# I have some problem about Compressible

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 November 29, 2005, 20:15 I have some problem about Compressible #1 Cruger Guest   Posts: n/a I doo my research about jet flow that have velocity inlet about 300 m/s and temp inlet about 900 Kelvin. My model is still on 2D. I set the top edge to be wall and outlet to be pressure outlet but it's not work. Do u have some tecnique to tell me? Please I know this maybe easy for u but I just use Fluent program for the first time... Hope to see ur reply

 November 30, 2005, 03:51 Re: I have some problem about Compressible #2 Ahmed Guest   Posts: n/a 1- What do you mean by "I set the top edge to be wall" a wall is a wall, with no slip boundary condition. 2- If this is your first time using FLUENT, it is a good idea to start by some tutorials?

 November 30, 2005, 05:52 Re: I have some problem about Compressible #3 Cruger Guest   Posts: n/a Anyway, I asked my supervisor for some advices but I get quite not good result. I used Coupled Solver. 2 I enabled energy eqn. 3 I chose K-epsilon 2eqn+Reallizable 4 I chose Ideal gas of air. 5 It's quite difficult to explain my geometry but It's so basic. 6 I started courant number(Solution Controls) at 0.5 7 when I run it, I think I got a not good result. Please Help me!!! leave me ur e-mail, I will send picture of geometry to u. But u have any advices, don't hesitate to post it. , Cruger

 December 1, 2005, 10:52 Re: I have some problem about Compressible #4 Bob Guest   Posts: n/a Try to use mass flow or pressure inlet.

 December 5, 2005, 08:05 Re: I have some problem about Compressible #5 Mahesh Masurkar Guest   Posts: n/a ya, use Pressure inlet. Assuming Ma=1 at the inlet, give Po & To. Put a very fine mesh in the jet region. Use low relaxations for pressure.(0.1-0.15). Hope this will solve ur issue.

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