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Old   April 16, 2000, 15:12
Default CUSP scheme
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When the CUSP scheme is used with first and third order dissipation terms, like in the jamesons scheme, which switch gives the best performance? the Baldwin-Lomax pressure switch doesnt seem to be the best one to use. thanx.
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Old   April 20, 2000, 06:32
Default Answer my question!
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Answer my question!
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Old   April 20, 2000, 09:45
Default Re: Answer my question!
Patrick Godon
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Not all the people here are Gurus of CFD, and most of us are specialized in a specific field, using a given method, software to solve a given flow problem. So if nobody answers your question, it means that till now none was able to. Just be patient, untill the right person will have a look at your posting. You might also want to consider giving more details on your flow problem, numerical method and problem, etc... This might help people not specialized in your area to give you some hint, etc...


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Old   April 20, 2000, 11:13
Default Re: Answer my question!
John C. Chien
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(1). I agree with you. You are 100% correct. (2). The reason why no one is answering the question is because no one understands or aware of this CUSP scheme, including me. (3). I was curious enough to look into it. Since some professors have been known to create new names for numerical techniques they invent, the shortest distance to the answer is to check the AIAA Journal in the library, which is only about 100 yards away in the same building. (4). The first paper I found explicitly related to this subject was " Aerodynamic Computations Using the Convective-Upstream Split-Pressure Scheme with Local Preconditioning". (5). The abstract says" The inplementation of the convective-upstream-split-pressure(CUSP) approach to numerical dissipation is presented......An inexpensive flux limiter is used to blend the low- and high-order CUSP dissipation to capture shocks without oscillations....." In other words, this is a new numerical dissipation scheme, trying to capture the shocks (discontinuity). (6). The paper is presented by M.Nemec and D.W Zingg of the University of Toronto, on AIAA Journal VOl.38. No.3,Page 402-410, March 2000. It also contains references to Professor Jameson (1995)and his students or associates. This is a highly technical field of inventing artificial numerical dissipation for compressible flows with shocks and discontinuities. This is the best I can do right now. Have a good trip to the library.
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Old   April 21, 2000, 09:14
Default Re: Answer my question!
Manish Jaiman
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Hi Jak,

I hope that u have enjoyed the library trip...I am fully agree with Chien and Patrick...I advice that U should avoid to ask such specific questions without going through the papers and books....Hope that u won't ask specific questions without having extensive literature survey....


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