AbstractGas‐particulate flow through the curved pipe is analyzed in order to study the effect of the secondary flow on the volume flow rate at given pressure gradient. It is observed that as the secondary flow through the pipe increases, volume flour rate decreases. Moreover, when the particles are fine, the volume flow rate for the clean gas is greater than the volume flow rate for gas‐particulate flow. For coarse particles, volume flow rate for gas‐particulate flow is greater than the volume flow rate for the clea