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May 5, 2011, 23:35 |
Turbulence Model for PV Analysis
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#1 |
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Join Date: Sep 2010
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What would be a suitable turbulence model for analysis of Personalised ventilation systems? There will be a jet blown onto a seated human manikin and there'll definitely be boundary layer interaction.
We tried K-e and SST on a validation model of two impingement jets but the velocity decay in the middle region was around 40% of the experimental data. |
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May 6, 2011, 03:21 |
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#2 |
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Glenn Horrocks
Join Date: Mar 2009
Location: Sydney, Australia
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Did you you do the necessary accuracy check to make sure your validation model was accurate - mesh size, time step, convergence, other physics?
There has been a lot of research done on decay of a turbulent jet. If you dig up the literature you should be able to find the best turbulence model to get the jet decay accurate. |
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May 6, 2011, 04:58 |
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#3 |
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well, it converged to 1e-4 and using auto timestep and the meshing is an ordered grid whenever possible.
But you're right. I'll check out some literature. |
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May 6, 2011, 09:15 |
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#4 |
Super Moderator
Glenn Horrocks
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Location: Sydney, Australia
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Looks like you need to do some validation of your model before you claim the turbulence model is inaccurate; Have a look at the tips here and in the CFX documentation.
http://www.cfd-online.com/Wiki/Ansys..._inaccurate.3F |
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