Near wakes behind a sphere in both homogeneous and linearly stratified background were studied numerically and experimentally at Reynolds number Re ≤ 1000, Froude number Fr ≥ 0.5. In a homogeneous fluid, the structural transitions with increasing Re are consistent with previous studies. The stratified results from simulations and experiments are in good agreement. Stratified wakes undergo simil...

To study acoustic wave propagation and the corresponding energy deposition in partially ionized plasmas, we use a two-fluid computational model that treats neutrals charged particles (electrons ions) as two separate fluids. This takes into account ion-neutral collisions, ionization, recombination, allowing us to investigate both collisional reactive interactions between uncoupled ions plasmas. ...