Transfer of heat or mass to particles in fixed and fluidised beds

Effects of limestone calcination on the gasification processes in a BFB coal gasifier

“…An empirical relation for the interphase heat transfer coefficient between the gaseous and solid phases was proposed by Gunn (1978) which relates the Nusselt number with the particle Reynolds and the Prandtl number, P r = Cp,gµg κg :…”

Process Modeling Phase I Summary Report for the Advanced Gas Reactor Fuel Development and Qualification Program

“…The current default Nusselt number (Nu) correlation for gas-particle heat transfer in MFIX is that by Gunn, 1978. The Gunn correlation was selected for the interim until more accurate experimental correlations developed specifically for fuels coating become available.…”

“…The default MFIX mass-transfer correlation currently used for the gas-particle Sherwood number is that developed by Gunn, 1978. The uncertainty in available gas-particle mass-transfer correlations in the literature is greater than for heat-transfer correlations, mainly because of the greater difficulty in obtaining accurate experimental measurements of the latter.…”

Transient heat transfer between a magnetocaloric packed particle bed and stagnant interstitial fluid.

“…The corresponding conduction length for this Nusselt number is D / 3.8. In close agreement with this result is a correlation by Gunn (1978). With a Reynolds number of zero, the Gunn correlation reduces to…”