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#21 |
Member
Florian Ries
Join Date: Feb 2014
Location: Darmstadt, Germany
Posts: 88
Rep Power: 12 ![]() |
Hi mgg,
me too ![]() Concerning the accuracy please read this: Quasi-DNS capabiltities of OpenFOAM for different mesh types. Ed Komen very interessting ![]() kind regards Florian |
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#22 | |
New Member
Join Date: Nov 2012
Posts: 27
Rep Power: 14 ![]() |
Quote:
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#23 | |
Senior Member
Huang Xianbei
Join Date: Sep 2013
Location: Yangzhou,China
Posts: 302
Rep Power: 14 ![]() |
Quote:
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#24 |
Member
Florian Ries
Join Date: Feb 2014
Location: Darmstadt, Germany
Posts: 88
Rep Power: 12 ![]() |
hi mgg,
not sure if structured or unstructed grid make a major difference. In my pipe-flow simulation I used similar amount of cells (structured mesh). The problem is the numerical diffusivity. With OpenFOAM the numerical diffusivity is very high in my opinion, especially if the grid is "coarse" (if we can say coarse for DNS ![]() I use only Gauss linear schemes, poorly 2nd order. I will see next week the result of my DNS, then I can tell you more about accuracy of FVM DNS. kind regards Florian |
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#25 | |
New Member
Join Date: Nov 2012
Posts: 27
Rep Power: 14 ![]() |
Hi Florian,
long time no see. How does your results look? regards, mgg Quote:
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#26 |
Member
Niu
Join Date: Apr 2014
Posts: 55
Rep Power: 12 ![]() |
Hi andersn,
How about your DNS of duct flow? have you compared your results with other papers' results? |
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#27 | |
Member
Jason Tan
Join Date: Sep 2014
Posts: 47
Rep Power: 12 ![]() |
Quote:
What I'm doing now is duct flow. And I met some problems in it. I don't know how to use the perturbU to initial U fields, I think the block is the setting of perturbUDict. At present, all the perturbU files are about channel flow. Did you use the perturbU to initial your U fields?And How? Best wishes. |
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dns |
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