Double-diffusive natural convection in a vertical enclosure containing various solid block arrays is numerically and analytically investigated in present work, where heat and species source and sink are simultaneously attached on the walls. Rayleigh number, buoyancy force ratio, number of inner solid blocks, solid thermal conductivity and mass diffusion coefficient have been varied to observe inherent flow structures and mechanism of thermal and mass transports, regarding of different levels of solid-to-fluid volume ratios. Correlations have been presented for different flow regimes, namely thermal buoyancy driven flow and solutal buoyancy driven flow. Simulation and correlation results demonstrate that influences of thermal conductivity and mass diffusion coefficient of the solid block arrays on average Nusselt and Sherwood numbers are not evident compared with that of Rayleigh number. Furthermore, there is a positive correlation between average Nusselt number and Sherwood number. In addition, under certain values of Rayleigh number, absolute values of buoyancy force ratio close to unity will cause multiple steady solutions in pure natural convection. This research could benefit the future thermal and species management for electronics and built environment.

在目前的工作中，对包含各种固体块阵列的垂直外壳中的双扩散自然对流进行了数值和分析研究，其中热量和物质源与汇同时附着在墙壁上。考虑到不同水平的固体与流体体积比，改变了瑞利数，浮力比，内部固体块的数量，固体导热率和质量扩散系数，以观察固有的流动结构以及热和质量传递的机理。已经提出了针对不同流动方式的相关性，即热浮力驱动的流量和溶液浮力驱动的流量。仿真和相关结果表明，与瑞利数相比，固体块阵列的热导率和质量扩散系数对平均Nusselt和Sherwood数的影响不明显。此外，平均努塞尔特数和舍伍德数之间存在正相关。另外，在一定的瑞利数值下，浮力比的绝对值接近于一会在纯自然对流中引起多个稳态解。这项研究可能有益于电子和建筑环境的未来热学和物种管理。浮力比的绝对值接近于1将导致纯自然对流中的多个稳定解。这项研究可能有益于电子和建筑环境的未来热学和物种管理。浮力比的绝对值接近于1将导致纯自然对流中的多个稳定解。这项研究可能有益于电子和建筑环境的未来热学和物种管理。