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April 21, 2009, 15:13 |
Strange spikes in my 2nd Order Solutions
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#1 |
Member
Daniel Harlacher
Join Date: Mar 2009
Location: Davis, CA, United States
Posts: 60
Rep Power: 17 |
Hi all,
I have trouble with the second order schemes for the convective part at high reynolds numbers. I am running a 2D cylinder at Re 27400 with a RAS turbulence model (kE or RNG) and get a solution like the one shown in the picture I linked: The coefficients are calculated with the common controlDict entries and the plot is made with a simple gnuplot command. As you can see the solution is "decorated" with random spikes(these can be huge ~100000). I am using the "Gauss linear" for the convective term. Anyone any ideas? -harly |
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April 22, 2009, 12:51 |
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#2 |
Senior Member
Hua Zen
Join Date: Mar 2009
Posts: 138
Rep Power: 17 |
Hi,Daniel
I could not answer your question.I recently also do some numerical analysis of the cylinder flow at hight Re number.I remember once I have tried a case similiar to yours.2*10^5,but get a differenct result.Could you share the files?I would like to do a comparative analysis of this case. |
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April 22, 2009, 21:13 |
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#3 |
Member
Daniel Harlacher
Join Date: Mar 2009
Location: Davis, CA, United States
Posts: 60
Rep Power: 17 |
Sure,
it will take me a day or two, to come back to you, but just post your email address and I will send you the file. - harly |
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