Coarsening Kinetics of a Two Phase Mixture with Highly Disparate Diffusion Mobility

作     者：G.Sheng T.Wang Q.Du K.G.Wang Z.K.Liu L.Q.Chen 

作者机构：Department of Materials Science and EngineeringPennsylvania State UniversityUniversity ParkPA 16802USA Department of Materials Science and EngineeringIowa State UniversityAmesIA 50011USA Department of MathematicsPennsylvania State UniversityUniversity ParkPA 16802USA Physics and Space Science DepartmentMaterials Science&Nanotechnology InstituteFlorida Institute of TechnologyMelbourneFL 32901USA 

出 版 物：《Communications in Computational Physics》 (计算物理通讯（英文）)

年 卷 期：2010年第8卷第7期

页      面：249-264页

核心收录：

学科分类：08[工学] 080502[工学-材料学] 0805[工学-材料科学与工程（可授工学、理学学位）] 

基　　金：the financial supports from the National Science Foundation under the grant number DMR-0710483(Chen) NSF-DMS 0712744(Du) DMR-0510180(Liu) DMR-0710484(K.G.Wang) 

主　　题：Coarsening kinetics Cahn-Hilliard equation phase-field method computer simulation 

摘      要：The coarsening kinetics of a two-phase mixture with a large diffusional mobility disparity between the two phases is studied using a variable-mobility Cahn Hilliard *** semi-implicit spectral numerical technique was employed,and a number of interpolation functions are considered for describing the change in diffusion mobility across the interface boundary from one phase to *** coarsening rate of domain size was measured using both structure and pair correlation functions as well as the direct computation of particle sizes in real space for the case that the coarsening phase consists of dispersed *** discovered that the average size(R)versus time(t)follows the R^(10/3)∝t law,in contrast to the conventional LSW theory,R^(3)∝t,and the interface-diffusion dominated two-phase coarsening,R^(4)∝t.