CFD investigation for gas–solid flows in a horizontal pipe was performed using Euler–Euler
approach or two-fluid model and accounting for four-way coupling. Calibration of the
numerical model is obtained by confirming the numerical predictions with published
experimental data. Based upon the axial profiles of the pressure gradient, the authors
investigated the acceleration length for different particle properties and loadings. It is found
that acceleration length increases generally with increasing particulate loading and/or …