NG23A-1762
An Euler-Lagrange Model for Suspension of Fine Particles and Its Application to Investigate Convective Sedimentation
Tuesday, 15 December 2015
Poster Hall (Moscone South)
Yun-Chuan Shao, Institute of Applied Mechanics National Taiwan University, Taipei, Taiwan, Chien-Cheng Chang, National Taiwan University, Taipei, Taiwan, Yi-Chun Yeh, NTNU National Taiwan Normal University, Taipei, Taiwan and Yi-Ju Chou, NTU National Taiwan University, Taipei, Taiwan
Abstract:
A two-way coupled Euler-Lagrange model is developed to simulate the suspension of fine particles in liquid flows. The goal is to develop a three-dimensional numerical model that is capable of replicating the detailed features of particle-laden turbulent flow. A two-phase fractional-step projection method is developed to ensure mixture incompressibility by solving a modified Poisson equation for pressure. An efficient particle-moving algorithm that exchanges particles between Eulerian meshes is developed that automatically retains the necessary particle information at each time step depositing sediments. Convective sedimentation of particle clouds in homogeneous and stratified background flow fields is investigated. The results show different transport patterns and resulting turbulent mixing associated with different conditions of density and particle-induced stratification.
