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-   -   High Mach number fluent. (http://www.cfd-online.com/Forums/fluent/97366-high-mach-number-fluent.html)

dsn2491 February 15, 2012 14:08

High Mach number fluent.
 
I am having problems in simulating M=2.8 flows in fluent. can someone tell me the general guidelines to follow while carrying out such high mach number calculations?

Thank you

dsn2491 February 15, 2012 14:23

i would be really thankful if someone helps...please help needed...urgent!!!

heidar February 15, 2012 16:12

comperesible flow
 
hi
you shuold firstly use the compresible flow, you shuld be care about avoiding coarsening mesh in complicated curve flow which conduct the flow behaviour to enforce adverse pressure.

arungovindneelan February 15, 2012 23:33

mach 2.8
 
You can get a good result in mach 2.8.
Make sure that your mesh is good.
Try to use fine mesh in shock area.
Use density base calculation
you can capture exact shock location with micron size mesh at the shock area!(otherwise you will get a thick shock)

dsn2491 February 16, 2012 13:16

i am performing a shock tube simulation to be specific and there seems to be some problem from the start of the calculation. the set values drop down to a vry low value.

courant number,mesh size or anything else that i need to take care of?

arungovindneelan February 17, 2012 11:59

Quote:

Originally Posted by dsn2491 (Post 344804)
i am performing a shock tube simulation to be specific and there seems to be some problem from the start of the calculation. the set values drop down to a vry low value.

courant number,mesh size or anything else that i need to take care of?

I haven't simulate a shock tube simulation. But i simulate a external flow supersonic simulation. I can't get your words. Please explain clearly.


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