The flow of a combustible gas in a horizontal pipe

Abstract

The flow of high temperature combustible gas in a horizontal pipe is studied as a model for a biomass moving bed gasifier. The general problem is a fully developed flow in a pipe in the presence of free convection heat transfer. When the flow Reynolds number is low, asymptotic solutions are developed. Several limiting solutions are developed for the basic nonlinear approximation. The higher approximations are linear and are tackled analytically and by a finite difference scheme employing central differences. The results are discussed quantitatively.