2024-03-28T20:24:58Z
https://u-ryukyu.repo.nii.ac.jp/oai
oai:u-ryukyu.repo.nii.ac.jp:02011422
2023-08-03T05:32:57Z
1642838163960:1642838338003
1642838403551:1642838406845
The Relative Contribution of Solutal Marangoni Convection to Thermal Marangoni Flow Instabilities in a Liquid Bridge of Smaller Aspect Ratios under Zero Gravity
Agampodi Mendis, Radeesha Laknath
Sekimoto, Atsushi
Okano, Yasunori
Minakuchi, Hisashi
Dost, Sadik
numerical simulation
dynamic mode decomposition
floating zone method
liquid bridge
The effect of solutal Marangoni convection on flow instabilities in the presence of thermal Marangoni convection in a Si-Ge liquid bridge with different aspect ratios A_s has been investigated by three-dimensional (3D) numerical simulations under zero gravity. We consider a half-zone model of a liquid bridge between a cold (top plane) and a hot (bottom plane) disks. The highest Si concentration is on the top of the liquid bridge. The aspect ratio (A_s) drastically affects the critical Marangoni numbers: the critical solutal Marangoni number (under small thermal Marangoni numbers (Ma_TA_s<_~1800)) has the same dependence on As as the critical thermal Marangoni number (under small solutal Marangoni numbers (400<_~Ma_CA_s<_~800)), i.e., it decreases with increasing A_s. The azimuthal wavenumber of the traveling wave mode increases as decreasing A_s, i.e., larger azimuthal wavenumbers (m=6,7,11,12, and 13) appear for A_s=0.25, and only m=2 appears when A_s is one and larger. The oscillatory modes of the hydro waves have been extracted as the spatiotemporal structures by using dynamic mode decomposition (DMD). The present study suggests a proper parameter region of quiescent steady flow suitable for crystal growth for smaller aspect ratios of the liquid bridge.
論文
http://purl.org/coar/resource_type/c_6501
MDPI
2021-01-26
VoR
http://hdl.handle.net/20.500.12000/48145
2073-4352
Crystals
2
11
eng
https://doi.org/10.3390/cryst11020116
https://doi.org/10.3390/cryst11020116
open access
© 2021 by the authors. Licensee MDPI, Basel, Switzerland.
Creative Commons Attribution 4.0
https://creativecommons.org/licenses/by/4.0/