Numerical simulation of flow around a sphere moving through a stratified fluid

Flows generated by submersed bodies in stratified fluids have been investigated in numerous experiments and numerical simulations. Numerical simulations are focused in the far-wake region, where computational costs prohibit including the explicit computation of the flow around the sphere. Initial conditions for such far-wake simulations are constructed using information gathered from experimental results of the near-wake properties, but these initializations lack full information about the density field. We present results of numerical simulations that explicitly include the sphere in the computational domain over a range of Reynolds numbers and Froude numbers. The simulations are compared with existing experimental and numerical data. In particular, turbulent simulations using the Spalart-Allmaras DES method are included along with comparison of experimental data collected at USC for Re=5000 and Fr=4.