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Large eddy simulation of a turbulent plume in stratified medium |
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June 29, 2021, 13:55 |
Numerical simulation of a turbulent plume
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NITIN KUMAR
Join Date: Apr 2018
Posts: 3
Rep Power: 8 |
Hi, Foamers, I am running a large eddy simulation of a turbulent plume in a density varying medium (stratified medium). I am comparing mean axial velocity with an experimental study. I found that qualitatively I m getting a good agreement. However quantitatively, There are differences that can be clearly seen in the velocity. I am trying to figure out why this difference or deviation is coming.
For details: I am using the dynamic k-equation model in OpenFOAM-5.0. I am using buoyantBoussinesqPimplefoam solver (which I modified for the stratified medium). Apart from that, the plume is a forced plume with initial buoyancy and momentum. I am using around 10 million cells for the computation. I have also plotted turbulent kinetic energy (LES) with the experimental value on the centerline. I observed that resolved Kinetic energy is more as compared to experiment, which quite strange. I am not able to figure out what is the issue. I WILL BE very grateful if any experienced user help. Also, I observed that the entrainment is less from the velocity contours. Last edited by nitinkumar@cfd; July 2, 2021 at 00:21. |
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Tags |
les simulation, openfoam, plume entrainment, thermal plume, turbulence |
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