3D anisotropy simulation of dendrites growth with phase field method
(1. College of Materials Science and Engineering, North University of China, Taiyuan 030051, China;2. Department of Mechanical and Electronic Engineering, Hebei College of Industry and Technology, Shijiazhuang 050091, China)
Abstract: The anisotropy problem of 3D phase-field model was studied, and various degrees of anisotropy were simulated by numerical calculation method. The results show that with the change of interface anisotropy coefficients, from smooth transition to the appearance of angle, equilibrium crystals shape morphology has a critical value, and 3D critical value is 0.3. The growth of dendrites is stable and the interface is smooth when it is less than critical value; the interface is unstable, rolling edge appears and the growth is discontinuous when it is more than critical value. With the increase of anisotropy coefficients, the dendrites grow faster under the same condition.
Key words: anisotropy; dendrite growth; crystal morphology; phase field method