Numerical simulation of succinonitrite dendritic growth in a forced flow

2008 ◽  
Vol 21 (6) ◽  
pp. 444-450 ◽  
Author(s):  
Z CHEN ◽  
C CHEN ◽  
L HAO
Keyword(s):  
Numerical Simulation ◽  
Dendritic Growth ◽  
Forced Flow

Numerical simulation of facet dendritic growth in a forced flow

2009 ◽  
Vol 87 (2) ◽  
pp. 117-123 ◽  
Author(s):  
Zhi Chen ◽  
Chang Le Chen ◽  
Li Mei Hao
Keyword(s):  
Numerical Simulation ◽  
Dendritic Growth ◽  
Field Model ◽  
Phase Field Model ◽  
Forced Flow ◽  
Simulation Based ◽  
Growth Feature ◽  
Mesh Grid ◽  
Flow Anisotropy ◽  
Growth Shape

A numerical simulation based on a new regularized phase-field model is developed to describe the silicon solidification in a forced flow. The effect of forced flow, anisotropy, and mesh grid on dendritic growth shape is investigated. These results indicate that crystals grow into an equiaxial facet dendritic without flow and into an asymmetrical facet dendritic with flow, that is, upstream arm growth is promoted, and downstream inhibited, however, there is no such effect on perpendicular arms. It is also found that the asymmetrical growth feature becomes noticeable with increase in the flow velocity. With the increase in the anisotropy value, the tip velocities of upstream and downstream decrease gradually.

Phase Field Simulation of Parameters Affecting Dendrite Growth in a Forced Flow

2011 ◽  
Vol 228-229 ◽  
pp. 44-49
Author(s):  
Xun Feng Yuan ◽  
Yu Tian Ding
Keyword(s):  
Flow Velocity ◽  
Phase Field ◽  
Dendritic Growth ◽  
Field Model ◽  
Phase Field Model ◽  
Pure Metal ◽  
Dendrite Growth ◽  
Forced Flow ◽  
Low Flow ◽  
Tip Radius

The phase-field model coupled with a flow field was used to simulate the dendrite growth in the undercooled pure metal melt. The effects of flow velocity, supercooling and anisotropy on the dendritic growth were studied. Results indicate that melt flow can enhance the emergence of side-branches, the morphology of the dendrite was composed of the principal branches and side-branches. With an increase in flow velocity and supercooling, the velocity of upstream dendritic tip increases, but the tip radius decreases first and then increases. With an increase in anisotropy values, the velocity of upstream dendritic tip increases and the tip radius decreases. The results of calculation agreed with LMK theory in the case of low flow velocity and anisotropy.

scholarly journals Numerical Simulation of Three-Dimensional Dendritic Growth

1996 ◽  
Vol 77 (19) ◽  
pp. 4050-4053 ◽  
Author(s):  
Alain Karma ◽  
Wouter-Jan Rappel
Keyword(s):  
Numerical Simulation ◽  
Dendritic Growth ◽  
Three Dimensional

Phase-field simulations of forced flow effect on dendritic growth perpendicular to flow

2011 ◽  
Vol 21 (3) ◽  
pp. 612-617 ◽  
Author(s):  
Zhi-ping WANG ◽  
Jun-wei WANG ◽  
Chang-sheng ZHU ◽  
Li FENG ◽  
Rong-zhen XIAO
Keyword(s):  
Phase Field ◽  
Dendritic Growth ◽  
Forced Flow ◽  
Flow Effect

Numerical Simulation of Nonlinear Flow and Heat Transfer in a Sudden Expansion and Contraction Channel

2016 ◽  
Author(s):  
M. Yang ◽  
L. Q. Yang ◽  
W. Lu ◽  
L. Li ◽  
Q. X. Liu ◽  
...  
Keyword(s):  
Heat Transfer ◽  
Numerical Simulation ◽  
Reynolds Number ◽  
Rectangular Channel ◽  
Flow Region ◽  
Nonlinear Flow ◽  
Forced Flow ◽  
Sudden Expansion ◽  
Symmetric State ◽  
Flow And Heat Transfer

Numerical simulation of forced flow in sudden-expansion followed by sudden-contraction rectangular channel was presented for the whole flow region. The nonlinear flow and heat transfer characteristics were investigated by various Reynolds number and geometrical dimension and the critical Reynolds numbers under different conditions have been calculated. The results show flow and heat transfer from symmetric state to asymmetric state with the increase of Re. When Re<Rec (critical Reynolds number for flow transformation), the symmetric state is stable. On the other hand, when Re ≥Rec, the flow loses stability and from symmetric to asymmetric via a symmetry-breaking bifurcation. And the heat transfer performance have relevant characteristics as fluid flow.

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