Parallel computing of 3D separated homogeneous and stratified fluid flows around the bluff bodies

Abstract

This chapter discusses the parallel computing of 3D separated homogeneous and stratified fluid flows around the bluff bodies. For the investigation of the 3D unsteady separated homogeneous and stratified viscous incompressible fluid flows around the bluff bodies, (sphere and circular cylinder) the direct numerical simulation is used. The classification of the 3D separated homogeneous viscous fluid flow regimes around the sphere at 200<Re<1000 is refined. The formation mechanism of vortices in the sphere wake for 270<Re<400 is examined in detail. Transitional regimes of separated homogeneous fluid flows around a 3D circular cylinder for 200<Re<400 are investigated in detail. Some examples of the Boussinesq viscous incompressible diffusive stratified fluid flows around a sphere and a 2D circular cylinder are shown in the chapter. The separated stratified fluid flows around a 2D circular cylinder for some range of Reynolds and Froude numbers (20.25<Re<113.5, 0.13<Fr<0.73) were calculated.