TWO-WAY COUPLED EULER-EULER SIMULATIONS OF PARTICLE-LADEN FLOWS
A novel two-way coupled Eulerian-Eulerian CFD formulation for simulating particle-laden flows is presented.It is based on a new viscous model of the particle phase,and turbulent dispersion through a turbulent drag term in the phase-averaged momentum equations as detailed by 1.This approach allows explicit resolution of both saltation and suspension layers without resorting to empiricism,unlike other one-way coupled Eulerian-Eulerian approaches based on mixture formulations using the convection-diffusion particle transport equation,or the Volume of Fluid method.Successful validations are carried out against detailed measurements from controlled experiments of drifting snow and sediment suspension,by 2.The present two-way coupled approach is found capable of accurately predicting snowflux and airflow profiles as shown in Figure 1.Comparison is also made to the results of a one-way coupled method by 3 based on the convection-diffusion equation for transport of solid sediment.Both approaches are used for simulating an experiment by 4 of sediment suspension in a laboratory flume.The two-way coupled approach is shown capable of accurately predicting both sediment concentration and water velocity profiles,more accurately than the one-way coupled approach as shown in Figure 2.In Figure 3,the present two-way coupled approach is also shown capable of accurately predicting the sediment fall velocity and wall effect,without the need for the empirical relationships used for the one-way coupled approach that predict a constant sediment fall velocity throughout the entire computational domain.
drifting snow euler-euler suspension saltation sediment two-way coupling
ZIAD BOUTANIOS HRVOJE JASAK
FAMENA,University of Zagreb
国际会议
The 13th OpenFOAM Workshop(第13届OpenFOAM国际研讨会)
上海
英文
169-170
2018-06-24（万方平台首次上网日期，不代表论文的发表时间）