A full 3D model of fluid flow and heat transfer in an E.B. heated liquid metal bath

International Symposium on Liquid Metal Processing & Casting 2015

材料科学;金属工艺学

Matveichev, A.^1 ; Jardy, A.^1 ; Bellot, J.P.^1

Institut Jean Lamour - UMR 7198 CNRS, Université de Lorraine, Laboratory of Excellence DAMAS, Nancy Cedex

54011, France^1

关键词: Cooling circuits;    Dissolution kinetics;    Flow turbulence;    Fluid flow and heat transfers;    Induced flows;    Numerical results;    Precise determinations;    Surface tension effects;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/143/1/012019/pdf
DOI  :  10.1088/1757-899X/143/1/012019

学科分类：材料科学（综合）

来源: IOP

【 摘 要 】

In order to study the dissolution of exogeneous inclusions in the liquid metal during processing of titanium alloys, a series of dipping experiments has been performed in an Electron Beam Melting laboratory furnace. Precise determination of the dissolution kinetics requires knowing and mastering the exact thermohydrodynamic behavior of the melt pool, which implies full 3D modeling of the process. To achieve this goal, one needs to describe momentum and heat transfer, phase change, as well as the development of flow turbulence in the liquid. EB power input, thermal radiation, heat loss through the cooling circuit, surface tension effects (i.e. Marangoni-induced flow) must also be addressed in the model. Therefore a new solver dealing with all these phenomena was implemented within OpenFOAM platform. Numerical results were compared with experimental data from actual Ti melting, showing a pretty good agreement. In the second stage, the immersion of a refractory sample rod in the liquid pool was simulated. Results of the simulations showed that the introduction of the sample slightly disturbs the flow field inside the bath. The amount of such disturbance depends on the exact location of the dipping.