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Numerical study on the influence of top and valley shape of the transverse groove on the drag reduction rate

Li Zhiping, Zuo Yueren, Lu Hanan, He Long, Meng Bo

Journal of Theoretical and Applied Mechanics

2023

Vol. 61 nr 4

741--754

This study investigates the drag reduction effect and mechanism of modified transverse grooves by employing “Constant Width” and “Constant Height” filleting methods on the top and valley of two-dimensional transverse V -shaped grooves. Results revealed a significant increase in the total drag reduction rate, from 13.29% to 23.24%, when a constant width fillet was applied to the grooves top at r3 = 0.3/p2mm. However, minimal or negative effects were observed in other cases. These findings establish a preliminary theoretical basis for future transverse groove design and processing.