近年来对于水下条纹沟槽表面减阻的研究多集中在试验方面，理论分析和数值计算进行的却不多。
The researches of drag reduction by grooved surface in water are mostly concentrated in experimentations recently, and researches in theory and numerical calculation are lacked.
近年来对于水下条纹沟槽表面减阻的研究多集中在试验方面，理论分析和数值计算进行的却不多。
The effects of the tip shape of V-groove on drag reduction and flow field characteristics by numerical analysis;
本文在试验方面详细研究了膏溶角砾岩的膨胀和力学特性，建立了膏溶角砾岩的膨胀模型和水损伤模型；
To sum up, the swelling characteristics and the mechanical properties of gypsum breccia are detailedly studied through experiments. The swelling models and the water damage model are established.
应用推荐