Abstract
Suspension is a fluid which is mixed with insoluble materials. The suspension's natural convection is a complicated phenomenon. The natural convection is affected by fluid temperature and particle concentration distribution, which is caused by particle sedimentation. However, the formation mechanism of the convection has not been clarified. In a previous study, the natural convection of suspension was observed in rectangular cell with a heated bottom wall and cooled side walls experimentally. In this study, the numerical analysis under the same condition was carried out. As a result, the formation and breaking of convection layers can be expressed. I was found that the boundary of convection layer is broken when the Rayleigh number of temperature at the boundary becomes larger than that of concentration.
