Numerical Simulation of a Spanwise Vortex in a Periodic Forced Flow

2015 ◽  
pp. 439-445 ◽  
Author(s):  
E. J. López-Sánchez ◽  
G. Ruíz Chavarría
Keyword(s):  
Numerical Simulation ◽  
Forced Flow ◽  
Spanwise Vortex

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.

Numerical Simulation of Heat Transfer in Boiling Nitrogen under Swirl Forced Flow

1998 ◽  
Vol 29 (1-3) ◽  
pp. 34-38
Author(s):  
O. B. Karpova ◽  
A. B. Yakovlev ◽  
S. E. Tarasevich
Keyword(s):  
Heat Transfer ◽  
Numerical Simulation ◽  
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.

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