Gas-solid flows in pipes are common in industrial applications, such as pneumatic conveying, fluidized beds, pulverized coal combustion, spray drying and cooling, etc. The prediction of the pressure drop is essential in design of the systems, while the addition of granular particles to the gas flow causes an enhancement of heat transfer from the heated wall to the bulk fluid. The fully developed and overall pressure drop and overall heat transfer prediction in gas-solid flows in horizontal pipes have been investigated numerically using the Eulerian-Eulerian (E-E) approach, accounting for...