viscous validation cases

naffrancois · June 20, 2017, 03:03

Dear all,

I implemented in a finite volume code full implicit and imex semi-implicit schemes for the NS equations at present without any turbulence model. I am looking for 2D/3D laminar viscous validation cases, apart from circular cylinder and flat plate that would show the gain of implicit time integration, especially for imex. Any idea will be greatly appreciated !

Cheers

FMDenaro · June 20, 2017, 03:16

Quote:

Originally Posted by naffrancois

Dear all,

I implemented in a finite volume code full implicit and imex semi-implicit schemes for the NS equations at present without any turbulence model. I am looking for 2D/3D laminar viscous validation cases, apart from circular cylinder and flat plate that would show the gain of implicit time integration, especially for imex. Any idea will be greatly appreciated !

Cheers

This is an exact solution https://pdfs.semanticscholar.org/434...00ac52c18e.pdf

I suggest to simulate also the backward facing-step and the lid-driven cavity as wall-bounded laminar flows

naffrancois · June 20, 2017, 07:31

Thank you FDenaro for these suggestions. I forgot to mention that I am dealing with the compressible NSE, so I think the lid-driven cavity test would be difficult without preconditionning.

apoorv · June 20, 2017, 07:43

Search for low Reynolds number wind turbine airfoil case, that may laminar. Hoping that you are working on Preconditioned solver or a compressible solver that can work on mach 0.1.

FMDenaro · June 20, 2017, 09:00

Quote:

Originally Posted by naffrancois

Thank you FDenaro for these suggestions. I forgot to mention that I am dealing with the compressible NSE, so I think the lid-driven cavity test would be difficult without preconditionning.

laminar flows are characterized by low Re number and that often implies low Mach number, without preconditioning the system is difficult to solve any of these cases

naffrancois · June 21, 2017, 02:47

I see, it makes sense. No chance to find a realistic transonic case in laminar regime I guess. Thank you for your answers

FMDenaro · June 21, 2017, 11:23

Quote:

Originally Posted by naffrancois

I see, it makes sense. No chance to find a realistic transonic case in laminar regime I guess. Thank you for your answers

Well, some special airfoil profile have laminar design (at moderate Mach number)..You could try to search for some database...

arjun · June 21, 2017, 20:37

removing the post as code was not properly attached.

arjun · June 21, 2017, 20:40

Quote:

Originally Posted by FMDenaro

Well, some special airfoil profile have laminar design (at moderate Mach number)..You could try to search for some database...

Code for the attached paper.

June 20, 2017, 03:03	viscous validation cases	#1
naffrancois Senior Member Join Date: Oct 2011 Posts: 239 Rep Power: 16	Dear all, I implemented in a finite volume code full implicit and imex semi-implicit schemes for the NS equations at present without any turbulence model. I am looking for 2D/3D laminar viscous validation cases, apart from circular cylinder and flat plate that would show the gain of implicit time integration, especially for imex. Any idea will be greatly appreciated ! Cheers

June 20, 2017, 07:43	Search for wind turbine cases	#4
apoorv Member A. S. Join Date: Apr 2009 Location: Raipur (INDIA) Posts: 54 Rep Power: 17	Search for low Reynolds number wind turbine airfoil case, that may laminar. Hoping that you are working on Preconditioned solver or a compressible solver that can work on mach 0.1.

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June 20, 2017, 07:31		#3
naffrancois Senior Member Join Date: Oct 2011 Posts: 239 Rep Power: 16	Thank you FDenaro for these suggestions. I forgot to mention that I am dealing with the compressible NSE, so I think the lid-driven cavity test would be difficult without preconditionning.

June 21, 2017, 02:47		#6
naffrancois Senior Member Join Date: Oct 2011 Posts: 239 Rep Power: 16	I see, it makes sense. No chance to find a realistic transonic case in laminar regime I guess. Thank you for your answers

June 21, 2017, 20:37		#8
arjun Senior Member Arjun Join Date: Mar 2009 Location: Nurenberg, Germany Posts: 1,273 Rep Power: 34	removing the post as code was not properly attached.