报告题目：Discrete Element Method, its coupling with Lattice Boltzmann Method and applications in mining engineering

报 告 人：Dr. Yucang Wang

报告人学校：Centrel Queesnalnd University, Rockhampton, Australia.

地点：水院楼304

时间：2015年元月5日下午2点30分

联系人：62737130，剧锦三

Title

Discrete Element Method, its coupling with Lattice Boltzmann Method and applications in mining engineering

Abstract

In this talk I will first introduce the physics of the Esys-Partricle model, an open source of Discrete Element Method (DEM), including particle rotation algorithm and calibration of DEM input parameters. Then I will talk about the coupling of DEM with thermal- , hydro- effect. Then I will present a fully coupled solid-fluid code using Discrete Element Method and Lattice Boltzmann method. The Discrete Element Method permits the particles to be bonded, and is used to model the deformation and fracture of solid, while Lattice Boltzmann Method models fluid flow. These two methods are coupled in a two-way process: the solid part provides a moving boundary condition and transfers momentum to the fluid, and the fluid exerts a dragging force to the solid. Some preliminary simulations, such as particles moving in the fluid, fluid flow in the narrow tunnel or crack and hydraulic fracture induced by injection of fluid into a borehole, are carried out to validate the code. This coupled code can be used to model the thermal energy extraction and outbursts of coal and gas.

A brief introduction to Dr. Yucang Wang

Dr. Yucang Wang now work at Centrel Queesnalnd University, Rockhampton, Australia. He obtained a Bachelor of physics (1987), and a Master’s degree (1992) and PhD degree (1998) in geophysics. He had a post-doc experience (1998-2000) in Institute of Mechanics, Chinese Academy of Sciences. From 2001-2008, he worked in Earth System Science Computational Centre (ESSCC), The Univ. of Queensland, Australia. He is the major physical developer of Esys-Particle code, an open source code developed there. From 2009 to May 2014, he worked in Earth Science and Resource Engineering, Commonwealth Science and Industry Research Organization (CSIRO), Australia. He has been developing and using the Discrete Element Model (DEM) in the past 20 years. Currently he is interested in coupling of DEM with other physics and application of DEM in simulating coal and gas outburst, geothermal energy extraction.