第４部門②

[2D05-08-04] Stokes Number Dependency of Particle Impaction Efficiency on Cylinder Surface under High
Reynolds Number Condition

*Yasuo HATTORI¹, Yuma HASEBE², Hitoshi SUTO¹, Keisuke NAKAO¹, Shuji ISHIHARA² (1. Central Research Institute of Electric Power Industry, 2. Denryoku Computing Center, Ltd.)

Keywords:Large-eddy Simulation, Turbulence, Multi-phase Flow, Wake Flow

We performed large-eddy simulations for turbulence flows with particles around a cylinder under high-Reynolds number conditions, especially paying attention to changes in particle impaction efficiencies on the cylinder surface with Reynolds and Stokes numbers. The Reynolds number effects on the efficiencies at the front side is neglectable, while the efficiencies essentially increase with the Stokes number. On the other hand, the impaction efficiencies at back side takes maximum values against the Stokes number with gradually increasing with Reynolds numbers; this is due to complicated flow patterns near the cylinder surface in the wake region under high Reynolds number conditions.