Regimes of heat transfer in finite-size particle suspensions

We present results of interface-resolved simulations heat transfer in suspensions finite-size neutrally-buoyant spherical particles for solid volume fractions up to 35% and bulk Reynolds numbers from 500 5600. An Immersed Boundary–Volume Fluid method is used solve the energy equation fluid phase. relate regimes particle motion previously identified, i.e. a viscous regime at low number, particle-laden turbulence high moderate fraction particulate fractions. show that dominated regime, mainly due thermal diffusion with enhancement particle-induced fluctuations. In turbulent-like we observe largest global transfer, by turbulent flux. shear-thickening however, decreases as mixing quenched migration towards channel core. As result, compact loosely-packed core region forms contribution total becomes significant once again. The becomes, these flows larger than 25%, lower single phase turbulence.