Two-Phase (Solid-Liquid) Flow in Inclined Pipes

Abstract

This paper presents an experimental research about the behavior of two-phase flows in inclined pipes. The inclination angle varied from 5° to 45° and the slurry solid concentration varied up to 15%. It was concluded that the head losses of the downward sloping pipe flow are always lower than the head losses of the horizontal flow and these are always lower than the head losses of the upward sloping pipe flow, regardless the concentration and inclination angle. It was possible to develop empirical equations to calculate the head losses of the horizontal flow and the upward and downward sloping pipe flows

Theoretical analysis of hydromixture transport

“…The motion of a homogeneous fluid in such a case, with the characteristic of changing its velocity, has been particularly analyzed in the basics of hydraulics. Some authors have adopted common principles of procedures for describing the flow description of the hydromixture velocity change after the pump stop (Gorkin et al, 2010;Coiado et al, 2001;Mihajlovic et al, 2018). In these considerations, a decrease in the velocity of the stream from the value arising from the constant motion of Vm to the value of 0 was analyzed, and then again an increase in the velocity in the direction opposite to the direction of movement and the occurrence of the hydroimpacts occur.…”