Turbulence Modulation by Particles Having the Same Response Time

(High Stokes Number Case)

Abstract

Turbulence modulation by high-inertia particles having the same response time and same volume loading is investigated. Particles slightly larger than Kolmogorov micro-scale are released into a steady isotropic homogeneous turbulence. The magnitude of turbulence attenuation increases as the particle becomes smaller. In the small attenuation case, vortex tubes can dodge around the particles and develop. In the large attenuation case, the vortex tubes collapse and high dissipation region which is responsible for turbulence attenuation is formed near the particle surface.