Author(s)

W.-Q. Lu & K. Xu

Abstract

A multiscale computational method couple dual reciprocity boundary element method (DRBEM) with finite volume method (FVM) is developed, and used to numerically simulate the hydrothermal gasification and evaporation of micrometer scale particles in two-phase flow. The engineering applied background of the problems include: hydrogen production from biomass in supercritical water, water mist fire suppression, etc. Numerical results shows the multiscale computational method coupled DRBEM with FDM is credible and effective. This paper also presents some valuable numerical results for these engineering problems. Keywords: multiscale computational method, DRBEM, FVM, hydrogen production by biomass, water mist fire suppression. 1 Introduction The two-phase flow with evaporation and gasification process of micrometer scale particles occurs in some engineering and scientific problems. The hydrogen production process by biomass particles is implemented in the column reactor with electric heating wall. The uniform mixture of supercritical water and biomass particles continuously flows into the reactor. Hydrogen and other flammable gases are produced by the hydrothermal gasification of biomass particles. There exist complex process of two phase flow，heat transfer and hydrothermal gasification of biomass particles. The process of water mist fire suppression is that micrometer scale water droplets are jetted into high

Keywords

multiscale computational method, DRBEM, FVM, hydrogen production by biomass, water mist fire suppression.