overflow problem

November 24, 2006, 08:11

i'm having problems with overflow in solver cfx!

my simulation is transient and i set many times the boundary conditions and initial conditions to try to get goos results.

my turbulence model is LES and my simulation is an atmospheric dispersion aroun a bulding.

who knows about problems like this in transient simulations?

is this problem with bad mesh, or the conditions???

thanks a lot

bruno

November 24, 2006, 11:23

Yes, your problem is probably a bad mesh and/or an inadequate timestep. There's no way to know for sure with the information you provided.

November 26, 2006, 17:28

Hi,

Doing a LES simulation when you have not got the basics under control is a bad idea. I recommend you switch to a RANS turbulence model (SST or k-epsilon).

Glenn Horrocks

November 24, 2006, 08:11	overflow problem	#1
bruno Guest Posts: n/a	i'm having problems with overflow in solver cfx! my simulation is transient and i set many times the boundary conditions and initial conditions to try to get goos results. my turbulence model is LES and my simulation is an atmospheric dispersion aroun a bulding. who knows about problems like this in transient simulations? is this problem with bad mesh, or the conditions??? thanks a lot bruno

November 24, 2006, 11:23	Re: overflow problem	#2
Johnny Guest Posts: n/a	Yes, your problem is probably a bad mesh and/or an inadequate timestep. There's no way to know for sure with the information you provided.

November 26, 2006, 17:28	Re: overflow problem	#3
Glenn Horrocks Guest Posts: n/a	Hi, Doing a LES simulation when you have not got the basics under control is a bad idea. I recommend you switch to a RANS turbulence model (SST or k-epsilon). Glenn Horrocks

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