Mathematical Model of Fluid Flow and Solidification in Mold Region of Continuous Slab Casting  

作　　者：谭利坚 沈厚发 柳百成 

机构地区：[1]Department of Mechanical Engineering Tsinghua University

出　　处：《Tsinghua Science and Technology》2003年第1期83-89,共7页清华大学学报（自然科学版（英文版）

基　　金：Supported by the National Natural Science Foundationof China-Bao Steel Conjunct Foundation ( No.5 0 1 74 0 31 )

摘　　要：To simulate the phenomena in the mold region of continuous casting by coupling fluid flow and solidification, a three-dimensional mathematical model has been developed based on the K-ε turbulence equations and the SIMPLER algorithm. A pseudo source term was introduced into the energy equation to account for the latent heat and kinetic energy. The fluid flow in the mushy zone was calculated by defining the fluid viscosity as a function of the solid fraction in the mushy zone. Fine meshes in the solid region improve convergence and reduce iteration time. Comparison of the fluid flow and temperature distribution with and without solidification shows that although the solid shell in the mold is thin, it still greatly affects the flow pattern. The numerical results obtained provide details of the fluid flow and solidification phenomena which can be used to optimize the nozzle structure and other process parameters in continuous casting.To simulate the phenomena in the mold region of continuous casting by coupling fluid flow and solidification, a three-dimensional mathematical model has been developed based on the K-ε turbulence equations and the SIMPLER algorithm. A pseudo source term was introduced into the energy equation to account for the latent heat and kinetic energy. The fluid flow in the mushy zone was calculated by defining the fluid viscosity as a function of the solid fraction in the mushy zone. Fine meshes in the solid region improve convergence and reduce iteration time. Comparison of the fluid flow and temperature distribution with and without solidification shows that although the solid shell in the mold is thin, it still greatly affects the flow pattern. The numerical results obtained provide details of the fluid flow and solidification phenomena which can be used to optimize the nozzle structure and other process parameters in continuous casting.

关 键 词：fluid flow SOLIDIFICATION mushy zone turbulence model numerical simulation continuous casting 

分 类 号：TG249.7[金属学及工艺—铸造]