How to set k R and epsilonfield

fightingfalcon23 · January 21, 2009, 06:15

Hi guys,

i'm new to CFD and OpenFoam. I'm trying to build a simulation of a testfacility with 3 inlets and 2 outlets. It's build with wedges!

Now i have the problem, that I have no idea how to set the conditions for k, R and epsilon. I've read about a tutorial to calculate those values, but I can't find it.

Where can I found information about calculating them or is it possible to set empirical values?

Thanks beforehand and sorry for my bad english!

gwierink · January 21, 2009, 06:42

Hi Sebastian,

What solver are you planning to use?

Rgds, Gijsbert

fightingfalcon23 · January 21, 2009, 09:42

Hi Gijsbert,

first step I want to use rhoTurbFoam. At first with k-epsilon. After that Spallart (is this possible with a compressible solver?) and with LaunderGibsonRSTM. At last I will try to solve the problem with coodles. The intention is to compare the different kinds of turbulence modelling and the les-solver!

But at first I want to get an running kepsilon-case!

Lot of information for such a short question! Thanks for your interest!

January 21, 2009, 06:15	Hi guys, i'm new to CFD and	#1
fightingfalcon23 Member Sebastian Join Date: Mar 2009 Location: Munich, Germany Posts: 30 Rep Power: 17	Hi guys, i'm new to CFD and OpenFoam. I'm trying to build a simulation of a testfacility with 3 inlets and 2 outlets. It's build with wedges! Now i have the problem, that I have no idea how to set the conditions for k, R and epsilon. I've read about a tutorial to calculate those values, but I can't find it. Where can I found information about calculating them or is it possible to set empirical values? Thanks beforehand and sorry for my bad english!

January 21, 2009, 06:42	Hi Sebastian, What solver a	#2
gwierink Senior Member Gijsbert Wierink Join Date: Mar 2009 Posts: 383 Rep Power: 18	Hi Sebastian, What solver are you planning to use? Rgds, Gijsbert __________________ Regards, Gijs

January 21, 2009, 09:42	Hi Gijsbert, first step I w	#3
fightingfalcon23 Member Sebastian Join Date: Mar 2009 Location: Munich, Germany Posts: 30 Rep Power: 17	Hi Gijsbert, first step I want to use rhoTurbFoam. At first with k-epsilon. After that Spallart (is this possible with a compressible solver?) and with LaunderGibsonRSTM. At last I will try to solve the problem with coodles. The intention is to compare the different kinds of turbulence modelling and the les-solver! But at first I want to get an running kepsilon-case! Lot of information for such a short question! Thanks for your interest!