A coupled VOF-IBM-enthalpy approach for modeling motion and growth of equiaxed dendrites in a solidifying melt

作者：Karagadde Shyamprasad; Bhattacharya Anirban; Tomar Gaurav^*; Dutta Pradip

来源：Journal of Computational Physics, 2012, 231(10): 3987-4000.

DOI：10.1016/j.jcp.2012.02.001

• Equiaxed dendrites
• Enthalpy method
• VOF
• Immersed boundary
• Growth and motion
• Melt flow

A coupled methodology for simulating the simultaneous growth and motion of equiaxed dendrites in solidifying melts is presented. The model uses the volume-averaging principles and combines the features of the enthalpy method for modeling growth, immersed boundary method for handling the rigid solid-liquid interfaces, and the volume of fluid method for tracking the advection of the dendrite. The algorithm also performs explicit-implicit coupling between the techniques used. A two-dimensional framework with incompressible and Newtonian fluid is considered. Validation with available literature is performed and dendrite growth in the presence of rotational and buoyancy driven flow fields is studied. It is seen that the flow fields significantly alter the position and morphology of the dendrites.

• 出版日期2012-5-20