Abstract
Phase field modeling is carried out to investigate the convective and morphological instability during directional solidification of a succinonitrile/acetone alloy. Considering the presence of gravity, we have found that the planar interface could become wrinkled even beyond the Mullins-Sekerka instability; this is originated from the lateral solute segregation induced by the flow. For the cases slightly above the onset of instability, morphologies of shallow cells are affected by the convection as well. The cells with different wavelengths and depths can coexist due to the flow-induced segregation. The coupling of long- (convective mode) and short wavelengths (morphological mode) is illustrated for the first time, which cannot be predicted by the linear stability theory. As the growth rate is further increased, the effect of the buoyancy decreases.
| Original language | English |
|---|---|
| Pages (from-to) | 202-208 |
| Number of pages | 7 |
| Journal | Journal of Crystal Growth |
| Volume | 295 |
| Issue number | 2 |
| DOIs | |
| Publication status | Published - 2006 Oct 1 |
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Keywords
- A1. Adaptive phase field simulation
- A1. Convection
- A1. Morphological instability
- A1. Solidification
ASJC Scopus subject areas
- Condensed Matter Physics
- Inorganic Chemistry
- Materials Chemistry
Cite this
Phase field modeling of convective and morphological instability during directional solidification of an alloy. / Lan, C. W.; Lee, Min-Hung; Chuang, M. H.; Shih, C. J.
In: Journal of Crystal Growth, Vol. 295, No. 2, 01.10.2006, p. 202-208.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Phase field modeling of convective and morphological instability during directional solidification of an alloy
AU - Lan, C. W.
AU - Lee, Min-Hung
AU - Chuang, M. H.
AU - Shih, C. J.
PY - 2006/10/1
Y1 - 2006/10/1
N2 - Phase field modeling is carried out to investigate the convective and morphological instability during directional solidification of a succinonitrile/acetone alloy. Considering the presence of gravity, we have found that the planar interface could become wrinkled even beyond the Mullins-Sekerka instability; this is originated from the lateral solute segregation induced by the flow. For the cases slightly above the onset of instability, morphologies of shallow cells are affected by the convection as well. The cells with different wavelengths and depths can coexist due to the flow-induced segregation. The coupling of long- (convective mode) and short wavelengths (morphological mode) is illustrated for the first time, which cannot be predicted by the linear stability theory. As the growth rate is further increased, the effect of the buoyancy decreases.
AB - Phase field modeling is carried out to investigate the convective and morphological instability during directional solidification of a succinonitrile/acetone alloy. Considering the presence of gravity, we have found that the planar interface could become wrinkled even beyond the Mullins-Sekerka instability; this is originated from the lateral solute segregation induced by the flow. For the cases slightly above the onset of instability, morphologies of shallow cells are affected by the convection as well. The cells with different wavelengths and depths can coexist due to the flow-induced segregation. The coupling of long- (convective mode) and short wavelengths (morphological mode) is illustrated for the first time, which cannot be predicted by the linear stability theory. As the growth rate is further increased, the effect of the buoyancy decreases.
KW - A1. Adaptive phase field simulation
KW - A1. Convection
KW - A1. Morphological instability
KW - A1. Solidification
UR - http://www.scopus.com/inward/record.url?scp=33748962851&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=33748962851&partnerID=8YFLogxK
U2 - 10.1016/j.jcrysgro.2006.07.032
DO - 10.1016/j.jcrysgro.2006.07.032
M3 - Article
AN - SCOPUS:33748962851
VL - 295
SP - 202
EP - 208
JO - Journal of Crystal Growth
JF - Journal of Crystal Growth
SN - 0022-0248
IS - 2
ER -