Elyyan

November 19, 2003 18:18 
Natural Convection
Hi, I am trying to simulate natural convection within enclosure using Fluent, my Ra is ~10^10 (which means it is fully turbulent), I have been trying to make it work for a while. I am using the Ke model for modeling visc flow, and I am enabling the bouyance effects option, I have tried to use different radiation models, my medium is a gas with absorbtion coeff. 0.14 cm^1, and my enclosure height is 50 cm. I made my mesh very fine, I used a BL with the first row of 0.01 cm height with growth factor of 1.2, and I have generated 40 rows, I think this should do it. Could you please help me making this simulation work, because I have been trying to make it work for a while now. If possible could you give me advice on what turbulent model to use, and if there are any options that I need to activate. Also, what do you suggest for the radiation model, and what solution schemes should I use, first order, PRESTO ... To tell the truth I will be grateful for any information you give, and I will appreciate all the details you provide. Thanks alot in advance
