2023 Volume 79 Issue 15 Article ID: 22-15047
We performed large-eddy simulations for turbulence flows with particles around a cylinder under high-Reynolds number conditions. After validation and verification through comparison with existing studies under ideal flows, we examined changes in particle impaction efficiencies on the cylinder surface with Reynolds and Stokes numbers. The Reynolds number effects on the impaction efficiencies at the front side is negligible, while the efficiencies essentially increase with the Stokes number. On the other hand, the impaction efficiency at the back side takes a maximum with respect to the Stokes number and depends as well on the Reynolds number to some extent; this is due to the formation of three-dimensional wake structures under high Reynolds number conditions near the cylinder surface in the wake region under high Reynolds number conditions.
