Influence of the stability of boundary vortex on drag reduction induced by transverse V-groovesZhiping Li, Long He, Tianyu Pan, Yao Yin, Shaobin Li, Wei Yuan and Bo MengEur. Phys. J. E, 48 4-5 (2025) 24DOI: https://doi.org/10.1140/epje/s10189-025-00490-7