How to capture First shock cell?

Savvy · August 11, 2022, 03:03

Hello.
I'm simulating compressible Sonic jets. I'm using RKE turbulent model for this. RKE model has been showing promising results. When validating with my experiments using centreline pressure decay plots, I noticed the first shock is not captured i.e. the plot shows a straight line (no total pressure gradient) upto certain distance downstream of exit. Rest of the plot holds good with the experimental findings.
I tried adapting the mesh also, but couldn't capture the sharp gradients as was observed in experiments.

Is there any way to solve this?
Thank you.

AlexanderZ · August 11, 2022, 03:21

decrease the size of mesh in region you are interested in
I don't know any other way

August 11, 2022, 03:03	How to capture First shock cell?	#1
Savvy New Member Join Date: Jul 2022 Posts: 3 Rep Power: 4	Hello. I'm simulating compressible Sonic jets. I'm using RKE turbulent model for this. RKE model has been showing promising results. When validating with my experiments using centreline pressure decay plots, I noticed the first shock is not captured i.e. the plot shows a straight line (no total pressure gradient) upto certain distance downstream of exit. Rest of the plot holds good with the experimental findings. I tried adapting the mesh also, but couldn't capture the sharp gradients as was observed in experiments. Is there any way to solve this? Thank you.

August 11, 2022, 03:21		#2
AlexanderZ Senior Member Alexander Join Date: Apr 2013 Posts: 2,363 Rep Power: 34	decrease the size of mesh in region you are interested in I don't know any other way Savvy likes this. __________________ best regards ****************************** press LIKE if this message was helpful

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