Supersonic compression-ramp flow

Abhishek · April 9, 2009, 15:27

Hi everyone,
i've been trying to simulate the supersonic ciompression ramp flow on fluent. Although i was able to get the steady(mean) values of the parametes (pressure, etc) right, i'm unable to replicate intermittent pressure signal near the compression corner (shock/BL interation).
till now i've tried using the spalart allmaras model only.

I wonder if anyone here has ever tried it before could help me with this.

thanks
abhishek.

sophie-l · April 9, 2009, 16:10

Hi
The problem with spalart allmaras is that it is 1 equation so it have big problems to accomodate with high gradients
try using density based solver (in place of pressure based)

Abhishek · April 10, 2009, 07:25

hey sophie! thanks for replying. All this time i've been using density based SA model only. i guess RANS would do better! I'll try that now.

bharathikvl · June 14, 2017, 12:41

Quote:

Originally Posted by Abhishek

Hi everyone,
i've been trying to simulate the supersonic ciompression ramp flow on fluent. Although i was able to get the steady(mean) values of the parametes (pressure, etc) right, i'm unable to replicate intermittent pressure signal near the compression corner (shock/BL interation).
till now i've tried using the spalart allmaras model only.

I wonder if anyone here has ever tried it before could help me with this.

thanks
abhishek.

hello sir
please can u help me studying this model,
how you compare/validate this model
please ping me on bharathikvl@gmail.com

thank you

April 9, 2009, 15:27	Supersonic compression-ramp flow	#1
Abhishek New Member Abhishek Kaushal Join Date: Mar 2009 Posts: 2 Rep Power: 0	Hi everyone, i've been trying to simulate the supersonic ciompression ramp flow on fluent. Although i was able to get the steady(mean) values of the parametes (pressure, etc) right, i'm unable to replicate intermittent pressure signal near the compression corner (shock/BL interation). till now i've tried using the spalart allmaras model only. I wonder if anyone here has ever tried it before could help me with this. thanks abhishek.

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April 9, 2009, 16:10		#2
sophie-l New Member sophie Join Date: Apr 2009 Posts: 8 Rep Power: 17	Hi The problem with spalart allmaras is that it is 1 equation so it have big problems to accomodate with high gradients try using density based solver (in place of pressure based)

April 10, 2009, 07:25		#3
Abhishek New Member Abhishek Kaushal Join Date: Mar 2009 Posts: 2 Rep Power: 0	hey sophie! thanks for replying. All this time i've been using density based SA model only. i guess RANS would do better! I'll try that now.