Numerical simulation on flow field inside the drive unit of seafloor sediment hydrostatic corer

WEI Shuang-feng, QIN Hua-wei, WANG Jian-jun
(The Institute of Mechatronic Engineering, Hangzhou Dianzi University, Hangzhou 310018, China)

Abstract: The basic structure of a drive unit of seafloor sediment hydrostatic corer was given. A model of the flow entities inside the hydrostatic corer drive unit was proposed and a mesh was gained. Based on CFD software, the flow field inside the drive unit was numerically simulated and its velocity and pressure distribution were obtained. The results indicate that the shape of the drive unit outlet has significant effects on the drainage flow, change the drive unit shape can improve the sampling efficiency of samplers, and it can be a guide for internal structure optimum designing of a drive unit and improving the efficiency of the hydrostatic corer sampling.
Key words: marine sediment; corer; hydrostatic; flow field; numerical simulation