow is governed by nonequilibrium behavior, an

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21

Dhainaut, Marc, Pål Tetlie, and Knut Bech. "Modeling and Experimental Study of a Stirred Tank Reactor." International Journal of Chemical Reactor Engineering 3, no. 1 (2006). http://dx.doi.org/10.2202/1542-6580.1274.

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This study proposes a comparison between CFD (Computational Fluid Dynamics) and experimental results for a cylindrical stirred tank reactor. The stirred tank reactor considered here is 0.7 m high, 0.4 m in diameter, baffled and has four impeller blades on a single shaft, placed at the symmetry axis. The tank is filled with water and serves as a model for molten aluminium purifying reactors.The experimental part of the study compares the use of PIV and LDV techniques to determine the flow field inside the tank. We use PIV to get a complete picture of the flow field in two vertical sections of t

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22

Roh, Miin, Inês Laíns, Hyun Joon Shin, et al. "Microperimetry in age-related macular degeneration: association with macular morphology assessed by optical coherence tomography." British Journal of Ophthalmology, February 1, 2019, bjophthalmol—2018–313316. http://dx.doi.org/10.1136/bjophthalmol-2018-313316.

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Background/aimsMicroperimetry is a technique that is increasingly used to assess visual function in age-related macular degeneration (AMD). In this study, we aimed to evaluate the relationship between retinal sensitivity measured with macular integrity assessment (MAIA) microperimetry and optical coherence tomography (OCT)-based macular morphology in AMD.MethodsProspective, cross-sectional study. All participants were imaged with colour fundus photographs used for AMD staging (Age-Related Eye Disease Study scale), spectral-domain OCT (Spectralis, Heidelberg, Germany) and swept-source OCT (Topc

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23

Akbar, Imran, Zhou Hongtao, Liu Wei, Asadullah Memon, and Ubedullah Ansari. "A Comprehensive Study on Factors Affecting Preformed Particle Gel in Enhanced Oil Recovery." Recent Innovations in Chemical Engineering (Formerly Recent Patents on Chemical Engineering) 13 (August 19, 2020). http://dx.doi.org/10.2174/2405520413999200819153221.

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: The Preformed Particle gels (PPGs) has been widely used and injected in low permeability rich oil zones as di-verting agent to solve the conformance issues, distract displacing fluid into out of sorts swept zones and reduce the perme-ability of thief zones and high permeability fractured zones. However, the PPG propagation and plugging mechanism is still remain unpredictable and sporadic in manifold void space passages. PPGs have two main abilities, first, it increases the sweep efficiency and second, it decreases the water production in mature oilfields. But the success or failure of PPG tr

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24

Braun, Carol-Ann, and Annie Gentes. "Dialogue: A Hyper-Link to Multimedia Content." M/C Journal 7, no. 3 (2004). http://dx.doi.org/10.5204/mcj.2361.

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Background information Sandscript was programmed with the web application « Tchat-scene », created by Carol-Ann Braun and the computer services company Timsoft (). It organizes a data-base of raw material into compositions and sequences allowing to build larger episodes. Multimedia resources are thus attributed to frames surrounding the chat space or to the chat space itself, thus “augmented” to include pre-written texts and graphics. Sandscript works best on a PC, with Internet Explorer. On Mac, use 0S9 and Internet Explorer. You will have to download a chat application for the site to functi

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