要約

The present paper predicts the numerical pressure drop in air−solid two-phase flows in a horizontal pipe with an internal diameter of 30 mm using four-way coupling. In four-way coupling, the dispersed-phase collisions are the significant momentum exchange mechanism. Using the present model, the predicted pressure drop in the two-phase flows is in satisfactory agreement with the published experimental data. It is observed that the pressure drop increases with an increase in the solids volume fraction, particle density, particle diameter, and inlet air velocity for particle diameters up to 50 µm. Finally, using nonlinear regression analysis, a correlation for the two-phase pressure drop is developed with an accuracy of ±10%. The correlation can be used to find the two-phase pressure drop in air−solid flows.