Buoyancy-driven flows were investigated inside an enclosure with an inner cylinder embedded within it. The square enclosure contains the power law fluids. The effects are reported for the position of the cylinder along the horizontal and diagonal directions on the flow and thermal characteristics based on a rigorous unsteady numerical analysis. The cylinder was placed at several locations along the diagonal near the top-left corner, the center, and near the bottom right corner. The cylinder was also placed along the horizontal centerline near the right wall. This paper reports the effects of shear thickening and thinning fluids on the heat transfer mechanism in the enclosure. The thermal characteristics were more pronounced when the cylinder was near the bottom right corner than when near the top left corner and at the center. Pseudoplastic and dilatant fluids can be used in applications requiring increased and decreased heat transfer rates, respectively.

浮力驱动的流动在一个内部装有内圆柱的外壳内部进行了研究。方形外壳包含幂律流体。根据严格的非稳态数值分析，报告了气缸沿水平和对角线方向的位置对流动和热特性的影响。将圆柱体沿对角线放在左上角，中心和右下角附近的几个位置。圆柱体还沿着右壁附近的水平中心线放置。本文报道了剪切增稠和稀化流体对机壳内传热机制的影响。当圆柱体位于右下角附近时，比靠近左上角和中心时的热特性更为明显。