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error in BEM analysis

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Old   June 27, 2001, 16:24
Default error in BEM analysis
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Hi, all. I am currently using a 3D Boudary Element code to run simulations. What I am doing is simply generating input data that defines the geometry of surface elements, then submit the task. However some results are weird. I suspect there's error induced by the mesh. However I don't have references at hand that tell me possible errors related to mesh in Boundary Element Method. Can anybody tell me the general principles to generate mesh for BEM? Thanks.
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Old   June 28, 2001, 08:57
Default Re: error in BEM analysis
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I'm affraid this is not a right forum for BEM related questions. As you may have noticed most of the participants commercial code users. Few develop FV based techniques, less FEM. Two or three do work on spectral methods. One or two work on BEM/vortex elements. Nevertheless, coming back to your question, I'd say that THE general principle of meshing for the BEM is to make sure that the node-to-node connectivity is only counterclockwise (or, sometimes, clockwise -- depending upon how unit outward normals are evaluated in the code). This is what you have to check first. Other possible errors are hard to figure out, as you have to know inside of the algorithm (I assume you are only a user). In any case, BEM is very sensitive to any kind of error in specifying the boundary conditions, mesh data, and etc.
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Old   July 8, 2001, 01:22
Default Re: error in BEM analysis
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This is Du Qiang, It's you? How are you now? Are you meet problem in BEM? Very sorry I don't understand the BEM. Anyway, if you need reference, you can tell me.
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