Simulation of Particle Impact with a Wedge in Dilute Two-phase Flow

P.S. V.S. Sridhar; Krishnan V. Pagalthivarthi; Sanjeev Sanghi

doi:10.14429/dsj.53.2266

P.S. V.S. Sridhar General Electric Company, Bangalore
Krishnan V. Pagalthivarthi Indian Institute of Technology Delhi
Sanjeev Sanghi Indian Institute of Technology Delhi

DOI: https://doi.org/10.14429/dsj.53.2266

Keywords: Fluid flow, solid-fluid flow, coupling, test rig, impact, one-way coupling, impact-wear test rig, two-phase flow, Reynolds number

Abstract

Dilute solid-fluid flow over a wedge in a stationary channel is numerically solved using one-way coupling between fluid and solid particles. The two-dimensional, steady, laminar carrierphase
flow is determined by Galerkin finite-element method using Newton's iteration for primitive variables, pressure, and velocity. Velocity is interpolated biquadratically and pressure is interpolated linearly. Parameter continuation is used to compute solutions for relatively large values of flow Reynolds number. Individual particles are tracked from specified inlet positions
by a fourth-order Runge-Kutta method applied to the equations of motion ofthe particle. Forces acting on the particle include drag, pressure, and inertia. Forces due to particle-particle interaction and Basset forces are neglected. Collisions with the wedge and the walls of the channel are modelled via assumed coefficients ofrestitution in both the normal and the tangential directions. The point of actual impact is determined by interpolation. Results are presented for various parameters, such as particle diameter, wedge angle, Reynolds number, particle density, etc.