[Abdullah.mohamed1989]

Hi ,how are you ?
actually im beginner in using ansys fluent i just read alot of tutorials and i have problem in doing simulation of my case its free convection laminar flow in cavity ...its a 2D ,rectangle ,inlet from bottom ,outlet from top ( the flow is up ward) the fluid is air , also the left and right as a wall have a constant temp ( have the same temperature ) between the two wall have a heat source reject the heat to the space between left and right wall by free convection ..the density should be change with temperature and should add a very small value for velocity as a trigger to start the solution .....does any one have a tutorial or advise to me on what should i set the boundary condition and the setting for the case to reach the solution ....
thank you so much
Regards

[misagh]

There are lots of information about boundary condition in fluent's tutorial. You can get it just by searching some keywords.
Your question is not well defined? What is your problem?

[Abdullah.mohamed1989]

Originally Posted by misagh

There are lots of information about boundary condition in fluent's tutorial. You can get it just by searching some keywords.
Your question is not well defined? What is your problem?

actually i want to do 2D simulation for wire tube condenser located between two walls ( refrigerator wall and room wall ) based on that i draw my geometry i just follow a simulation which is done by some one before 7 years i want to calibrate my work before i start with mine so i do like what he did ( boundary condition in the picture bellow)Screenshot001dd.jpg
i do the input exactly as he mention but i didnt get the same distribution of temperature in the contour ..the temp of walls is the same like input from the bottom and the tube condenser have temp value about the double from the inlet
this is all the problem ...the flow is free convection upwind due to buoyancy force and different between the temp or tube and the inlet temp and also the walls temp ,the flow happened due to variable density .... what i want to ask is that should i assume the case as pressure based is it okey can work in this case ??? second is it recommend to chose pressure inlet or velocity inlet as he mention in the picture ????cuz he used velocity as a trigger to solve ...
thank you so much

[Abdullah.mohamed1989]

any one have any idea about my problem please ?????help.....help