自然対流が支配的な流れに対する数値解法

概要

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A numerical solution method for flows dominated mainly by natural convection is proposed in this study. This method takes into account the dependence of fluid density on its temperature. Although the calculation of the velocity and the pressure fields is separated from that of the temperature field, this method is devised so as to yield a similar solution to one obtained by solving the three fields simultaneously. In order to examine the usefulness of this method, comparisons between a method based on Boussinesq approximation and this method were carried out for natural convection of water in a confined region. These comparisons made it clear that this method gives better results than the other when the temperature variation in a space is large or the dependence of the density on the temperature is nonlinear. Rapid-transient natural convection was also analyzed with the present method and Sha et al. 's method. It was confirmed that there was a difference between the solutions of the two methods.
社団法人日本機械学会の論文
1991-06-25