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April 24, 2005, 07:01 |
All three types of flow
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#1 |
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Dear Experts,
Is it possible to show in a single simulaiton to show all three types of flow (laminar, transition and turbulent) as can be seen in a Reynolds apparatus. How can I show this using CFD simulation? Thanks, Harendra |
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April 26, 2005, 05:00 |
Re: All three types of flow
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#2 |
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Hello Harendra,
I am sure the experts in DNS would have a different approach, but for something quick and dirty, The first thought that comes to my mind is apply the low Reynolds, k-omega turbulence model, Transient, set up the flow condition where you are on the verge of transition, thus you should see the steady laminar flow field develop, now use a disturbance to speed up the transition, it is possible that numerical error alone can trip the flow, but I believe a disturbance is better, because you can control it. (The disturbance can be a surge on the inlet velocity or pressure, how long and the magnitude of the disturbance is not a simple question though). Kind Regards, Kevin |
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