Journal
JOURNAL OF COMPUTATIONAL PHYSICS
Volume 231, Issue 10, Pages 3987-4000Publisher
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jcp.2012.02.001
Keywords
Equiaxed dendrites; Enthalpy method; VOF; Immersed boundary; Growth and motion; Melt flow
Funding
- John Argyris Foundation at Indian Institute of Science, Bangalore
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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. (C) 2012 Elsevier Inc. All rights reserved.
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