Investigation of the Entropy Generation in Annular Two-Phase Flow with DragReducing Polymer

It is convenient method to use a drag-reducing polymer to reduce entropy generation in annular two-phase flow. The drag-reducing polymer is a high molecular weight poly-alpha-olefin. In present paper for the first time, the explicit equation has been presented for the prediction the entropy generation in annular flow with drag-reducing polymer. The equation is function of the pipe diameter and superficial velocities. Entropy generation versus drag-reduction and holdup in different pipe's diameter (0.0127, 0.0254 and 0.0953 ) and in different superficial velocities are presented. The results are shown that entropy generation decreases with increasing , and pipe diameter but entropy generation increases with increasing gas and liquid superficial velocities. Therefore by adding drag-reducing polymer and correct determination of pipe diameter and superficial velocities using the presented explicit equation in this research, could be reduced the losses and increased in the production in related industries.