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Journal articles on the topic 'Free Surface Flow'

To see the other types of publications on this topic, follow the link: Free Surface Flow.

Author: Grafiati

Published: 4 June 2021

Last updated: 1 June 2024

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1

Minato, Akihiko, Nobuyuki Nakajima, and Takahide Nagahara. "SIMULATION OF FREE SURFACE FLOW BY SP-VOF MODEL(Numerical Simulation)." Proceedings of the International Conference on Jets, Wakes and Separated Flows (ICJWSF) 2005 (2005): 717–20. http://dx.doi.org/10.1299/jsmeicjwsf.2005.717.

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2

Hoashi, Eiji, Hirokazu Sugiura, Sachiko Yoshihashi-Suzuki, Takuji Kanemura, Hiroo Kondo, Nobuo Yamaoka, and Hiroshi Horiike. "ICONE19-44185 Study on Surface Wave Characteristics of Free Surface Flow of Lithium for IFMIF." Proceedings of the International Conference on Nuclear Engineering (ICONE) 2011.19 (2011): _ICONE1944. http://dx.doi.org/10.1299/jsmeicone.2011.19._icone1944_58.

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3

Yeh, Harry H., and Mandira Shrestha. "Free‐Surface Flow Through Screen." Journal of Hydraulic Engineering 115, no. 10 (October 1989): 1371–85. http://dx.doi.org/10.1061/(asce)0733-9429(1989)115:10(1371).

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4

Federico, Vittorio Di. "Free-surface flow of hyperconcentrations." Fluid Dynamics Research 24, no. 1 (January 1999): 23–36. http://dx.doi.org/10.1016/s0169-5983(98)00011-2.

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5

Gupta, Sanjay K. "Section: Free surface flow measurements." Flow Measurement and Instrumentation 54 (April 2017): 273. http://dx.doi.org/10.1016/j.flowmeasinst.2016.11.008.

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6

Wang, F. J., and G. A. Domoto. "Free-surface Taylor vortices." Journal of Fluid Mechanics 261 (February 25, 1994): 169–98. http://dx.doi.org/10.1017/s0022112094000303.

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The hydrodynamic instability of a viscous incompressible flow with a free surface is studied both numerically and experimentally. While the free-surface flow is basically two-dimensional at low Reynolds numbers, a three-dimensional secondary flow pattern similar to the Taylor vorticies between two concentric cylinders appears at higher rotational speeds. The secondary flow has periodic velocity components in the axial direction and is characterized by a distinct spatially periodic variation in surface height similar to a standing wave. A numerical method, using boundary-fitted coordinates and multigrid methods to solve the Navier–Stokes equations in primitive variables, is developed to treat two-dimensional free-surface flows. A similar numerical technique is applied to the linearized three-dimensional perturbation equations to treat the onset of secondary flows. Experimental measurements have been obtained using light sheet techniques to visualize the secondary flow near the free surface. Photographs of streak lines were taken and compared to the numerical calculations. It has been shown that the solution of the linearized equations contains most of the important features of the nonlinear secondary flows at Reynolds number higher than the critical value. The experimental results also show that the numerical method predicts well the onset of instability in terms of the critical wavenumber and Reynolds number.

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7

Kamath, Arun, Gábor Fleit, and Hans Bihs. "Investigation of Free Surface Turbulence Damping in RANS Simulations for Complex Free Surface Flows." Water 11, no. 3 (March 4, 2019): 456. http://dx.doi.org/10.3390/w11030456.

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The modelling of complex free surface flows over weirs and in the vicinity of bridge piers is presented in a numerical model emulating open channel flow based on the Reynolds Averaged Navier-Stokes (RANS) equations. The importance of handling the turbulence at the free surface in the case of different flow regimes using an immiscible two-phase RANS Computational Fluid Dynamics (CFD) model is demonstrated. The free surface restricts the length scales of turbulence and this is generally not accounted for in standard two-equation turbulence modelling approaches. With the two-phase flow approach, large-velocity gradients across the free surface due to the large difference in the density of the fluids can lead to over-production of turbulence. In this paper, turbulence at the free surface is restricted with an additional boundary condition for the turbulent dissipation. The resulting difference in the free surface features and the consequences for the solution of the flow problem is discussed for different flow conditions. The numerical results for the free surface and stream-wise velocity gradients are compared to experimental data to show that turbulence damping at the free surface provides a better representation of the flow features in all the flow regimes and especially in cases with rapidly varying flow conditions.

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8

IZUMI, Norihiro, and Adriano Coutinho DE LIMA. "STABILITY OF FREE SURFACE FLOW REVISITED." Journal of Japan Society of Civil Engineers, Ser. A2 (Applied Mechanics (AM)) 70, no. 2 (2014): I_801—I_806. http://dx.doi.org/10.2208/jscejam.70.i_801.

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9

Mazouchi, Ali, and G. M. Homsy. "Free surface Stokes flow over topography." Physics of Fluids 13, no. 10 (October 2001): 2751–61. http://dx.doi.org/10.1063/1.1401812.

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10

Hjorth, P. G. "Stability of free surface sediment flow." Journal of Geophysical Research 95, no. C11 (1990): 20363. http://dx.doi.org/10.1029/jc095ic11p20363.

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11

Blom, P., and R. Booij. "Turbulent free-surface flow over sills." Journal of Hydraulic Research 33, no. 5 (September 1995): 663–82. http://dx.doi.org/10.1080/00221689509498563.

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12

Yan, B. "Oscillatory flow beneath a free surface." Fluid Dynamics Research 22, no. 1 (January 1998): 1–23. http://dx.doi.org/10.1016/s0169-5983(97)00027-0.

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13

King, A. C., and M. I. G. Bloor. "Free-surface flow over a step." Journal of Fluid Mechanics 182, no. -1 (September 1987): 193. http://dx.doi.org/10.1017/s0022112087002301.

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14

Singh, Anugrah, Avinoam Nir, and Raphael Semiat. "Free-surface flow of concentrated suspensions." International Journal of Multiphase Flow 32, no. 7 (July 2006): 775–90. http://dx.doi.org/10.1016/j.ijmultiphaseflow.2006.02.018.

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15

Åkerstedt, Hans O., and Hans B. Löfgren. "Free-surface magnetohydrodynamic flow with solidification." European Journal of Mechanics - B/Fluids 22, no. 6 (November 2003): 581–601. http://dx.doi.org/10.1016/j.euromechflu.2003.06.001.

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16

Akkerman, I., Y. Bazilevs, C. E. Kees, and M. W. Farthing. "Isogeometric analysis of free-surface flow." Journal of Computational Physics 230, no. 11 (May 2011): 4137–52. http://dx.doi.org/10.1016/j.jcp.2010.11.044.

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17

Pratama, Anjeryan Sapta, Evi Noviani, and Yudhi Yudhi. "FLUID FLOW MODELLING WITH FREE SURFACE." BAREKENG: Jurnal Ilmu Matematika dan Terapan 16, no. 4 (December 15, 2022): 1147–58. http://dx.doi.org/10.30598/barekengvol16iss4pp1147-1158.

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Fluid is a substance that can flow in the form of a liquid or a gas. Based on the movement of the fluid is divided into static and dynamic fluids. This study discusses fluid dynamics, namely modelling fluid flow accompanied by a free surface and an obstacle in the fluid flow. Fluid modelling generally makes some basic assumptions into mathematical equations. The assumptions are incompressible, steady-state and irrotational. The steps to obtain a fluid flow model are using Newton’s second law, the law of conservation of mass, and the law of conservation of momentum to obtain the general Navier-Stokes equation, the designing the Euler free surface equation, the Bernoulli equation, then making a free surface representation and linearizing the wave equation so that it is obtained fluid flow model. The resulting mathematical model is a Laplace equation with boundary conditions in the fluid.

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18

EGGERS, J., and A. F. SMITH. "Free streamline flows with singularities." Journal of Fluid Mechanics 647 (March 18, 2010): 187–200. http://dx.doi.org/10.1017/s0022112009993624.

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We rederive and expand upon a method for finding solutions to the two-dimensional irrotational (inviscid) flow equations in the presence of a free surface, found by Hopkinson. This method allows the flow to be driven by placing singularities, like sources or vortices, in the interior of the flow domain. We then apply the method to find a number of novel solutions: separated flow driven by a source, vortices behind a plate and free-surface flow stirred by a double vortex. Free surfaces generically exhibit cusp singularities with a 2/3 power index, similar to those found in very viscous flow.

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19

Zhang, Z. J., and F. Stern. "Free-Surface Wave-Induced Separation." Journal of Fluids Engineering 118, no. 3 (September 1, 1996): 546–54. http://dx.doi.org/10.1115/1.2817793.

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Free-surface wave-induced separation is studied for a surface-piercing NACA 0024 foil over a range of Froude numbers (0, .2, .37, .55) through computational fluid dynamics of the unsteady Reynolds-averaged Navier-Stokes and the continuity equations with the Baldwin-Lomax turbulence model, exact nonlinear kinematic and approximate dynamic free-surface boundary conditions, and a body/free-surface conforming grid. The flow conditions and uncertainty analysis are discussed. A topological rule for a surface-piercing body is derived and verified. Steady-flow results are presented and analyzed with regard to the wave and viscous flow and the nature of the separation.

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20

Berger, R. C., and G. F. Carey. "Free-surface flow over curved surfaces: Part I: Perturbation analysis." International Journal for Numerical Methods in Fluids 28, no. 2 (August 15, 1998): 191–200. http://dx.doi.org/10.1002/(sici)1097-0363(19980815)28:2<191::aid-fld705>3.0.co;2-n.

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21

Berger, R. C., and G. F. Carey. "Free-surface flow over curved surfaces: Part II: Computational model." International Journal for Numerical Methods in Fluids 28, no. 2 (August 15, 1998): 201–13. http://dx.doi.org/10.1002/(sici)1097-0363(19980815)28:2<201::aid-fld706>3.0.co;2-q.

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22

SAVELSBERG, RALPH, and WILLEM VAN DE WATER. "Experiments on free-surface turbulence." Journal of Fluid Mechanics 619 (January 25, 2009): 95–125. http://dx.doi.org/10.1017/s0022112008004369.

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We study the free surface of a turbulent flow, in particular the relation between the statistical properties of the wrinkled surface and those of the velocity field beneath it. Channel flow turbulence is generated using an active grid. Through a judicial choice of the stirring protocol the anisotropy of the subsurface turbulence can be controlled. The largest Taylor Reynolds number obtained is Reλ = 258. We characterize the homogeneity and isotropy of the flow and discuss Taylor's frozen turbulence hypothesis, which applies to the subsurface turbulence but not to the surface. The surface gradient field is measured using a novel laser-scanning device. Simultaneously, the velocity field in planes just below the surface is measured using particle image velocimetry (PIV). Several intuitively appealing relations between the surface gradient field and functionals of the subsurface velocity field are tested. For an irregular flow shed off a vertical cylinder, we find that surface indentations are strongly correlated with both vortical and strain events in the velocity field. For fully developed turbulence this correlation is dramatically reduced. This is because the large eddies of the subsurface turbulent flow excite random capillary–gravity waves that travel in all directions across the surface. Therefore, the turbulent surface has dynamics of its own. Nonetheless, it does inherit both the integral scale, which determines the predominant wavelength of the capillary–gravity surface waves, and the (an)isotropy from the subsurface turbulence. The kinematical aspects of the surface–turbulence connection are illustrated by a simple model in which the surface is described in terms of waves originating from Gaussian wave sources that are randomly sprinkled on the moving surface.

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23

Cazacu, M. D. "FLOW VISUALIZATION AT THE LIQUID FREE SURFACE." Journal of Flow Visualization and Image Processing 1, no. 3 (1993): 181–88. http://dx.doi.org/10.1615/jflowvisimageproc.v1.i3.30.

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24

HISAHARA, Aika, Adriano Coutinho DE LIMA, and Norihiro IZUMI. "NONLINEAR STABILITY ANALYSIS OF FREE SURFACE FLOW." Journal of Japan Society of Civil Engineers, Ser. B1 (Hydraulic Engineering) 74, no. 4 (2018): I_607—I_612. http://dx.doi.org/10.2208/jscejhe.74.i_607.

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25

Chen, Tong, and Allen T. Chwang. "Trailing vortices in a free-surface flow." Physics of Fluids 14, no. 2 (February 2002): 827–38. http://dx.doi.org/10.1063/1.1432320.

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26

Navti, S. E., R. W. Lewis, and C. Taylor. "Numerical simulation of viscous free surface flow." International Journal of Numerical Methods for Heat & Fluid Flow 8, no. 4 (June 1998): 445–64. http://dx.doi.org/10.1108/09615539810213223.

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27

Mizumura, Kazumasa. "Free Surface Flow over Permeable Wavy Bed." Journal of Hydraulic Engineering 124, no. 9 (September 1998): 955–62. http://dx.doi.org/10.1061/(asce)0733-9429(1998)124:9(955).

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28

Song, Charles C. S., and Fayi Zhou. "Simulation of Free Surface Flow over Spillway." Journal of Hydraulic Engineering 125, no. 9 (September 1999): 959–67. http://dx.doi.org/10.1061/(asce)0733-9429(1999)125:9(959).

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29

Horiike, Hiroshi, Mizuho Ida, Toshiyuki Iida, Shoji Inoue, Seiji Miyamoto, Takeo Muroga, Hideo Nakamura, Hiroo Nakamura, Izuru Matsushita, and Nobuo Yamaoka. "Lithium free surface flow experiment for IFMIF." Fusion Engineering and Design 66-68 (September 2003): 199–204. http://dx.doi.org/10.1016/s0920-3796(03)00205-9.

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30

Habera, M., and J. Hron. "Modelling of a free-surface ferrofluid flow." Journal of Magnetism and Magnetic Materials 431 (June 2017): 157–60. http://dx.doi.org/10.1016/j.jmmm.2016.10.045.

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31

Ueki, Heihachi, Atsushi Kunimatsu, and Ken Tanaka. "Free Surface Flow Simulation for Computer Graphics." Proceedings of The Computational Mechanics Conference 2003.16 (2003): 5–6. http://dx.doi.org/10.1299/jsmecmd.2003.16.5.

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32

Vanden-Broeck, Jean-Marc, and Joseph B. Keller. "Free surface flow due to a sink." Journal of Fluid Mechanics 175, no. -1 (February 1987): 109. http://dx.doi.org/10.1017/s0022112087000314.

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33

Dai, Meizhong, and David P. Schmidt. "Adaptive tetrahedral meshing in free-surface flow." Journal of Computational Physics 208, no. 1 (September 2005): 228–52. http://dx.doi.org/10.1016/j.jcp.2005.02.012.

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34

Huerta, Antonio, and Wing Kam Liu. "Viscous flow with large free surface motion." Computer Methods in Applied Mechanics and Engineering 69, no. 3 (August 1988): 277–324. http://dx.doi.org/10.1016/0045-7825(88)90044-8.

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35

Bouderah, B., A. Gasmi, and H. Serguine. "Zero gravity of free-surface jet flow." International Mathematical Forum 2 (2007): 3273–77. http://dx.doi.org/10.12988/imf.2007.07300.

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36

SAWADA, Yoshinao, Oaki IIDA, and Yasutaka NAGANO. "DNS of Decaying Free-Surface Turbulence Flow." Proceedings of Conference of Tokai Branch 2003.52 (2003): 65–66. http://dx.doi.org/10.1299/jsmetokai.2003.52.65.

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37

Lungu, A., and F. Pacuraru. "Free-surface flow around an appended hull." IOP Conference Series: Earth and Environmental Science 12 (August 1, 2010): 012079. http://dx.doi.org/10.1088/1755-1315/12/1/012079.

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38

Blyth, M. G., and J. M. Vanden-Broeck. "Free-surface flow over a trapped bubble." IMA Journal of Applied Mathematics 73, no. 5 (May 22, 2008): 803–14. http://dx.doi.org/10.1093/imamat/hxn014.

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39

Glaister, P. "Prediction of steady, supercritical, free-surface flow." International Journal of Engineering Science 33, no. 6 (May 1995): 845–54. http://dx.doi.org/10.1016/0020-7225(94)00095-2.

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40

Liggett, James A. "Free surface flow — exposing the hidden nonlinearity." Communications in Applied Numerical Methods 4, no. 4 (July 1988): 509–16. http://dx.doi.org/10.1002/cnm.1630040407.

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41

Siginer, A., and R. Knight. "Swirling free surface flow in cylindrical containers." Journal of Engineering Mathematics 27, no. 3 (August 1993): 245–64. http://dx.doi.org/10.1007/bf00128966.

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42

Kaiser, Kenneth L., Mark J. Kaiser, and Walter L. Weeks. "A simulation of free-surface electrohydrodynamic flow." Communications in Numerical Methods in Engineering 10, no. 4 (April 1994): 339–53. http://dx.doi.org/10.1002/cnm.1640100409.

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43

Lin, Meng-yu, and Liang-hsiung Huang. "Free-surface flow past a submerged cylinder." Journal of Hydrodynamics 22, S1 (October 2010): 209–14. http://dx.doi.org/10.1016/s1001-6058(09)60195-5.

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44

LONGUET-HIGGINS, MICHAEL S. "Vorticity and curvature at a free surface." Journal of Fluid Mechanics 356 (February 10, 1998): 149–53. http://dx.doi.org/10.1017/s0022112097007817.

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For two-dimensional flow there is a simple relation between the vorticity at a stress-free surface and the surface curvature. In this note the relation is generalized to flow in three dimensions. It is shown that in addition to a component of vorticity perpendicular to the flow there is also a component parallel to the direction of flow. The latter vanishes only at an umbilical point or when the flow is in one of the two principal directions of curvature.

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45

Muste, Marian, Jörg Schöne, and Jean-Dominique Creutin. "Measurement of free-surface flow velocity using controlled surface waves." Flow Measurement and Instrumentation 16, no. 1 (March 2005): 47–55. http://dx.doi.org/10.1016/j.flowmeasinst.2004.08.003.

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46

Chanson, H. "Free-surface flows with near-critical flow conditions." Canadian Journal of Civil Engineering 23, no. 6 (December 1, 1996): 1272–84. http://dx.doi.org/10.1139/l96-936.

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Open channel flow situations with near-critical flow conditions are often characterized by the development of free-surface instabilities (i.e., undulations). The paper develops a review of several near-critical flow situations. Experimental results are compared with ideal-fluid flow calculations. The analysis is completed by a series of new experiments. The results indicate that, for Froude numbers slightly above unity, the free-surface characteristics are very similar. However, with increasing Froude numbers, distinctive flow patterns develop. Key words: open channel flow, critical flow conditions, free-surface undulations, flow instability, undular surge, undular broad-crested weir flow, culvert flow.

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47

Zhang, Wei, You Hong Tang, Cheng Bi Zhao, and Cheng Zhang. "A Two-Phase Flow Model with VOF for Free Surface Flow Problems." Applied Mechanics and Materials 232 (November 2012): 279–83. http://dx.doi.org/10.4028/www.scientific.net/amm.232.279.

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A numerical model based on the two-phase flow model for incompressible viscous fluid with a complex free surface has been developed in this study. The two-step projection method is employed to solve the Navier–Stokes equations in the numerical solutions, and finite difference method on a staggered grid is used throughout the computation. The two-order accurate volume of fluid (VOF) method is used to track the distorted and broken free surfaces. The two-phase model is first validated by simulating the dam break over a dry bed, in which the numerical results and experimental data agree well. Then 2-D fluid sloshing in a horizontally excited rectangular tank at different excitation frequencies is simulated using this two-phase model. The results of this study show that the two-phase flow model with VOF method is a potential tool for the simulation of nonlinear fluid sloshing. These studies demonstrate the capability of the two-phase model to simulate free surface flow problems with considering air movement effects.

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48

Daneshmand, Farhang, S. A. Samad Javanmard, Jan F. Adamowski, Tahereh Liaghat, and Mohammad Mohsen Moshksar. "Two-dimensional natural element analysis of double-free surface flow under a radial gate." Canadian Journal of Civil Engineering 39, no. 6 (June 2012): 643–53. http://dx.doi.org/10.1139/l2012-046.

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The gravity-driven free surface flow problems for which both the solid and free surface boundaries are highly curved are very difficult to solve. A computational scheme using a variable domain and a fixed domain natural element method (NEM) is developed in the present study for the computation of the free surface profile, velocity and pressure distributions, and the flow rate of a 2D gravity fluid flow through a conduit and under a radial gate. The problem involves two highly curved unknown free surfaces and arbitrary curved-shaped boundaries. These features make the problem more complicated than flow under a sluice gate or over a weir. The fluid is assumed to be inviscid and incompressible and the results obtained are confirmed by conducting a hydraulic model test. The results are in agreement with other flow solutions for free surface profiles and pressure distributions.

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49

Shao, Kaixuan, Yinghan Wu, and Suizi Jia. "An Improved Neural Particle Method for Complex Free Surface Flow Simulation Using Physics-Informed Neural Networks." Mathematics 11, no. 8 (April 11, 2023): 1805. http://dx.doi.org/10.3390/math11081805.

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The research on free surface flow is of great interest in fluid mechanics, with the primary task being the tracking and description of the motion of free surfaces. The development of numerical simulation techniques has led to the application of new methods in the study of free surface flow problems. One such method is the Neural Particle Method (NPM), a meshless approach for solving incompressible free surface flow. This method is built on a Physics-Informed Neural Network (PINN), which allows for training and solving based solely on initial and boundary conditions. Although the NPM is effective in dealing with free surface flow problems, it faces challenges in simulating more complex scenarios due to the lack of additional surface recognition algorithms. In this paper, we propose an improved Neural Particle Method (INPM) to better simulate complex free surface flow. Our approach involves incorporating alpha-shape technology to track and recognize the fluid boundary, with boundary conditions updated constantly during operation. We demonstrate the effectiveness of our proposed method through three numerical examples with different boundary conditions. The result shows that: (1) the addition of a surface recognition module allows for the accurate tracking and recognition of the fluid boundary, enabling more precise imposition of boundary conditions in complex situations; (2) INPM can accurately identify the surface and calculate even when particles are unevenly distributed. Compared with traditional meshless methods, INPM offers a better solution for dealing with complex free surface flow problems that involve random particle distribution. Our proposed method can improve the accuracy and stability of numerical simulations for free surface flow problems.

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50

Uzawa, Ken, and Tadashi Watanabe. "ICONE19-43453 EFFECTS OF TURBULENCE NEAR A FREE SURFACE ON THE DYNAMICS OF TWO-PHASE FLOW." Proceedings of the International Conference on Nuclear Engineering (ICONE) 2011.19 (2011): _ICONE1943. http://dx.doi.org/10.1299/jsmeicone.2011.19._icone1943_185.

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