Modelling of stratified fluid flows around bodies of revolution on the basis of the vortex added-mass (LCS) method

Abstract

Density homogenous and non-homogenous fluid flows around a sphere or ellipsoid of revolution at high Reynolds and Froud numbers are studied on the basis of the vortex added-mass (LCS) method. The stratification influence upon the flow structure, shape of turbulent wake, dynamics of internal waves and integral characteristics of bodies are investigated. It has been shown that for the flow around a sphere located in the pycnocline the width of turbulent wake decreases and two types of waves are generated depending upon the internal Froud number values. In case of flows around an ellipsoid located under the pycnocline, short non-regular waves are produced and the drag force increases.