Numerical simulation of transient laminar compressible convection in a rectangular enclosure

사각형(四角形) 밀폐공간내(密閉空間內)의 과도(過度) 층류(層流) 압축성(壓縮性) 자연(自然) 대류(對流)에 관(關)한 수치해석적(數値解析的) 연구(硏究)

The problem of transient laminar natural convection in compressible fluid in a rectangular enclosure is considered. The upper and lower boundaries of the enclosure are thermally insulating and the side boundaries are maintained at fixed temperatures. The fluid is considered to be a perfect gas with constant viscosity and thermal conductivity and the formulation differs from the boussinesq simplification in that the effects of variable density are completely retained. The motions are restricted to two dimensions. For incompressible fluid, the natural convection is driven mainly by buoyancy force. But the solutions show that for compressible fluid, the natural convection is driven by pressure and buoyancy forces and the thermally induced motion is acoustic in nature.