Linear shear flows, forces, and heat transfer across a single and two tandem square cylinders are numerically investigated at Reynolds numbers Re = 70–150 and a Prandtl number Pr = 0.71, with the dimensionless inlet shear rate K = 0–0.2. For the two tandem cylinders, the scaled cylinder-gap spacing (S^*) is varied from 1.0 to 5.0. The flow is assumed laminar and two-dimensional. The numerical method is based on a finite-volume technique. The effects of K, Re, and S^* are investigated on the heat transfer topology, flow structures, and aerodynamic parameters including vortex shedding frequency, pressure coefficient, lift and drag forces, and Nusselt number. For the single cylinder, when K ≠ 0, the time-mean lift force is negative for Re = 70 and 100 but positive for Re = 150. The lift magnitude linearly increases with K. For tandem cylinders, employing three initial conditions for some S^* values yields two solutions linked to hysteresis (modes I and II) in the flow, forces, and heat transfer. Hysteresis is observed for S^* = 2.0–5.0 when K = 0.2 and Re = 150. Mode I turns in a smaller time- and surface-averaged Nusselt number than mode II. In general, the inlet shear has more effect on the flow around the downstream cylinder than that around the upstream cylinder.

在雷诺数Re = 70–150和普朗特数Pr = 0.71的情况下，通过一个无量纲的入口剪切速率K  = 0–0.2 ，对单个和两个串联方筒上的线性剪切流，力和传热进行了数值研究。对于两个串联气缸，缩放后的气缸间隙间隔（S ^*）从1.0到5.0变化。假定流动为层流和二维。数值方法基于有限体积技术。研究了K，Re和S ^*对传热拓扑，流动结构和空气动力学参数的影响，包括涡旋脱落频率，压力系数，升力和阻力以及Nusselt数。对于单缸，当K ≠0时，时间平均提升力对于Re = 70和100为负，而对于Re = 150为正。提升量随K线性增加。对于串联气缸，对某些S ^*值采用三个初始条件会产生两个与流量，力和热传递中的磁滞（模式I和II）有关的解决方案。 当K  = 0.2和Re = 150时，对于S ^* = 2.0–5.0观察到磁滞。模式I的时间和表面平均努塞尔特数小于模式II。通常，入口剪切对下游圆柱体周围流动的影响大于上游圆柱体周围流动的影响。