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greg August 25, 2006 12:06

turbulence model

can you (in few words) explain me how to use viscous models. I mean which model is proper for which problem (if it is possible to descibe in few words). I know that some of them are more time and CPU consumption. Which are the best for use with problems involving mass and heat transfer.

thank you for help

saeed August 26, 2006 05:25

Re: turbulence model
u should describe ur problem with more detailes ... what's ur geometry of ur problem .. do u use heated walls?

gladiator August 26, 2006 07:04

Re: turbulence model
1-if you have a rotational flow you must use k-omega. 2-if you have a simple flow (with a few rotation or without) :k-epsilon,rng...... 3-if you want to have the precistion you must use :rsm

in conclusion ,you must use the model of turbulence for two condition: 1-good results.

2-optimal(few cpu). best regards

greg August 26, 2006 11:07

Re: turbulence model
to saeed: I have solar radiation, mass and heat transfer, no moving parts (no rotating parts), just flow in rectangular chanel (pipe). Velocities of fluid from 0.001 m/s to 0.5 m/s. No chemical reactions

to gladiatior: thanks. This short quide is very, very, very good and useful. Meybe you know a website or have any pfd with such (simple language,good description ) tutorials of turbulence

thanky you both of you guys

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