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February 24, 2017, 03:46 |
Vortex Method in Fluent LES
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#1 |
New Member
FeiTeng
Join Date: Jan 2017
Location: Beijing,China
Posts: 12
Rep Power: 9 |
Hi all
I wanna simulate the flow around a cube by using Fluent LES . I know that it is necessary to set fluctuations at Inlet. Now I have some questions: If I use "vortex method" to generate fluctuations at inlet, how could I give the "Number of Vortices"? (By default, the number of vortices is 190). And how this value influence the result? By the way , the version of my Fluent is 17.2 Thanks |
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April 16, 2018, 09:42 |
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#2 |
Senior Member
Join Date: Jul 2009
Posts: 260
Rep Power: 17 |
Hello,
Good question. I read in one of ANSYS' LES solution guides that the number of vortices should be N/4 where N=number of inlet grid cells. But how this influences the solution, I'm not sure. Any further thoughts? |
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October 2, 2018, 10:19 |
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#3 |
Member
James Wright
Join Date: Oct 2015
Posts: 40
Rep Power: 10 |
Do you remember what LES solution guide you saw this in kingjewel1?
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October 2, 2018, 10:39 |
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#4 | |
Senior Member
Join Date: Jul 2009
Posts: 260
Rep Power: 17 |
Quote:
Yes it's in "Quick Guide to Settings UP LES-type Simulations" in the ANSYS customer portal Solution: 2039348. Also here: http://www.tfd.chalmers.se/~lada/com...4_for_Lars.pdf |
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October 2, 2018, 18:18 |
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#5 |
Member
James Wright
Join Date: Oct 2015
Posts: 40
Rep Power: 10 |
Thanks!
Since we're posting relevant references, here's a paper I found that goes over the application of VM. Interesting point, the "Methodology" section of the paper is word-for-word identical to the ANSYS documentation. The lead writer of the paper worked at Fluent, which explains it, but is still pretty unethical (plagiarism does include reproducing your own work with out reference). |
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Tags |
fluent, les, vortex generation |
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