任意物質の圧縮性熱対流が計算できる数値解法(流体工学,流体機械)

概要

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A numerical method for simulating compressible thermal convections of arbitrary substance is presented. The numerical method is based on the preconditioning method proposed by the authors. This method is coupled with a database of thermochemical properties, PROPATH, developed by Kyushu University. Since PROPATH has accurate thermochemical models for 48 substances, the present method can calculate flows of such substances accurately. Also PROPATH can be used for not only substances in a gas state but also those in liquid and supercritical states. In this paper as numerical examples, natural convections in a square cavity for several substances, such as carbon dioxide, water, nitrogen, methane and helium are calculated assuming gas and liquid conditions and the calculated results are compared with the existing numerical results and with each other. Especially, the natural convection of water liquid near 4℃ is calculated and the anomalous convection is captured and the results are compared with the existing numerical and experimental results.
社団法人日本機械学会の論文
2008-10-25