Turbulence Model for Drag of Supersonic flow of Bullet

CRAC · April 2, 2016, 15:34

Hi all,

I was wondering if I could get some suggestions concerning which turbulence model I should use for calculating the drag of a supersonic bullet (M=1.5 to M=3). I am trying to obtain the cD value in the end...I am relatively new to ANSYS CFX, however, I do have mediocre knowledge of the theory (could at least follow your train of thought hopefully).

Please let me know what you think is best (references also much appreciated)! At this point, I am thinking of using SST...

Thanks,

Chris

ghorrocks · April 3, 2016, 07:26

I always recommend you use SST unless you know of a really good reason not to. You have not mentioned anything which discounts SST, so go with it.

April 2, 2016, 15:34	Turbulence Model for Drag of Supersonic flow of Bullet	#1
CRAC New Member Chris Join Date: Apr 2016 Posts: 2 Rep Power: 0	Hi all, I was wondering if I could get some suggestions concerning which turbulence model I should use for calculating the drag of a supersonic bullet (M=1.5 to M=3). I am trying to obtain the cD value in the end...I am relatively new to ANSYS CFX, however, I do have mediocre knowledge of the theory (could at least follow your train of thought hopefully). Please let me know what you think is best (references also much appreciated)! At this point, I am thinking of using SST... Thanks, Chris

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April 3, 2016, 07:26		#2
ghorrocks Super Moderator Glenn Horrocks Join Date: Mar 2009 Location: Sydney, Australia Posts: 17,852 Rep Power: 144	I always recommend you use SST unless you know of a really good reason not to. You have not mentioned anything which discounts SST, so go with it.