B204 サーマルキャビティ問題における熱流体差分格子ボルツマンモデルの境界条件に関する考察(LBM・LGAによる流体解析)

概要

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Two methods of boundary conditions which can be applied to a thermal FDLBM model were studied and evaluated on the thermal cavity problem. First method, called "control node method", can handle a wide variety of boundary conditions and showed an excellent performance on the test. The structure is slightly complicated and it seems rather tedious to make a computing software. Natural convection is quite sensitive to boundary conditions and accurate boundary method is a must. Second method, called "extrapolation method" is, so to speak, a simple version of boundary condition. Making a computing software is quite easy and the performance is assured to some extent. It is a viable method if it is not required strict accuracy.
2001-11-14