LES
I would like to study decay of vortices structures behind a vortex generator at Re_bulk=5000 in a plain channel, isn't LES a bit of an overkill there ?
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Re: LES
hi, i also work on LES. But what exactly, your problem is? Can you tell?
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Re: LES
I would like to quantify the viscous dissipation of the structures behind the winglet and link it with the heat transfer. I would like to compare stationnary RANS and non stationnary calculations.
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Re: LES
which type of winglet u are using...delta wing or winglet pair....Which paper you would like to compare , related to RANS?
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Re: LES
If I understant correctly, your Re_bulk is not very high. Can you not attempt a DNS? If DNS resolution requirements are too high, I think attempting LES is quite reasonable. If you could explain why you think LES for this is an overkill, I might be able to explain better.
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Re: LES
I want mainly to compare with "Heat transfer in a rectangular channel with a vee-shaped vortex generator" by Sohankar. However, I have a single delta winglet while he have two. He uses dns and LES, and found the results comparables.
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Re: LES
I thought LES was interesting for high Reynolds numbers (more than 10000), but for less, RANS and URANS might be sufficient.
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Re: LES
Yes that is correct. So, with the present computational power, computing DNS for your case should not be much effort, don't you think?
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Re: LES
hi, For the winglet problem....Do, anyone need to satisfy Y+=1 around the winglet body also? as near the wall it must be a criterion for les? Can anyone tell what is the reason?
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