|
[Sponsors] |
October 9, 1999, 08:00 |
turbulent mixing of two fluids
|
#1 |
Guest
Posts: n/a
|
hi there
i want to model the mixing of two fluids in a tube bend. the fluids have the same density but very different molecular viscosities. the flow is turbulent (Re about 5000). in fact, i want to solve the problem by using a two fluid model, i.e. i will use two momentum equtions, one mass transport equation and one continuity equation. however, i think that a turbulent viscosity which is calculated independently for each fluid will not lead to correct results. i would be glad is someone who has already modeled this problem can give me some advise how to model physically corret the mixing of two fluids. thanks in advance ulrich |
|
October 9, 1999, 14:57 |
Re: turbulent mixing of two fluids
|
#2 |
Guest
Posts: n/a
|
You are working in a complex area. No wonder you are kind of lost! Let me give you some references for you--
McMurtry, P.A., Jou, W.-H., Riley, J.J. and Metcalfe, R.W. "Direct Numerical Simulations of a Reacting Mixing Layer with Chemical Heat Release," AIAA Journal, 24, pp. 962-970, 1986. McMurtry, P.A., Riley J.J., and Metcalfe, R.W. "Effects of Heat Release on the Large Scale Structures in a Turbulent Reacting Mixing Layer," Journal of Fluid Mechanics, 199, pp. 297-332, 1989. Son, S.F., McMurtry, P.A., and Queiroz, M. "The Effects of Heat Release on Various Statistical Properties of a Reacting Shear Layer," Combustion and Flame, 85, pp. 51-67, 1991. McMurtry, P.A. and Givi, P. "Direct Numerical Simulations of a Reacting, Turbulent Mixing Layer By A Pseudospectral-Spectral Element Method," Finite Element Methods in Fluids, 8, pp. 355-378, 1992. McMurtry, P.A., Menon, S. and Kerstein, A.R. "A Linear Eddy Subgrid Model for Turbulent Reacting Flows: Application to Hydrogen-Air Combustion,"Proceeding of the 24th (International) Symposium on Combustion, the Combustion Institute, pp. 271-278, 1992. McMurtry, P.A., Gansauge, T. and Kerstein, A.R "Linear Eddy Simulations of Mixing and Reaction in A Homogeneous Turbulent Flow," Phys. Fluids A, 5, pp. 1023-1034, 1993. McMurtry, P.A. and Menon, S. "Linear Eddy Simulations of Turbulent Combustion," J. Energy & Fuels, 7, pp. 817-826, 1993. Kerstein, A.R. and McMurtry, P.A. "Mean-Field Theories of Random Advection," Physical Review E, 49, pp. 474-482, 1994. Cremer, M., McMurtry, P.A., and Kerstein, A.R. "Effects of Turbulent and Scalar Length-Scale Distributions on Turbulent Mixing Processes," Phys. Fluids A, 6, pp. 2143-2153, 1994. Kerstein, A.R. and McMurtry, P.A. "Low Wavenumber Statistics of Randomly Advected Passive Scalars," Physical Review E, 50, pp. 2057-2063, 1994. Kerstein, A.R., Cremer, M.A. and McMurtry, P.A. "Scaling Properties of Differential Molecular Diffusion Effects in Turbulence," Physics of Fluids, 7, pp. 1999-2007, 1995. Guilkey, J.E., Gee, K.R., McMurtry, P.A. and Klewicki, J.C. "Use of Caged Fluorescent Dyes for the Study of Turbulent Passive Scalar Mixing," Experiments in Fluids, 21, pp. 237-242, 1996. McMurtry, P.A. "Turbulence," in Encyclopedia of Climate and Weather, pp. 786-793, Oxford University Press, 1996. Guilkey, J.E., Kerstein, A.R., McMurtry, P.A. and Klewicki, J.C. "Long-tailed Probability Distribution Functions in Turbulent Pipe Flow Mixing," Physical Review E, 56, (2), 1753, 1997. Krueger, S.K., Su, C.-W., and McMurtry, P.A. "Modeling Entrainment and Fine- Scale mixing in Cumulus Clouds," Journal of the Atmospheric Sciences, 54, 2697- 2712, 1997. Maynes, D., Klewicki, J.C., McMurtry, P.A. and Robey, H. "Hydrodynamic Scalings in the Rapid Growth of Crystals From Solution," J. Crystal Growth, 178, 545-558, 1997. Maynes, D., Klewicki, J.C., McMurtry, P.A. "Time Resolved Torque of Rotating Bluff Bodies in a Cylindrical Tank," J. Fluids Eng., 120, 23-28, 1998. Su, C-W., Krueger, S.K., McMurtry, P.A. and Austin, P.H., "Linear Eddy Modeling of Droplet Spectral Evolution During Entrainment and Mixing in Cumulus Clouds," Atmospheric Research, 47, 41--58, 1998. Cremer, M. and McMurtry, P.A. "A Model of Turbulent Mixing and Reaction for H2- air Combustion," Journal of Propulsion and Power, 14, 3, 309--317, 1998. |
|
October 9, 1999, 17:15 |
Re: turbulent mixing of two fluids
|
#3 |
Guest
Posts: n/a
|
(1). In the mixing zone, the turbulent Reynolds number will be of O(100) or less. (2). So, I don't think the difference in the molecular viscosity between two fluid is important in the mixing process.
|
|
Thread Tools | Search this Thread |
Display Modes | |
|
|
Similar Threads | ||||
Thread | Thread Starter | Forum | Replies | Last Post |
Turbulent eddy diffusivity for mixing?? | Ray | Main CFD Forum | 3 | November 5, 2020 12:57 |
two mixing compresible fluids solver | ziemowitzima | OpenFOAM Running, Solving & CFD | 27 | August 13, 2020 13:40 |
Turbulent flow of two incompressible fluids with the same physical properties | ArneBab | OpenFOAM Running, Solving & CFD | 3 | January 5, 2010 06:48 |
FIDAP-Properties Definition in Fluids Mixing Area | Q. Hao | FLUENT | 0 | February 17, 2005 13:00 |
Re: turbulent mixing of two fluids | Jin Wook LEE | Main CFD Forum | 0 | October 11, 1999 07:38 |