Phase-Field Simulation Studies of Dendrite Growth Coupling with Force Flow Field

Abstract:

Coupling the force flow field with the phase field model for the isothermal growth of dendrite, Sola algorithm is used to calculate the flow speed and pressure of liquid metal, Using double grid numerical method to reduce the calculation amount of computer simulation, The space factor and time factor are introduced to improve the accuracy of double grid numerical calculation, Taking Al-2%-Cu alloy as an example, the dendrite growth process of the binary alloy under forced convection environment is simulated; The simulation results can capture the real dendrite growth and interactions of the liquid metal flow in the process of dendrite growth under forced convection environment: In the incident flow regions, the dendrite morphology is complex, the secondary dendrite is lush and the growth speed is fast due to the influence of liquid metal flow. In the back flow regions, the growth of dendrite changes the flowing pressure among the liquid metals, it causes the regional complex flow patterns and there are two opposite eddy current; the grow speed of the main branch which grows perpendicular to the initial flow direction is the fastest and presents tilt growth phenomenon. When the space coefficient value is appropriate, the dual mesh method can save calculation time effectively.

• Periodical: Advanced Materials Research (Volumes 1004-1005)
• Pages: 1069-1075
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.1004-1005.1069
• Online since: August 2014
• Authors: Li Feng*, Chang Sheng Zhu, Yang Lu, Zhi Ping Wang, Ling Min An
• Keywords: Dendrite Growth, Forced Flow, Phase Field Method, Simulation

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