Relevant bibliographies by topics / Film flow analysis

Contents

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

Academic literature on the topic 'Film flow analysis'

Author: Grafiati
Published: 4 June 2021
Last updated: 4 February 2022

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Journal articles on the topic "Film flow analysis"

1

Peng, X. F., and G. P. Peterson. "Analysis of Rewetting for Surface Tension Induced Flow." Journal of Heat Transfer 114, no. 3 (1992): 703–7. http://dx.doi.org/10.1115/1.2911337.

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An analytical investigation was conducted to determine the rewetting characteristics of thin, surface tension driven liquid films over heated plates as a function of the fluid properties, the film thickness, and the applied heat flux. Analytical expressions for the maximum sustainable heat flux and the rewetting velocity were developed for both flat and grooved plates and were compared with data from previous investigations. The results indicated good agreement for low film velocities; however, at high velocities the experimental data deviated significantly from the theoretical predictions. It was hypothesized that this deviation was due to the presence of liquid sputtering near the liquid front. To compensate for this liquid sputtering, the expressions for maximum sustainable heat flux and rewetting velocity were modified using an empirical correction factor developed from the data of previous thin film thickness investigations. The resulting modified expressions were found to compare very favorably with available experimental data over a large range of flow conditions and velocities.
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Hagen, Thomas. "Advances in fiber and film flow." Nonlinear Analysis: Theory, Methods & Applications 63, no. 5-7 (2005): e1119-e1130. http://dx.doi.org/10.1016/j.na.2004.12.011.

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Kim, Joon Hyun, and Joo-Hyun Kim. "Thermohydrodynamic Analysis of Surface Roughness in the Flow Field." Journal of Tribology 127, no. 2 (2005): 293–301. http://dx.doi.org/10.1115/1.1828072.

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The study deals with the development of a thermohydrodynamic (THD) computational procedure for evaluating the pressure, temperature, and velocity distributions in fluid films with a very rough geometry. A parametric investigation is performed to predict the bearing behaviors in the lubricating film with the absorbed layers and their interfaces as determined by rough surfaces with Gaussian distribution. The layers are expressed as functions of the standard deviations of each surface to characterize flow patterns between both rough surfaces. Velocity variations and heat generation are assumed to occur in the central (shear) zone with the same bearing length and width. The coupled effect of the surface roughness and shear zone dependency on the hydrodynamic pressure and temperature has been found in the noncontact mode. The procedure confirms the numerically determined relationship between the pressure and film gap, provided that its roughness magnitude is smaller than the fluid film thickness.
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Ito, Hisahiro, Masao Doi, Takeharu Isaki, Masaaki Takeo, and Kazuo Yagi. "2D Flow Analysis of Film Casting Process." Nihon Reoroji Gakkaishi 31, no. 3 (2003): 149–55. http://dx.doi.org/10.1678/rheology.31.149.

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Wang, Yingjia, Minshan Liu, Dongchen Qin, and Zhenwei Yan. "Performance of high-speed hydrodynamic sliding bearings with lubricating oils combining laminar and turbulent flows." Advances in Mechanical Engineering 12, no. 6 (2020): 168781402093338. http://dx.doi.org/10.1177/1687814020933389.

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High-speed hydrodynamic sliding bearings use lubricating oil that can have laminar and turbulent flow states, yet turbulent states remain relatively unstudied. This study combines theoretical analysis, numerical modeling, and experiments to analyze lubrication fluids in such bearings. It considers Reynolds equations, energy equations, and temperature-viscosity relationships under laminar and turbulent flows. The governing equations are solved by the finite difference method. Two-dimensional distributions of Reynolds number, pressure, and temperature in the bearing film, as well as the lubrication characteristics like bearing capacity and frictional force under working conditions, are analyzed. Single and mixed flow states are compared, which demonstrates the coexistence states of laminar and turbulent flows in an oil film under specific working conditions. Oil film flow distributions differ significantly according to rotational speed and eccentric conditions. Flow changes under high eccentricity are complex. The characteristics of oil films in a single flow state deviate significantly from those in mixed flow. Changes in flow state and heat should not be ignored during analysis of the lubrication performance of high-speed bearings.
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Usha, R., and B. Uma. "Weakly Nonlinear Stability Analysis of Condensate/Evaporating Power-Law Liquid Film Down an Inclined Plane." Journal of Applied Mechanics 70, no. 6 (2003): 915–23. http://dx.doi.org/10.1115/1.1631592.

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Weakly nonlinear stability analysis of thin power-law liquid film flowing down an inclined plane including the phase change effects at the interface has been investigated. A normal mode approach and the method of multiple scales are employed to carry out the linear stability solution and the nonlinear stability solution for the film flow system. The results show that both the supercritical stability and subcritical instability are possible for condensate, evaporating and isothermal power-law liquid film down an inclined plane. The stability characteristics of the power-law liquid film show that isothermal and evaporating films are unstable for any value of power-law index ‘n’ while there exists a critical value of power-law index ‘n’ for the case of condensate film above which condensate film flow system is always stable. Thus, the results of the present analysis show that the mass transfer effects play a significant role in modifying the stability characteristics of the non-Newtonian power-law fluid flow system. The condensate (evaporating) power-law fluid film is more stable (unstable) than the isothermal power-law fluid film flowing down an inclined plane.
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Cheng, P. J., K. C. Liu, and D. T. W. Lin. "Hydromagnetic Stability Analysis of a Film Coating Flow Down a Rotating Vertical Cylinder." Journal of Mechanics 27, no. 1 (2011): 27–36. http://dx.doi.org/10.1017/jmech.2011.4.

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ABSTRACTThe influence of both the Rossby number and the Hartmann number on the hydromagnetic stability of a thin liquid film flowing down along the surface of a vertical cylinder is investigated. The long-wave perturbation method is employed to solve for generalized nonlinear kinematic equations with a free film interface. The normal mode approach is used to compute the stability solution for the film flow. The modeling results indicate that the stability of the liquid film is enhanced by increasing the strength of the magnetic field or reducing the speed at which the cylinder rotates. By contrast, the flow becomes relatively more unstable as the cylinder radius is increased at larger values of the Rossby number. Notably, this finding is the opposite of that observed for film flows along a stationary vertical cylinder.
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Pacheco, J. Rafael, and Arturo Pacheco-Vega. "Analysis of Thin Film Flows Using a Flux Vector Splitting1." Journal of Fluids Engineering 125, no. 2 (2003): 365–74. http://dx.doi.org/10.1115/1.1538626.

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We propose a flux vector splitting (FVS) for the solution of film flows radially spreading on a flat surface created by an impinging jet using the shallow-water approximation. The governing equations along with the boundary conditions are transformed from the physical to the computational domain and solved in a rectangular grid. A first-order upwind finite difference scheme is used at the point of the shock while a second-order upwind differentiation is applied elsewhere. Higher-order spatial accuracy is achieved by introducing a MUSCL approach. Three thin film flow problems (1) one-dimensional dam break problem, (2) radial flow without jump, and (3) radial flow with jump, are investigated with emphasis in the prediction of hydraulic jumps. Results demonstrate that the method is useful and accurate in solving the shallow water equations for several flow conditions.
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Akhtaruzzaman, Md, Md Shahiduzzaman, Nowshad Amin, et al. "Impact of Ar Flow Rates on Micro-Structural Properties of WS2 Thin Film by RF Magnetron Sputtering." Nanomaterials 11, no. 7 (2021): 1635. http://dx.doi.org/10.3390/nano11071635.

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Tungsten disulfide (WS2) thin films were deposited on soda-lime glass (SLG) substrates using radio frequency (RF) magnetron sputtering at different Ar flow rates (3 to 7 sccm). The effect of Ar flow rates on the structural, morphology, and electrical properties of the WS2 thin films was investigated thoroughly. Structural analysis exhibited that all the as-grown films showed the highest peak at (101) plane corresponds to rhombohedral phase. The crystalline size of the film ranged from 11.2 to 35.6 nm, while dislocation density ranged from 7.8 × 1014 to 26.29 × 1015 lines/m2. All these findings indicate that as-grown WS2 films are induced with various degrees of defects, which were visible in the FESEM images. FESEM images also identified the distorted crystallographic structure for all the films except the film deposited at 5 sccm of Ar gas flow rate. EDX analysis found that all the films were having a sulfur deficit and suggested that WS2 thin film bears edge defects in its structure. Further, electrical analysis confirms that tailoring of structural defects in WS2 thin film can be possible by the varying Ar gas flow rates. All these findings articulate that Ar gas flow rate is one of the important process parameters in RF magnetron sputtering that could affect the morphology, electrical properties, and structural properties of WS2 thin film. Finally, the simulation study validates the experimental results and encourages the use of WS2 as a buffer layer of CdTe-based solar cells.
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Henrichsen, L. K., and A. J. McHugh. "Analysis of Film Blowing with Flow-enhanced Crystallization." International Polymer Processing 22, no. 2 (2007): 179–89. http://dx.doi.org/10.3139/217.1003.

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Dissertations / Theses on the topic "Film flow analysis"

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Kumar, Shreyas. "Simulations of Surfactant Driven Thin Film Flow." Scholarship @ Claremont, 2013. http://scholarship.claremont.edu/hmc_theses/63.

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This thesis is intended to fulfill the requirements of the Math and Physics departments at Harvey Mudd College. We begin with a brief introduction to the study of surfactant dynamics followed by some background on the experimental framework our work is related to. We then go through a derivation of the model we use, and explore in depth the nature of the Equation of State (EoS), the relationship between the surface tension on a fluid and the surfactant concentration. We consider the effect of using an empirical equation of state on the results of the simulations and compare the new results against the results produced using a multilayer (EoS) as well as experimental observations. We find that the empirical EoS leads to two new behaviors - preserving of large gradients of surfactant concentration and the occurrence of dynamics in distinct regimes. These behaviors suggest that the empirical EoS improves the agreement of the model’s prediction with experiment.
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Severtson, Yuan C. "Stability analysis of thin film coating systems." Diss., Georgia Institute of Technology, 1996. http://hdl.handle.net/1853/17965.

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Häcker, Tobias. "Modeling, simulation, and nonlinear analysis for film flow over inclined wavy bottoms." Aachen Shaker, 2010. http://d-nb.info/1001048482/04.

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Williams, Joanne. "Thin film rimming flow subject to droplet impact at the surface." Thesis, University of Nottingham, 2009. http://eprints.nottingham.ac.uk/10670/.

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A bearing chamber may be modelled as a horizontal cylinder, stationary or rotating about its axis, with a film of fluid coating the inside of the cylinder wall. The impact of droplets from a two-phase flow in the core of the chamber drives the motion of the oil film. In this thesis we develop a model for the film based on conservation of mass and momentum across the interface between the film and the core, droplet-laden flow. We derive a fourth-order partial differential equation for the film thickness which can be applied to a range of droplet parameters. Solution of this equation is primarily numerical, but approximating it by a cubic also provides useful analytical results. The equation for film thickness contains terms omitted by previous models of the bearing chamber. In particular, we show that terms due to the azimuthal component of droplet motion have a significant effect on film profiles, as they tend to destabilise shock solutions. A dominance of surface tension over the azimuthal droplet momentum is critical for stable steady shock solutions to exist. We consider the effect of the droplet impact being non-uniform about the cylinder, and the positioning of a sink to remove the mass added to the film by the droplets. We will also examine the underlying flow in the film, with particular note of recirculation regions and the residence time of the fluid in the chamber. These factors may be key to the effectiveness of the fluid as a coolant. We also show that Marangoni stresses on the film surface, one of the effects of heating the cylinder, can be modelled using the same film equation and also has a destabilizing effect.
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Häcker, Tobias [Verfasser]. "Modeling, simulation, and nonlinear analysis for film flow over inclined wavy bottoms / Tobias Häcker." Aachen : Shaker, 2010. http://d-nb.info/112436403X/34.

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Atasi, Omer. "Dynamics of bubbles in microchannels : theoretical, numerical and experimental analysis." Doctoral thesis, Universite Libre de Bruxelles, 2018. https://dipot.ulb.ac.be/dspace/bitstream/2013/277838/3/TOC.pdf.

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This thesis aims at contributing to the characterization of the dynamics of bubbles in microfluidics through modeling and experiments. Two flow regimes encountered in microfluidics are studied, namely, the bubbly flow regime and the Taylor flow regime (or slug flow).In particular, the first part of this thesis focuses on the dynamics of a bubbly flow inside a horizontal, cylindrical microchannel in the presence of surfactants using numerical simulations. A numerical method allowing to simulate the transport of surfactants along a moving and deforming interface and the Marangoni stresses created by an in-homogeneous distribution of these surfactants on this interface is implemented in the Level set module of the research code. The simulations performed with this code regarding the dynamics of a bubbly flow give insights into the complexity of the coupling of the different phenomena controlling the dynamics of the studied system. Fo example it shows that the confinement imposed by the microchannel walls results in a significantly different distribution of surfactants on the bubble surface, when compared to a bubble rising in a liquid of infinite extent. Indeed, surfactants accumulate on specific locations on the bubble surface, and create local Marangoni stresses, that drastically influence the dynamics of the bubble. In some cases, the presence of surfactants can even cause the bubble to burst, a mechanism that is rationalized through a normal stress balance at the back of the bubble. The numerical method implemented in this thesis is also used for a practical problem, regarding the artisanal production of Mezcal, an alcoholic beverage from Mexico.The second part of the thesis deals with the dynamics of a Taylor flow regime, through experiments and analytical modeling. An experimental technique that allows to measure the thickness of the lubrication film forming between a pancake-like bubble and the microchannel wall is developed. The method requires only a single instantaneous bright-field image of a pancake-like bubble translating inside a microchannel. In addition to measuring the thickness of the lubrication film, the method also allows to measure the depth of a microchannel. Using the proposed method together with the measurment of the bubble velocity allows to infer the surface tension of the interface between the liquid and the gaz. In the last chapter of this thesis, the effect of buoyancy on the dynamics of a Taylor flow is quantified. Though often neglected in microfluidics, it is shown that buoyancy effects can have a significant impact on the thickness of the lubrication film and consequently on the dynamics of the Taylor flow. These effects are quantified using experiments and analytical modeling. This work was performed at Princeton University with Professor Howard A. Stone during an eight month stay.<br>Doctorat en Sciences de l'ingénieur et technologie<br>info:eu-repo/semantics/nonPublished
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Ali, Ahmad A. "Analysis of heat and mass transfer between air and falling film desiccant for different flow configurations in the presense [i.e. presence] of ultrafine particles." The Ohio State University, 2003. http://rave.ohiolink.edu/etdc/view?acc_num=osu1060028115.

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Zook, Julie Brand. "The flow of city life: An analysis of cinematography and urban form in New York and Los Angeles." Diss., Georgia Institute of Technology, 2016. http://hdl.handle.net/1853/54927.

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This dissertation uses quantitative data on city cinematography and the morphological study of filming locations to identify how differences in ways of seeing cities, as shaped by cinematographic choices, are anchored both in differences in what is physically present as well as in differences in frameworks and expectations about what might be interesting or important to see. Four films are evaluated that are set in Los Angeles and New York, two cities recognized as paradigms in American urbanism: The Naked City (1948), The Long Goodbye (1970), Goodfellas (1990), and Pulp Fiction (1994). In general, the New York movies suggest the embeddedness of the individual in the city and its social life in ways tied closely to urban form, with the visual presentation of the street acting as an index to the position of the individual within the narrative. Los Angeles, by contrast, presents the city as a series of enclaves linked by infrastructure. The street as a sociologically relevant entity hardly exists, with the exception of a handful of chase scenes, as though only crisis can catalyze direct encounters with the streets of Los Angeles. Within individual movies, the depiction of city form reveals directorial idioms in the presentation of the narrative. The Naked City exploits corner shots to impart greater visual interest to the presentation of activity in the streets. The Long Goodbye shows the degradation of the distinction between public and private space as concurrent with a city form and culture that resists decoding. Goodfellas develops a grammar of views on the street that corresponds to the relationships of individual characters to overlapping social groups over time. Pulp Fiction mainly presents city locations as decontextualized to focus on dialogue and relationships, to sculpt urban form to meet the exigencies of the narrative, and to all the more powerfully introduce surprise. In the concluding chapter, the qualities of the city as presented in Goodfellas and Pulp Fiction and both of the cities are diagrammed and discussed relative to architectural precedents and ideas that might inform architectural design.
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Adamsson, Carl. "Dryout and Power Distribution Effects in Boiling Water Reactors." Doctoral thesis, KTH, Reaktorteknologi, 2009. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-11343.

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Film flow measurements at several axial positions in round pipes with variousaxial power distributions are presented for conditions corresponding to normaloperation of a BWR. It is confirmed that the film flow rate approaches zero atthe onset of dryout. Selected phenomenological models of annular two-phaseflow are shown to reasonably reproduce the measurements. It is concluded thatmodels are in better agreement with measurements if terms corresponding topossible boiling induced entrainment are excluded. A method to perform film flow analysis in subchannels as a post-processto a standard two-field subchannel code is suggested. It is shown that thisapproach may yield accurate prediction of dryout power in rod bundles to alow computational cost and that the influence of the power distribution is wellpredicted by the model.<br>QC 20100618
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Subramanian, Kumar. "Analysis of homogeneous film flows on inclined surfaces and on corrugated sheet of packing using CFD." Doctoral thesis, Technische Universitaet Bergakademie Freiberg Universitaetsbibliothek "Georgius Agricola", 2015. http://nbn-resolving.de/urn:nbn:de:bsz:105-qucosa-164588.

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The key to success in separation of liquid mixtures is the efficient creation and utilization of vapour-liquid contact area. By packing the column with gas-liquid contact devices such as structured packing, the vapour-liquid contact area can be increased. However, the efficiency of these packed columns depends strongly on the local flow behaviour of the liquid and vapour phase inside the packing. The aim of this work was to develop three-dimensional CFD models to study the hydrodynamic behaviour on the corrugated sheets of packing. Different approaches are possible to simplify the problem and to extend it for more complex flow scenarios. In this work, three-dimensional CFD simulations were performed to study the complete fluid-dynamic behaviour. This was performed in two steps. As a first step, the developed model was validated with experimental studies using a simplified geometry i.e., an inclined plate. The three-dimensional Volume-of-Fluid (VOF) model was utilized to study the flow behaviour of the gas-liquid countercurrent flow. The influence of the liquid surface tension was taken into consideration using the Continuum Surface Force (CSF) model. The wetting characteristics of liquids with different viscosity (1 and 5 mPas) and contact angle (70° and 7°) were studied for different flow rates. Three different mixtures (water, water-glycerol (45 wt. %) and silicon-oil (DC5)) were considered. Initially, the rivulet width of experiments and simulations were compared and an error of 5 % maximum was determined. The results were also in good agreement with earlier studies. The percentage of wetting due to changes in flow rate, viscosity and contact angle was compared and discussed. For all tested systems, excellent agreement between the experiments and simulation studies was found. In addition, profiles of the velocity in the film at film flow conditions over a smooth inclined plate obtained from simulations were compared with experimental profiles obtained using a μPIV technique. A detailed sensitivity study was also performed in order to understand the changes in the velocity profiles due to small change in liquid flow rate, temperature and inclination angle. As a next step, the developed model was extended to geometries resembling real corrugated sheets of packing used in industrial applications. In earlier numerical studies of structured packing, geometries were simplified to enable easy meshing and faster computation. In this work, the geometries of corrugated sheets of packing were developed without any simplification and the flow behaviour was studied using the model validated in the first step. The flow behaviour on sheets with different geometrical modifications such as smooth and triangular crimp surfaces as well as perforations on the sheets were numerically studied and quantitatively compared with experimental studies for the three different fluid test systems. The agreement between the simulations and experiments was within an acceptable range for all system. The difference in the interfacial area between the corrugated sheets of a packing with and without perforation was analyzed and the prediction ability of different empirical correlations for the interfacial area available in literature was also compared and discussed. Furthermore, the numerical study was extended to understand the influence of the second corrugated sheet. Studying the flow behaviour between two sheets experimentally is very challenging, especially inside opaque packing. The model proved to be a very suitable tool to study the hold-up of the liquid between two sheets, the change in wetting behaviour due to small change in liquid inlet position. The results are also in good agreement with the earlier experimental studies, where researchers measured the liquid hold-up mainly in the region where two corrugated sheets touch each other. The three-dimensional CFD model was validated to study the flow behaviour on corrugated sheets of packing. The results from the simulations agree very well with findings from the experimental studies in terms of wetting and hold-up.
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Books on the topic "Film flow analysis"

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Heidmann, James D. Coarse grid modeling of turbine film cooling flows using volumetric source terms. National Aeronautics and Space Administration, Glenn Research Center, 2001.

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Groundwater discharge tests: Simulation and analysis. Elsevier, 1988.

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Thiros, Susan A. Chemical composition of ground water, hydrologic properties of basin-fill material, and ground-water movement in Salt Lake Valley, Utah. Utah, Dept. of Natural Resources, Division of Water Rights, 1995.

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Shang, De-Yi. Free Convection Film Flows and Heat Transfer: Laminar free Convection of Phase Flows and Models for Heat-Transfer Analysis. 2nd ed. Springer Berlin Heidelberg, 2012.

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Hammond, Ernest C. A densitometric analysis of IIa0 film flown aboard the space shuttle transportation system STS-3, STS-8, & STS-7: Semi-annual report. National Aeronautics and Space Administration, 1986.

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Hammond, Ernest C. The calibration of photographic and spectroscopic films: A densitometric analysis of IIa0 film flown aboard the space shuttle transportation system STS 3, STS 8, & STS 7 : semi-annual report, May 1, 1987 - October 30, 1987. The Laboratory, 1987.

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United States. National Aeronautics and Space Administration., ed. Thermohydrodynamic analysis of cryogenic liquid turbulent flow fluid film bearings. Texas A & M University, Mechanical Engineering Dept, 1993.

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United States. National Aeronautics and Space Administration., ed. Thermohydrodynamic analysis of cryogenic liquid turbulent flow fluid film bearings. Texas A & M University, Mechanical Engineering Dept, 1993.

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D, Vijayaraghavan, United States. National Aeronautics and Space Administration., and U.S. Army Research Laboratory., eds. Film temperatures in the presence of cavitation. National Aeronautics and Space Administration, 1995.

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D, Vijayaraghavan, United States. National Aeronautics and Space Administration., and U.S. Army Research Laboratory., eds. Film temperatures in the presence of cavitation. National Aeronautics and Space Administration, 1995.

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Book chapters on the topic "Film flow analysis"

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Medic, Gorazd, and Paul Durbin. "RANS Simulations for Film-Cooling Analysis and Design." In Modelling Fluid Flow. Springer Berlin Heidelberg, 2004. http://dx.doi.org/10.1007/978-3-662-08797-8_15.

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Vlachopoulos, J., and V. Sidiropoulos. "Die Flow Analysis and Mathematical Modeling of Film Blowing." In Film Processing Advances. Carl Hanser Verlag GmbH & Co. KG, 2014. http://dx.doi.org/10.3139/9781569905364.004.

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Hedgcock, M. W., T. S. Levitt, and V. M. Shadle. "Data Flow Analysis for Transition from Film to Electronic Management." In Computer Assisted Radiology / Computergestützte Radiologie. Springer Berlin Heidelberg, 1993. http://dx.doi.org/10.1007/978-3-642-49351-5_13.

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Zieren, M., R. Willnauer, and J. M. Köhler. "Flow-Through Chip Calorimeter Based on Bisb/Sb-Thin-Film Thermopiles with a Thermopower of 64 mV/K." In Micro Total Analysis Systems 2000. Springer Netherlands, 2000. http://dx.doi.org/10.1007/978-94-017-2264-3_15.

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Kirby, Brian J., Aaron R. Wheeler, Timothy J. Shepodd, Julia A. Fruetel, Ernest F. Hasselbrink, and Richard N. Zare. "A Laser-Polymerized Thin Film Silica Surface Modification for Suppression of Cell Adhesion and Electroosmotic Flow in Microchannels." In Micro Total Analysis Systems 2001. Springer Netherlands, 2001. http://dx.doi.org/10.1007/978-94-010-1015-3_265.

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Sushila and Y. S. Shishodia. "A Novel Approach for Thin Film Flow Problem Via Homotopy Analysis Sumudu Transform Method." In Advances in Intelligent Systems and Computing. Springer India, 2014. http://dx.doi.org/10.1007/978-81-322-1602-5_32.

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Sani, M., H. Behera, and S. Ghosh. "Stability Analysis of a Film Flow Down an Incline in the Presence of a Floating Flexible Membrane." In Mathematical Modelling and Scientific Computing with Applications. Springer Singapore, 2020. http://dx.doi.org/10.1007/978-981-15-1338-1_19.

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Smith, Marc K. "Asymptotic Methods for the Mathematical Analysis of Coating Flows." In Liquid Film Coating. Springer Netherlands, 1997. http://dx.doi.org/10.1007/978-94-011-5342-3_8.

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Berchenko, Yakir, Or Daliot, and Nir N. Brueller. "Intra-Firm Information Flow: A Content-Structure Perspective." In Advances in Intelligent Data Analysis X. Springer Berlin Heidelberg, 2011. http://dx.doi.org/10.1007/978-3-642-24800-9_6.

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Shang, Deyi. "A New Similarity Analysis Method for Laminar Forced Convection Boundary Layer." In Theory of Heat Transfer with Forced Convection Film Flows. Springer Berlin Heidelberg, 2010. http://dx.doi.org/10.1007/978-3-642-12581-2_4.

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Conference papers on the topic "Film flow analysis"

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MUÑOZ-COBO, JOSÉ LUIS, SUSANA M. IGLESIAS, DANY S. DOMINGUEZ, ALBERTO ESCRIVÁ, and CÉSAR BERNA. "ANALYTICAL MODEL AND NUMERICAL STABILITY ANALYSIS FOR FALLING LIQUID FILM REGIMES IN VERTICAL PIPES." In MULTIPHASE FLOW 2019. WIT Press, 2019. http://dx.doi.org/10.2495/mpf190091.

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Luchi, Riccardo, Simone Salvadori, and Francesco Martelli. "Heat Transfer Prediction of Film Cooling in Supersonic Flow." In NUMERICAL ANALYSIS AND APPLIED MATHEMATICS: International Conference on Numerical Analysis and Applied Mathematics 2008. American Institute of Physics, 2008. http://dx.doi.org/10.1063/1.2991037.

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Ruan, Binglu, Huan Li, and Qiuwang Wang. "Theoretical Analysis on Film Thickness of Intertube Falling-Film Flow With a Countercurrent Gas Flow." In ASME 2011 International Mechanical Engineering Congress and Exposition. ASMEDC, 2011. http://dx.doi.org/10.1115/imece2011-64425.

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In falling–film type of heat exchangers, gas/vapor usually exists, and its effect on falling-film mode transitions and heat transfer could not be neglected. It could impact the film thickness, which is an important parameter to determine the thin-film heat transfer performance, or even destroy falling-film modes and significantly deteriorate the heat transfer. However, there have been very few studies of countercurrent gas flow effects on the film thickness. In this paper, the falling-film film thickness with and without liquid-gas interfacial shear stress due to the countercurrent gas flow was studied. A two-phase empirical correlation is used to solve the momentum equation. Calculation results were compared with available experimental data in literatures for validation. Reasonable agreement was achieved. Thus, the two-phase correlation for predicting shear stress of a thin film flow inside a vertical rectangular channel has been extended to a new type of flow. Effects of film Reynolds number, gas velocity, and gas-channel equivalent hydraulic diameter on the film thickness were studied. It is shown that the countercurrent gas flow thickened the falling film. The increased film thickness can shift the mode transitional Reynolds number and reduce the heat transfer coefficient, corroborating the conjecture in our earlier work.
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Hirooka, Nobuyuki, and Elon J. Terrell. "Squeeze Film Flow Analysis Using Moving Particle Semi-Implicit Calculation." In ASME/STLE 2012 International Joint Tribology Conference. American Society of Mechanical Engineers, 2012. http://dx.doi.org/10.1115/ijtc2012-61161.

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We have presented an application of the modified Moving Particle Semi-implicit (MPS) method for squeeze film flows. In addition to calculating the flow field of a squeeze film using the full Navier-Stokes equations, this method has the advantage of being meshless, which gives it the capability of analyzing dynamic and/or highly transient squeeze films by discretizing the domain as a series of particles and numerically analyzing inter-particle interactions. Although past literature has indicated the MPS method in its original form to be unstable in terms of its calculation of pressure, a modified algorithm was implemented to provide agreement between the numerical results and the analytical solutions.
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Kim, Sung In, and Ibrahim Hassan. "Unsteady Heat Transfer Analysis of a Film Cooling Flow." In 46th AIAA Aerospace Sciences Meeting and Exhibit. American Institute of Aeronautics and Astronautics, 2008. http://dx.doi.org/10.2514/6.2008-1287.

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Tkaczyk, P. M., H. P. Morvan, Theodore E. Simos, George Psihoyios, and Ch Tsitouras. "Film Thickness Prediction in an Annular Two-Phase Flow Through Bends." In ICNAAM 2010: International Conference of Numerical Analysis and Applied Mathematics 2010. AIP, 2010. http://dx.doi.org/10.1063/1.3498296.

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Marinca, Vasile, and Nicolae Herişanua. "An optimal homotopy perturbation approach to thin film flow of a fourth grade fluid." In NUMERICAL ANALYSIS AND APPLIED MATHEMATICS ICNAAM 2012: International Conference of Numerical Analysis and Applied Mathematics. AIP, 2012. http://dx.doi.org/10.1063/1.4756674.

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Symons, Digby D., and Arnaud F. M. Bizard. "Measurement of Film Thickness for Continuous Fluid Flow Within a Spinning Cone." In ASME 2014 12th Biennial Conference on Engineering Systems Design and Analysis. American Society of Mechanical Engineers, 2014. http://dx.doi.org/10.1115/esda2014-20129.

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This paper reports experimental measurements of film thickness for continuous fluid flow within a spinning cone. The results are compared to analytical theory for thin film flow and found to be in good agreement. Spinning cones are used in various industrial process machines, including spinning cone distillation columns, centrifugal film evaporators and continuous centrifugal filters. In each case a fluid is fed continuously into the centre of a conical vessel which spins about a vertical axis with the cone apex pointing downwards. The fluid acquires the angular velocity of the cone and migrates up the internal wall of the cone under centrifugal force. Knowledge of the film thickness and flow velocity is often important in order to understand other performance parameters of the process such as evaporation or filtration rates. This paper aims to aid the design of new process machines by providing a mathematical model for film thickness that is validated by experimental results. Experiments have been conducted in which the angle of cone, angular velocity and input flow rate were all varied. Film thickness measurements were obtained via a novel optical method based on photographing the displacement of a projected grid on the surface of the flow within the cone. The method has the advantages of not disturbing the flow in any way and can provide thickness measurements over the whole cone depth. Measurements are also made insensitive to any transients by use of relatively long photographic exposures. Measurements are compared to analytical theory for axisymmetric, steady state, free-surface laminar flow of a Newtonian fluid in a spinning cone. The theory assumes the flow is thin but takes account of gravity. The theoretical model is found to be in good agreement with the experimental results.
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Gibbons, Nathaniel, Cori Watson-Kassa, Christopher Goyne, and Houston Wood. "Analysis of Labyrinth Seal Flow Patterns to Improve Bulk Flow Code Predictions." In ASME 2019 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2019. http://dx.doi.org/10.1115/imece2019-10972.

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Abstract Non-contacting annular seals are frequently used in turbomachinery to reduce leakage of a fluid through a section with a large pressure differential. A typical type of non-contacting seal is the labyrinth seal, where circumferential grooves are cut into the rotor, stator or both. Using a tortuous path, labyrinth seals reduce leakage by dissipating the fluid’s kinetic energy through viscous forces caused by the formation of vortices in each seal groove. Due to a lower cost when compared to experimental measurements, bulk flow codes are frequently used for predicting seal contributions to rotordynamic performance. Existing seal codes use constant or linear values for the fluid film thickness at different seal sections and display inaccuracies in their prediction of velocity and pressure profiles and rotordynamic coefficients for labyrinth seals when compared to experimental data. The primary objective of this study is to determine the effect of implementing an effective film thickness into the governing bulk flow equations on the code prediction of axial velocity and pressure profiles. Simulations were run using ANSYS CFX with cross-sectional models of individual seal grooves. Seal parameters, including inlet circumferential velocity and rotor speed, were varied to better understand the behavior of the film thickness under various operating conditions. Streamlines were used to determine the maximum film thickness and an effective film thickness profile that can be used in the modified bulk flow code. Modified governing equations were developed, and predictions for the axial profiles resulting from the modified code solutions for the zeroth order governing equations are compared to CFD results and previous code predictions for improved accuracy. Preliminary results for a set of cases indicate far higher accuracy when an effective film thickness is used and represent the first results from a seal bulk flow code that implements a nonlinear effective film thickness. Improvement in code prediction of flow behavior across the seal, and subsequently in the seal codes accurate prediction of rotordynamic coefficients, allows for the design of more efficient and effective seals and machine systems.
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Hedgcock, Marcus W., Suzy Smith, and Tod S. Levitt. "Data flow analysis for transition from film to electronic imagery management." In Medical Imaging VI, edited by R. Gilbert Jost. SPIE, 1992. http://dx.doi.org/10.1117/12.60285.

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Reports on the topic "Film flow analysis"

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Carlsson, Mikael, Julián Messina, and Oskar Nordström Skans. Firm-Level Shocks and Labor Flows. Inter-American Development Bank, 2021. http://dx.doi.org/10.18235/0003002.

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This paper analyzes how labor ows respond to permanent idiosyncratic shifts in rm-level production functions and demand curves using very detailed Swedish micro data. Shocks to rms physical productivity have only modest eects on rm-level employment decisions. In contrast, the paper documents rapid and substantial employment adjustments through hires and separations in response to rm-level demand shocks. The choice of adjustment margin depends on the sign of the shock: rms adjust through increased hires if these shocks are positive and through increased separations if the shocks are negative.
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Carlsson, Mikael, Julián Messina, and Oskar Nordström Skans. Firm-Level Shocks and Labor Flows. Inter-American Development Bank, 2021. http://dx.doi.org/10.18235/0003002.

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This paper analyzes how labor ows respond to permanent idiosyncratic shifts in rm-level production functions and demand curves using very detailed Swedish micro data. Shocks to rms physical productivity have only modest eects on rm-level employment decisions. In contrast, the paper documents rapid and substantial employment adjustments through hires and separations in response to rm-level demand shocks. The choice of adjustment margin depends on the sign of the shock: rms adjust through increased hires if these shocks are positive and through increased separations if the shocks are negative.
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Kumar, Indraneel, Lionel Beaulieu, Annie Cruz-Porter, Chun Song, Benjamin St. Germain, and Andrey Zhalnin. An Assessment of the Workforce and Occupations in the Highway, Street, and Bridge Construction Industries in Indiana. Purdue University, 2020. http://dx.doi.org/10.5703/1288284315018.

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This project explores workforce and occupations within the highway, street, and bridge construction industries (NAICS 237310) in Indiana. There are five specific deliverable comprised of three data reports, one policy document, and a website. The first data report includes an assessment of the workforce based on the eight-part framework, which are industry, occupations, job postings, hard-to-fill jobs, Classification of Instructional Programs (CIP), GAP Analysis, compatibility, and automation. The report defines a cluster followed by a detailed analysis of the occupations, skills, job postings, etc., in the NAICS 237310 industry in Indiana. The report makes use of specialized labor market databases, such as the Economic Modeling Specialists International (EMSI), CHMURA JobsEQ, etc. The analysis is based only on the jobs covered under the unemployment insurance or the Quarterly Census of Employment and Wages (QCEW) data. The second data report analyzes jobs to jobs flows to and from the construction industry in Indiana, with a particular emphasis on the Great Recession, by utilizing the Bureau of Labor Statistics (BLS) data. The third data report looks into the equal employment opportunity or Section 1391 and 1392 data for Indiana and analyzes specific characteristics of that data. The policy report includes a set of recommendations for workforce development for INDOT and a summary of the three data reports. The key data on occupations within the NAICS 237310 are provided in an interactive website. The website provides a data dashboard for individual INDOT Districts. The policy document recommends steps for development of the highways, streets and bridges construction workforce in INDOT Districts.
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