Kolmogorov microscale for a check valve - Page 2 -- CFD Online Discussion Forums

September 15, 2016, 09:16

#21

cymbourne

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Quote:

Originally Posted by FMDenaro

that's not possible... no 2D DNS can give a physically meaningful solution of the real 3D turbulent flow around a valve.
I am not aware of any relevant publication in the DNS/LES community of an axisymmetric DNS study.

I suspect:
1) the 3D case has not yet developed the fully developed unsteady flow.
2) your code has a lot of numerical viscosity
3) you are using a too coarse grid

I couldn't agree with you more. A 2D DNS simulation makes no sense from a theoretical point of view

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