D223 塩分安定成層内の熱対流(D-22 流体一般(6),一般講演)

概要

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Thermal convection in salty stratified fluid is numerically simulated in this study. The basic equations are the two dimensional incompressible Navier-Stokes equations under the Boussinesq approximation. Standard MAC method is employed to solve the basic equations. The third order upwind scheme is used for the approximation of the non-linear term so that the flow of high Rayleigh number can be simulated without turbulence models. Initially, the fluid is assumed to have several horizontal layers. In each layer, the concentration of the substance is constant although the values of the constant are different among the layers. Using this condition as the initial conditions, the computations are carried out. When a salinity gradient is heated at a single point, a hot plume is formed with a series of layers around and above it. Typical flow phenomena such as layering are well simulated in this study.
日本流体力学会の論文
2004-08-09