Study on complicated flows around bluff bodies is significant in terms of flow physics and various engineering applications. In the current paper, a simulation of the flow past an elliptical moving belt along with the Magnus effect in a transitional flow regime was performed. The angle of attack and rotational speed of the moving belt were considered as the variable parameters at a fixed Reynolds number of 10⁵ and ellipse axis ratio (minor to major diameter ratio) of 0.25. The belt motion was such that the ellipse's upper surface was moved in the same direction of the flow and the lower surface motion was in the opposite direction. The numerical simulation procedure was based on the discretization of two-dimensional Reynolds-averaged Navier–Stokes equations using a pressure-based solver. A modified version of the k-k_L-ω turbulence model with the ability to predict separation bubbles was utilized. A large eddy simulation (LES) was also performed to ensure the validity of the two-dimensional assumption and the utilized turbulence model. Results indicated that the belt motion led to a decrease in the boundary layer thickness on the upper surface and an increase in the boundary layer thickness on the belt's lower surface. Moreover, as the attack angle increased, the turbulence on the upper and lower surfaces increased and decreased, respectively. The aerodynamic analysis showed that the belt motion enhanced the lift coefficient and reduced the elliptical belt drag coefficient.

研究钝体周围的复杂流动在流动物理学和各种工程应用方面具有重要意义。在当前的论文中，对通过椭圆形运动带的流动以及过渡流态中的马格努斯效应进行了模拟。在固定雷诺数为 10 ^{5 时}，将移动带的攻角和转速视为可变参数椭圆轴比（短径比与长径比）为 0.25。带运动是这样的，椭圆的上表面在流动的相同方向上移动，而下表面在相反的方向上运动。数值模拟程序基于使用基于压力的求解器对二维雷诺平均 Navier-Stokes 方程进行离散化。k - k _L - ω 的修改版本利用了具有预测分离气泡能力的湍流模型。还进行了大涡模拟 (LES) 以确保二维假设和使用的湍流模型的有效性。结果表明，带运动导致带上表面边界层厚度的减小和带下表面边界层厚度的增加。此外，随着迎角的增加，上下表面的湍流分别增加和减少。气动分析表明，带运动提高了升力系数，降低了椭圆带的阻力系数。