Numerical simulations are presented for three-dimensional flow and mass transfer of semi-volatile organic compounds (SVOCs) in cylindrical and semi-cylindrical shallow chambers (Chambers A and B thereafter). The effects of the Reynolds numbers, ranging from 2 to 1100, on velocity and concentration field are considered in the one-quarter domain, the half domain, and the entire domain of chambers. The results show that at low Reynolds number, the streamline and concentration distribution are unique and symmetric. When Re exceeds the critical Reynolds numbers, Re_c, asymmetric flow and mass transfer occur in Chamber A in the Y-planes and Chamber B in both the Y- and Z-planes. The critical Reynolds numbers in Chamber A and B are 952 and 1054, respectively. At Re = 1013, steady symmetric and asymmetric solutions are both obtained in Chamber A, and the asymmetric convective mass transfer coefficient increases by 1.52% compared with the symmetric result. The asymmetric convection in Chamber B decreases 3.45% of the Sherwood number than the symmetric flow. As the Reynolds number increases, the mass transfer efficiency increases in both chambers. The velocity field from the special structure of Chamber B leads to a stronger convective mass transfer.

提出了在圆柱和半圆柱浅室（此后为室A和B）中半挥发性有机化合物（SVOC）三维流动和传质的数值模拟。在腔室的四分之一域，一半域和整个域中，考虑了雷诺数在2到1100之间对速度和浓度场的影响。结果表明，在低雷诺数下，流线和浓度分布是唯一且对称的。当Re超过临界雷诺数Re _c时，在Y平面的腔室A和在Y和Z平面的腔室B中发生不对称流动和传质-飞机。A室和B室的雷诺临界数分别为952和1054。在Re = 1013时，在腔室A中都获得了稳定的对称解和非对称解，与对称结果相比，非对称对流传质系数增加了1.52％。腔室B中的不对称对流比对称流减少了Sherwood值的3.45％。随着雷诺数增加，两个腔室中的传质效率均增加。B室特殊结构的速度场导致更强的对流传质。