On the stability of bubbles trapped at a solid–liquid interface: A thermodynamical approach

2009 ◽  
Vol 603 (18) ◽  
pp. 2870-2873 ◽  
Author(s):  
R. Colaço ◽  
A.P. Serro ◽  
B. Saramago
Keyword(s):  
Liquid Interface ◽  
The Stability ◽  
Solid Liquid Interface ◽  
Solid Liquid

Stability of Thermoelectromagnetic Convection

2006 ◽  
Author(s):  
Brent C. Houchens
Keyword(s):  
Numerical Solutions ◽  
Liquid Interface ◽  
Analytical And Numerical Solutions ◽  
The Stability ◽  
Solid Liquid Interface ◽  
Solid Liquid ◽  
Initial Results

The role of thermoelectromagnetic convection (TEMC) on the stability of a range of flows is investigated. Here we discuss the general features of TEMC, and describe experiments in which this effect is thought to have significance. The general formulation for TEMC at a solid-liquid interface is presented. Initial results are benchmarked with existing analytical and numerical solutions.

Evolution of the Solidification Microstructure of Rheocast High Purity Aluminium

2012 ◽  
Vol 192-193 ◽  
pp. 109-115 ◽  
Author(s):  
Sarah George ◽  
Robert Knutsen
Keyword(s):  
High Purity ◽  
Liquid Interface ◽  
Cellular Growth ◽  
Solidification Mode ◽  
Purity Aluminium ◽  
High Purity Aluminium ◽  
Semi Solid ◽  
The Stability ◽  
Solid Liquid Interface ◽  
Solid Liquid

High purity aluminium has been successfully rheocast using the CSIR-RCS system combined with high pressure die casting. Analysis of the as-cast microstructure by SEM and EBSD revealed the presence of in-grain substructures. These morphological features show that the overall growth mode of the globular grains during rheocasting is planar, but the presence of these features indicates that the solidification mode is cellular at some stages during the slurry production process. Cellular solidification is associated with unstable growth at the solid-liquid interface and is initiated and exacerbated by solute gradients between the melt and the newly formed solid. This high purity alloy exhibits the same cellular growth, indicating that even minor solute variations have an effect on the stability of the solid-liquid interface and, hence, the mode of solidification during semi-solid rheocasting.

Convective influence on the stability of a cylindrical solid–liquid interface

1985 ◽  
Vol 151 (-1) ◽  
pp. 121 ◽  
Author(s):  
Q. T. Fang ◽  
M. E. Glicksman ◽  
S. R. Coriell ◽  
G. B. McFadden ◽  
R. F. Boisvert
Keyword(s):  
Liquid Interface ◽  
Cylindrical Solid ◽  
The Stability ◽  
Solid Liquid Interface ◽  
Solid Liquid

Stability of Solid/Liquid Interface of Pb-80wt%Sn Alloy under Direct Current during Directional Solidification

2013 ◽  
Vol 313-314 ◽  
pp. 245-248
Author(s):  
Ning Li ◽  
Rong Zhang ◽  
Li Min Zhang ◽  
Li Fei Du ◽  
Qian Liu
Keyword(s):  
Growth Rate ◽  
Directional Solidification ◽  
Direct Current ◽  
Liquid Interface ◽  
Density Current ◽  
Medium Density ◽  
Morphological Stability ◽  
The Stability ◽  
Solid Liquid Interface ◽  
Solid Liquid

The effect of medium-density current on the morphological stability of S/L interface of Pb-80wt%Sn alloy during directional solidification was investigated. The results indicated that both the DC of positive and negative 200 Acm-2 could decrease the critical growth rate of cellular/dendrite transition and minish the range of growth rate of cellular crystal. DC accelerated the microstructure transition from cellular crystal to dendrite crystal at the same pulling rate. Furthermore, the dendrite crystal was refined by positive and negative DC at high pulling rate. The effect of direction of DC to the microstructure transition could be neglected. In conclusion, the positive and negative 200 Acm-2 decreased the stability of solid/liquid interface of Pb-80%Sn alloy, and the lower the pulling rate was applied, the more obviously DC affected the microstructure.

scholarly journals The combined effects of shear and buoyancy on phase boundary stability

2019 ◽  
Vol 868 ◽  
pp. 648-665 ◽  
Author(s):  
S. Toppaladoddi ◽  
J. S. Wettlaufer
Keyword(s):  
Shear Flow ◽  
Solid Phase ◽  
Liquid Interface ◽  
Flow Instabilities ◽  
Flow Strength ◽  
Buoyancy Driven Flows ◽  
The Stability ◽  
Solid Liquid Interface ◽  
Solid Liquid ◽  
Boundary Stability

We study the effects of externally imposed shear and buoyancy driven flows on the stability of a solid–liquid interface. A linear stability analysis of shear and buoyancy-driven flow of a melt over its solid phase shows that buoyancy is the only destabilizing factor and that the regime of shear flow here, by inhibiting vertical motions and hence the upward heat flux, stabilizes the system. It is also shown that all perturbations to the solid–liquid interface decay at a very modest shear flow strength. However, at much larger shear-flow strength, where flow instabilities coupled with buoyancy might enhance vertical motions, a re-entrant instability may arise.

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