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-   -   CFD Analysis on Shock/Boundary Layer Interacton'-HELP (http://www.cfd-online.com/Forums/main/1590-cfd-analysis-shock-boundary-layer-interacton-help.html)

Mujahid S. Suhaeb November 30, 1999 06:48

CFD Analysis on Shock/Boundary Layer Interacton'-HELP
 
Dear Sirs/Madame

Does anyone would like to share an idea or information about Shock/Boundary Layer Interaction Control by CFD Analysis. What I would like to know is such code commercially available? or developed or under developing by someone and possibility to procure the code?. I also invited anyone to discuss about Shock/Boundary Layer Interaction. I am actually preparing Research Proposal and I am very interesting to know more about this subject in depth--specially in CFD Analysis.

I'll appreciate for any responses

Best Regards, M.S.Suhaeb

X. Ye November 30, 1999 09:11

Re: CFD Analysis on Shock/Boundary Layer Interacton'-HELP
 
I am very interested in this topic. As I know, the existing commercial codes can not solve this problem.

X. Ye

clifford bradford November 30, 1999 19:17

Re: CFD Analysis on Shock/Boundary Layer Interacton'-HELP
 
the shock boundary layer problem is a typical test case for turbulence model developers (pressure gradients) and adaptive mesh code developers (resolution of sharp gradients). quite a bit of work has been done in this area and i'd say that some commercial codes could probably handle the problem as well as most research codes could. i'd suggest you look for commercial/research codes with adaptive mesh generation and advanced turbulence models. a search if aiaa literature would probably reveal some papers on the subject

Mujahid S. Suhaeb November 30, 1999 22:23

Re: CFD Analysis on Shock/Boundary Layer Interacton'-HELP
 
Thank you for prompt responses. The problem is that I dont have enough experiences on CFD,but alot of experience in experimental works. I have an agreement with my Advisor to do such as subject (SBLI Control), but I am much aware that before I come to the experimental one I had to work first analytically such as making CFD prediction, analysis, etc. I am very beginning in CFD I am just worry that I had to spend much of my research period just to learn about CFD works on SBLI; it may takes more than 1 year. So I think that I may probably get as much as possible information about CFD works about this subject from the people who are now doing research on this or CFD works that had been completed. I want actually procure such a source code; maybe the case and the model is not exactly similar, but at least I could study from their cases. Does any one would like to quote/offer me such a source code?. Is it ok to do research directly to experimental works without firstly making CFD works?

regards, suhaeb

John C. Chien November 30, 1999 22:40

Re: CFD Analysis on Shock/Boundary Layer Interacton'-HELP
 
(1). I think, you can try to find a commercial code using the density based formulation within your budget first. The pressure based formulation is not ideal for the shock wave calculations, although it may have the limited capability. (2). As long as the study is limited to the 2-D boundary layer interaction problem ( with surface suction control), I think, it is still practical to obtain solution with good resolution. (3). If you are interested in the code itself, one year is probably not enough for you to make any change in turbulence modeling, or improvement in numerical scheme.

clifford bradford November 30, 1999 23:07

Re: CFD Analysis on Shock/Boundary Layer Interacton'-HELP
 
i don't think you need to do CFD to go with your research project. your question seems ironic considering that only a few years ago the question was can you do CFD without experimental work to go with it. you can probably fing someone doing cfd research in this area who can collaborate with you. they'll probably appreciate your experimental work because not a lot of experiments are being done in this area.

Mujahid S. Suhaeb November 30, 1999 23:35

Re: CFD Analysis on Shock/Boundary Layer Interacton'-HELP
 
1. O.k Thanks, I'll try to find find a commercial code using the density based formulation. 2. the case of the research would be 3D, Swept, and Transonic; and the controls may probably by active methods or combining some passive methods that have been developed previously. Any idea about this?. 3. I am not really interested how to make such a code, what I am interested is to understand and how to run the code; I may probably ask someone-consulting firm probably-- to develop such a code based on my research requirement. One year would probably long enough to just understand and to implement the code. The idea is--at the end of the research--to compare the CFD asessment to the experimental one. Is this sound?

John C. Chien December 1, 1999 00:44

Re: CFD Analysis on Shock/Boundary Layer Interacton'-HELP
 
(1). I think it is reasonable. (2). Assuming that the computer resources is not a problem, then the difference between 2-D and 3-D is not much. This is important because the commercial CFD code will have a lot of overhead which tends to require a lot of RAM memory. (especially if the code is written for unstructured mesh.)

Doug December 1, 1999 18:14

Re: CFD Analysis on Shock/Boundary Layer Interacton'-HELP
 
Try the WIND code sponsored by the NPARC Alliance (NASA and AEDC). Its free to U. S. citizens. Check it out at http://www.arnold.af.mil/nparc/


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