The present study numerically describes the nature of the arising boundary layer along an isothermal vertical plate, on which is mounted a bluff body. The investigation parameter is the cross-section shape of the bluff body, which includes a square, circular, and prismatic cylinders. To entirely embedded cylinder in the incoming boundary layer, the simulations include short cylinders with an aspect ratio fixed to unity. The cylinder location related to the leading edge of the plate is identified by considering laminar Grashof number, which experimentally is investigated in parallel work. Besides this, the experimental study of a square cylinder, confirms the reliability and accuracy of numerical simulation. As a result, by providing steady-state simulation, the presence of a complex vortex structure is proved. Besides, the effects of the cross-section shape of the cylinder on the dynamics characteristics of the vortex system include vorticity strength, size, and position are categorized. Finally, the significant effects of formed juncture flow on the three-dimensional thermal characteristics of arising free convective boundary layers along with the heated vertical plate are emphasized by a description of heat transfer coefficients. In particular, the importance of the frontal bluntness of cylinder in the field of thermal management is claimed, where the maximum value of the heat transfer coefficient for circular, prismatic, and square cylinders, respectively appears at the angular coordinates of$0$, $45$, and $90$ degrees, which correspond with the location of cylinder edges.

本研究从数值上描述了沿着等温垂直板出现的边界层的性质，在等温垂直板上安装了阻流体。研究参数是钝体的横截面形状，包括方形，圆形和棱柱形圆柱体。对于完全嵌入到传入边界层中的圆柱体，模拟包括纵横比固定为1的短圆柱体。通过考虑层流Grashof数来确定与板的前边缘相关的圆柱位置，并在平行工作中进行实验研究。除此之外，对方形圆柱的实验研究证实了数值模拟的可靠性和准确性。结果，通过提供稳态仿真，证明了复杂涡旋结构的存在。除了，圆柱横截面形状对涡流系统动力学特性的影响包括：涡流强度，大小和位置。最后，通过描述传热系数，强调了形成的接缝流对产生的自由对流边界层以及加热的垂直板的三维热特性的显着影响。特别地，要求保护气缸的前钝度在热管理领域中的重要性，其中圆形，棱柱形和方形气缸的传热系数的最大值分别出现在圆柱的角坐标处。传热系数的描述强调了形成的接缝流对与加热的垂直板一起产生的自由对流边界层的三维热特性的显着影响。特别地，要求保护气缸的前钝度在热管理领域中的重要性，其中圆形，棱柱形和方形气缸的传热系数的最大值分别出现在圆柱的角坐标处。传热系数的描述强调了形成的接缝流对与加热的垂直板一起产生的自由对流边界层的三维热特性的显着影响。特别地，要求保护气缸的前钝度在热管理领域中的重要性，其中圆形，棱柱形和方形气缸的传热系数的最大值分别出现在圆柱的角坐标处。$0$， $45$， 和 $90$ 度，与圆柱边缘的位置相对应。