E311 密度成層下での漏斗状旋風のシミュレーション

概要

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Three-dimensional computation is carried out for a tornado caused by a big fire in the stratified fluid flow. In the atmosphere, the density and temperature variation along vertical direction plays a very important role. We have formulated a general method to solve a stratified fluid flow in the atmosphere. The compressible Navier-Stokes equations are modified based on the approximation that the velocity is small compared with speed of sound. In this study, these equations are solved by finite-difference method with using the difference from the equilibrium value for the pressure. The complex three-dimensional flow plofile is investigated using the large square-type heat source divided into pieces. under Coriolis force. Computational results show the flow structure clearly by the visualization.
日本流体力学会の論文
2001-07-31