Characterizing Ice Crystal Growth Behavior Under Electric Field Using Phase Field Method

2009 ◽  
Vol 131 (7) ◽  
Author(s):  
Zhi Zhu He ◽  
Jing Liu
Keyword(s):  
Crystal Growth ◽  
Electric Field ◽  
Phase Field ◽  
Field Method ◽  
Growth Behavior ◽  
Phase Field Method ◽  
Competitive Growth ◽  
Ice Crystal ◽  
Injury Mechanisms ◽  
Crystal Growth Behavior

In this article, the microscale ice crystal growth behavior under electrostatic field is investigated via a phase field method, which also incorporates the effects of anisotropy and thermal noise. The multiple ice nuclei’s competitive growth as disclosed in existing experiments is thus successfully predicted. The present approach suggests a highly efficient theoretical tool for probing into the freeze injury mechanisms of biological material due to ice formation during cryosurgery or cryopreservation process when external electric field was involved.

Study on Microstructural Evolution of Binary Alloy Crystal Growth in Directional Solidification Process

2013 ◽  
Vol 470 ◽  
pp. 100-103
Author(s):  
Dong Sheng Chen ◽  
Ming Chen ◽  
Rui Chang Wang
Keyword(s):  
Crystal Growth ◽  
Directional Solidification ◽  
Binary Alloy ◽  
Phase Field ◽  
Field Model ◽  
Phase Field Model ◽  
Field Method ◽  
Phase Field Method ◽  
Pure Substance ◽  
Columnar Dendrite

PFM (phase field method) was employed to study microstructure evolution, and considering the effect of solute concentration to the undercooling, we developed a phase field model for binary alloy on the basis of pure substance model. In the paper, the temperature field and solute field were coupled together in the phase field model to calculate the crystal growth of magnesium alloy in directional solidification. The simulation results showed a non-planar crystal growth of planar to cellular to columnar dendrite, the comparison of different dendrite patterns were carried out in the numerical simulation, and with the increasing of the anisotropy, the second dendrite arms became more developed.

An Approximate Model of the Process of Non-Dendritic Morphology Formation in Solidification of Binary Melt under Stirring

2019 ◽  
Vol 22 (4) ◽  
pp. 367-374
Author(s):  
Yu. A. Lebedinsky ◽  
A. M. Branovitsky ◽  
V. A. Dement'ev
Keyword(s):  
Crystal Growth ◽  
Phase Field ◽  
Approximate Model ◽  
Solute Concentration ◽  
Field Method ◽  
Dendritic Morphology ◽  
Phase Field Method ◽  
Primary Crystal ◽  
Initial Concentration

The primary crystal growth in a binary melt is modeled on the base of the phase field method with approximate consideration of melt stirring. Changes in the second component (solute) concentration near a solidification area during stirring are considered as a main reason of modification of dendritic morphology of crystals. An effect of stirring is approximately simulated as forced changes in the solute concentration by either resetting to initial concentration, or averaging concentration. Dendritic morphology is shown to change to rosette and then to globular one depending on space parameters of forced changes.

Numerical Simulation of Binary Alloy Crystal Growth Using Phase-Field Method

2013 ◽  
Vol 842 ◽  
pp. 57-60 ◽  
Author(s):  
Yan Bo Dong ◽  
Ming Chen ◽  
Xi Wang
Keyword(s):  
Crystal Growth ◽  
Directional Solidification ◽  
Binary Alloy ◽  
Phase Field ◽  
Phase Field Model ◽  
Solidification Process ◽  
Phase Field Method ◽  
Columnar Dendrite ◽  
Competitive Growth ◽  
Directional Solidification Process

The competitive growth of multiple dendrites and crystal growth of directional solidification in a Mg-Al binary alloy were simulated using phase-field model, and the effect of undercooling value on the microstructural dendritic growth pattern in directional solidification process was studied in the paper. The simulation results showed the impingement of the adjacent grains, which made the dendrite growth inhibited in the competitive growth of multiple dendrites, and in directional solidification process, quantitative comparison of different undercooling values that predicted the columnar dendrite evolution were carried out. With the increasing of the undercooling value, the dendrite tip radius and second dendrite arms became smaller, and the crystal structure is more uniform and dense.

A numerical study on pattern selection in crystal growth by using anisotropic lattice Boltzmann-phase field method

2020 ◽  
Vol 29 (2) ◽  
pp. 028103
Author(s):  
Zhaodong Zhang ◽  
Yuting Cao ◽  
Dongke Sun ◽  
Hui Xing ◽  
Jincheng Wang ◽  
...  
Keyword(s):  
Crystal Growth ◽  
Phase Field ◽  
Lattice Boltzmann ◽  
Numerical Study ◽  
Field Method ◽  
Phase Field Method ◽  
Pattern Selection ◽  
Anisotropic Lattice
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