室内外等温乱流場におけるSIMPLEC法の計算安定性に関する考察

概要

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Computational fluid dynamics for analysis of the indoor/outdoor flow distribution becomes one of the main design techniques in the environmental engineering field. As a numerical solution of the flow in the design stage, there are many cases in which SIMPLE Algorithms has been adopted from the engineering practicability. In SIMPLE Algorithms, the relaxation coefficient has been introduced in order to stabilize the calculation. However, the applicable range of relaxation factor in the flow field has not been clarified. So, it seems to be possible to avoid unnecessary trial and error, if the guideline for applicable range is obtained. In this study, we examined that the calculation stability effect of relaxation factor in SIMPLE and SIMPLEC on two- or three-dimensional isothermal flow fields. The results of simulation confirmed that SIMPLEC is correspondent to the case in which the relaxation factor of SIMPLE is optimized, and the applicable range of relaxation factor in SIMPLEC was clarified.
2002-05-30