Modelling of pipe bend erosion by dilute particle suspensions

Numerical Analysis of Flow Erosion on Sand Discharge Pipe in Nitrogen Drilling

“…For gas-solid two-phase flow, flow erosion has been found the main reason causing the pipeline failures [5][6][7][8][9]. In nitrogen drilling, as the compressed nitrogen is continuously expanding in the rising process along the wellbore, the cuttings-carrying flow rate increases quickly and reaches the peak in the inlet of the discharge pipe.…”

The effects of wall roughness on erosion rate in gas–solid turbulent annular pipe flow

“…Since the early nineties, computational fluid dynamics (CFD) has been used for predicting the solid particle erosion in curved pipes and ducts, and various analytical, semi-empirical and empirical models were developed [8]. Edwards et al [9] used a commercial CFD code to model fluidsolid flows and added subroutines for predicting erosion due to particle impacts.…”

Numerical Simulation of Gas-Particles Two Phase Flow in Pipe of Complex Geometry: Pneumatic Conveying of Olive Cake Particles Toward a Dust Burner

“…The normal, , and tangential, , restitution coefficients are the ratio of normal and tangential velocities of the particle before and after the collision, respectively. The magnitude of e, in both directions, depends on the particle-wall material pair and the flow system [1]. In this work, empirical restitution coefficients are considered coming from the study of Sommerfeld [18] for stainless steel tubes in which relations between the coefficient of restitution and the particle glancing angle are expressed by the following equations: …”

“…The pneumatic transport of dilute suspensions of particles in gas flows through bends or elbows has many shortcomings and because of the change in flow direction [1]. One such problem is that the rope formation.…”