Numerical simulation on fluid flow behavior during 3-dimensional dendrite growth with random preference angle

作     者：Qi Wang Ke-jie Feng Shi-jie Zhang Chen-yu Li Ri Li Qi Wang;Ke-jie Feng;Shi-jie Zhang;Chen-yu Li;Ri Li

作者机构：School of Materials Science and EngineeringHebei University of TechnologyTianjin 300401China 

出 版 物：《China Foundry》 (中国铸造（英文版）)

年 卷 期：2022年第19卷第5期

页      面：387-394页

核心收录：

学科分类：08[工学] 080203[工学-机械设计及理论] 0802[工学-机械工程] 

基　　金：financially supported by the National Natural Science Foundation of China (Nos. 51475138 and 51975182) 

主　　题：two sets of grids randomly select preference angle three dimensional LB-CA model fluid flow 

摘      要：The flow behavior of three-dimensional(3D)dendrite growth with random preferred angle under natural convection was studied by using the Lattice Boltzmann-Cellular Automata(LB-CA)method with dynamic and static *** this model,the temperature field,flow field and solute field calculated by Lattice Boltzmann method(LBM)and dendrite growth calculated by CA method were carried out in static and dynamic grids respectively,and the coupling between LBM and CA was performed by interpolation of calculation parameters between dynamic and static *** show that the asymmetry of solid phase distribution makes the streamline distribution more *** the initial stage of multiple dendrites growth,the fluid flow is relatively *** dendrites grow close to each other,the fluid flow is blocked and can only flow along the gap between *** the wall equiaxed-columnar-central equiaxed crystals transformation(ECET)process,dense eddy current is formed at the wall equiaxed crystals at ***,when the wall equiaxed crystals gradually develop into columnar crystals,the eddy current moves with the solid-liquid *** the central equiaxed crystals are formed,the eddy current at the front of the columnar crystals gradually *** eddies appear as the central equiaxed crystal grows.