Investigating the role of oriented nucleus in polymer shish-kebab crystal growth via phase-field method

2014 ◽  
Vol 140 (11) ◽  
pp. 114102 ◽  
Author(s):  
Xiaodong Wang ◽  
Jie Ouyang ◽  
Jin Su ◽  
Wen Zhou
Keyword(s):  
Crystal Growth ◽  
Phase Field ◽  
Field Method ◽  
Phase Field Method ◽  
Oriented Nucleus

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.

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

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.

Phase-Field Simulation of Binary Alloy Crystal Growth Prepared by a Fluid Flow

2015 ◽  
Vol 833 ◽  
pp. 11-14
Author(s):  
Ming Chen ◽  
Xiao Dong Hu ◽  
Dong Ying Ju
Keyword(s):  
Fluid Flow ◽  
Crystal Growth ◽  
Binary Alloy ◽  
Phase Field ◽  
Field Method ◽  
Phase Field Method ◽  
Al Alloy ◽  
Structural Pattern ◽  
Fluid Field ◽  
Phase Field Models

Phase field method (PFM) was employed to investigate the crystal growth of Mg-Al alloy, on the basis of binary alloy model, the fluid field equation was coupled into the phase-field models, and the marker and cell (MAC) method was used in the numerical calculation of micro structural pattern. In the cast process, quantitative comparison of different anisotropy values that predicted the dendrite evolution were discussed in detail, and when the fluid flow rate reaches a high value, we can see the remelting of dendrite arms.

A Phase-Field Model Coupled with Lattice Kinetics Solver for Modeling Crystal Growth in Furnaces

2014 ◽  
Vol 15 (1) ◽  
pp. 76-92 ◽  
Author(s):  
Guang Lin ◽  
Jie Bao ◽  
Zhijie Xu ◽  
Alexandre M. Tartakovsky ◽  
Charles H. Henager
Keyword(s):  
Crystal Growth ◽  
Phase Field ◽  
Field Model ◽  
Phase Interface ◽  
Phase Field Model ◽  
Field Method ◽  
Phase Field Method ◽  
Growth Interface ◽  
Operational Conditions ◽  
Temperature Boundary

AbstractIn this study, we present a new numerical model for crystal growth in a vertical solidification system. This model takes into account the buoyancy induced convective flow and its effect on the crystal growth process. The evolution of the crystal growth interface is simulated using the phase-field method. A semi-implicit lattice kinetics solver based on the Boltzmann equation is employed to model the unsteady incompressible flow. This model is used to investigate the effect of furnace operational conditions on crystal growth interface profiles and growth velocities. For a simple case of macroscopic radial growth, the phase-field model is validated against an analytical solution. The numerical simulations reveal that for a certain set of temperature boundary conditions, the heat transport in the melt near the phase interface is diffusion dominant and advection is suppressed.

Sign in / Sign up

Export Citation Format

Share Document