open cavity flow

April 9, 2005, 19:27

Hi Everyone

I am doing some numerical simulation of open cavity flow. I need some experimental data to confirm the results. Is there anyone can help me to find these two paper:

1.Heller H.H. & Bliss,D.B. 1975 "The Physical Mechanism of Flow Induced Pressure Fluctuations in Cavities and Concepts for Their Suppression." AIAA Paper 75-491. 2.Kaufman ,L.G. II, Maciulatitis, A.,and Clark,R.L., "Mach 0.6 to 3.0 Flows over rectangular Cavities" Air Force Wright Aeronautical Labs., AFWAL-TR-82-3112 May 1983

THANKS in advance

xpg

GSR · March 17, 2021, 09:12

Quote:

Originally Posted by xpg
;33831

Hi Everyone

I am doing some numerical simulation of open cavity flow. I need some experimental data to confirm the results. Is there anyone can help me to find these two paper:

1.Heller H.H. & Bliss,D.B. 1975 "The Physical Mechanism of Flow Induced Pressure Fluctuations in Cavities and Concepts for Their Suppression." AIAA Paper 75-491. 2.Kaufman ,L.G. II, Maciulatitis, A.,and Clark,R.L., "Mach 0.6 to 3.0 Flows over rectangular Cavities" Air Force Wright Aeronautical Labs., AFWAL-TR-82-3112 May 1983

THANKS in advance

xpg

https://apps.dtic.mil/dtic/tr/fulltext/u2/a134579.pdf
hope it is accessible.

alindasharma · March 28, 2024, 01:50

Hi everyone,
I am working on supersonic flow over an axisymmetric open cavity with L/D as 1.33. The problem I am facing is that I am unable to capture the oscillations at the lip of the cavity. I have tried different schemes present in SU2 but nothing is working. Please let me know what can be the solution for my problem

agd · March 28, 2024, 10:09

My first thought - your grid is not resolving the necessary physics in the lip region.

alindasharma · April 1, 2024, 01:37

Quote:

Originally Posted by agd

My first thought - your grid is not resolving the necessary physics in the lip region.

Hello Agd, I am trying to reproduce the results from the paper "Computational and experimental study of supersonic flow over axisymmetric cavities" by K. Mohri and R. Hillier. (doi: 10.1007/s00193-011-0312-4) The grid I am using is much finer than grid used in the paper. So, the grid may not be the problem.
Do you have any idea what can be other issues?

agd · April 2, 2024, 09:39

It is not clear what you mean when you say that your gird is finer than what they used - did you manage to run a grid convergence test like the paper authors did? Apart from that, you have not provided any real details. Are you trying to simulate the laminar or turbulent results of the paper? If turbulent, then my first suggestion would be to drop back and see if you can replicate the laminar results. If you are trying to simulate the laminar results and you are failing, then there is either a problem in your simulation setup (initial conditions, boundary conditions, gas properties, timestep, or mesh) or SU2 is failing in some way. I am not familiar enough with SU2 to provide any help with it. Basically you are going to have to try to break your problem down into smaller pieces and figure out where it is failing. Welcome to the wonderful world of CFD troubleshooting. It can be very frustrating but it's also how you really learn the subject.

April 9, 2005, 19:27	open cavity flow	#1
xpg Guest Posts: n/a	Hi Everyone I am doing some numerical simulation of open cavity flow. I need some experimental data to confirm the results. Is there anyone can help me to find these two paper: 1.Heller H.H. & Bliss,D.B. 1975 "The Physical Mechanism of Flow Induced Pressure Fluctuations in Cavities and Concepts for Their Suppression." AIAA Paper 75-491. 2.Kaufman ,L.G. II, Maciulatitis, A.,and Clark,R.L., "Mach 0.6 to 3.0 Flows over rectangular Cavities" Air Force Wright Aeronautical Labs., AFWAL-TR-82-3112 May 1983 THANKS in advance xpg

March 28, 2024, 01:50	Facing oscillation capturing issue in SU2	#3
alindasharma New Member alinda Join Date: Mar 2024 Posts: 3 Rep Power: 2	Hi everyone, I am working on supersonic flow over an axisymmetric open cavity with L/D as 1.33. The problem I am facing is that I am unable to capture the oscillations at the lip of the cavity. I have tried different schemes present in SU2 but nothing is working. Please let me know what can be the solution for my problem

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March 28, 2024, 10:09		#4
agd Senior Member Join Date: Jul 2009 Posts: 358 Rep Power: 19	My first thought - your grid is not resolving the necessary physics in the lip region.

April 2, 2024, 09:39		#6
agd Senior Member Join Date: Jul 2009 Posts: 358 Rep Power: 19	It is not clear what you mean when you say that your gird is finer than what they used - did you manage to run a grid convergence test like the paper authors did? Apart from that, you have not provided any real details. Are you trying to simulate the laminar or turbulent results of the paper? If turbulent, then my first suggestion would be to drop back and see if you can replicate the laminar results. If you are trying to simulate the laminar results and you are failing, then there is either a problem in your simulation setup (initial conditions, boundary conditions, gas properties, timestep, or mesh) or SU2 is failing in some way. I am not familiar enough with SU2 to provide any help with it. Basically you are going to have to try to break your problem down into smaller pieces and figure out where it is failing. Welcome to the wonderful world of CFD troubleshooting. It can be very frustrating but it's also how you really learn the subject.