[philt]

Hi

I am thinking about using OpenFOAM for LES computations. Can anyone tell me from their experience what resources are required to solve on a mesh of, say, 5-10 million cells (i.e. CPU time, number of processors,..) Are there published papers on use of OpenFOAM for LES?

[eugene]

You haven't given a lot of information, but I'll take a stab at it anyway.
10 million cell LES would probably require about 16 cpus running for a month. This number is just ballpark. It will vary considerably depending on your application.

[grtabor]

Answering the second part (or at least some of it):

A Comparative Study of Sub Grid Scale Models in Homogeneous Isotropic Turbulence
C.Fureby, G.Tabor, H.Weller \& A.D.Gosman
{{\it Phys.Fluids} {\bf 9\#5} pp.1416 - 1429 (1997)}

Differential Subgrid Stress Models in Large Eddy Simulations}
{C.Fureby, G.Tabor, H.G.Weller \& A.D.Gosman}
{{\it Phys.Fluids.} {\bf 9\#11} pp. 3578 - 3580 (1997)}

Mathematical and Physical Constraints on Large Eddy Simulations}
{C.Fureby \& G.Tabor}
{{\it Theor.Comp.Fluid Dynamics}. {\bf 9\#2} pp.75 - 83 (1997)}

Large Eddy Simulation of the Flow Around a Square Prism}
{C.Fureby, G.Tabor, H.G.Weller, \& A.D. Gosman}
{{\it AIAA.J.} {\bf 38\#3} pp.442 -- 452 (2000)}

Large Eddy Simulation of Premixed Turbulent
Combustion using $\Xi$ Flame Surface Wrinkling Model}
{G.Tabor and H.G.Weller}{{\it Flow, Turbulence and
Combustion} {\bf 72\#1} pp.1 -- 27 (2004)}

Construction of Inlet Conditions for LES of Turbulent Channel Flow}
{G. Tabor, M. H. Baba-Ahmadi, E. de Villiers, H.Weller}{
{\it ECCOMAS 2004 Congress}, Finland (2004)}

Large Eddy Simulation of Turbulent Channel Flows}
{C.Fureby, A.D.Gosman, G.Tabor, H.G.Weller, N.Sandham \& M.Wolfshtein}
{Proceedings of {\it Turbulent Shear Flows 11}, vol.3 pp.28-13 (1997)}

A comparison between inlet conditions for Large Eddy Simulaton, M.H.Baba-Ahmadi, G.Tabor, E. de Villiers, H.G.Weller, submitted to: Physics of Fluids (2006)

Hope this helps! Sorry about the formatting.

Gavin

[hjasak]

Hi Gavin,

Nice paper name ( Physics of Fluids ) - can I have a copy when it's done please? In return, I'm offering some (utterly cool!) fluid-structure interaction: flapping console

Thanks,

Hrv

[grtabor]

Will do on Monday - if I can retrieve it from the smoking pile of hardware which used to be my office computer. Motherboard has blown, so all I have at the moment is the hard disk... Luckly I had just made a backup, so everything is retrievable to other machines (eg. my laptop) but its bloody inconvenient.

Love the FSI, BTW.

Gavin