NUMERICAL PREDICTION OF SALTATION VELOCITY FOR GAS-SOLID 2-PHASE FLOWIN A HORIZONTAL PIPE

By a numerical simulation, the saltation velocity at which the total p ressure drop per unit length along a horizontal pipe becomes a minimum for coarse particles is predicted relative to the gas velocity for a given mass flow rate of particles. The Lagrangian approach is used for the particle motion, and the presence of particles is considered as a particle source term in the Reynolds equations for gas flow. The pred iction by the present simulation is quantitatively similar to measurem ents done by several researchers.