【摘要】：采用格子Boltzmann方法,對4個壁面均為低溫、低濃度,內(nèi)置高濃度發(fā)熱圓的充滿均勻多孔介質(zhì)的方腔內(nèi)雙擴散自然對流現(xiàn)象進行了數(shù)值模擬研究.分析了Darcy(達西)數(shù)Da(10-4≤D_a≤10~(-2))和浮升力比B(-5.0≤B≤5.0)對內(nèi)部發(fā)熱圓表面平均Nusselt(努賽爾)數(shù)Nuav和平均Sherwood(舍伍德)數(shù)Shav的影響.模擬結(jié)果表明:除B=-1.0時,Nu_(av)和Sh_(av)隨D_a的增加而增大;當(dāng)-5.0B5.0,在D_a=10~(-4)時,Nu_(av)和Sh_(av)幾乎不受B變化的影響;在Da=10~(-3)和Da=10~(-2)時,Nu_(av)和Sh_(av)隨B的增加先減小后增大,在B=-1.0時取得最小值.
[Abstract]:By using lattice Boltzmann method, the double diffusion natural convection phenomenon in a square cavity filled with homogeneous porous media with low temperature, low concentration and high concentration heat is studied numerically. The effects of Darcy (Darcy) number Da (10-4 鈮，

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