Thermocapillary Flow Instabilities in a Rotating Annular Pool for Moderate-Prandtl-number Fluid
| Autor: | Yao Xiao, Zhouhua Qiu, Linmao Yin, Zhong Zeng, Hao Liu |
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| Rok vydání: | 2021 |
| Předmět: |
Physics
Applied Mathematics Flow (psychology) Spectral element method Prandtl number General Engineering Rotational symmetry General Physics and Astronomy Marangoni number Mechanics Rotation 01 natural sciences Instability 010305 fluids & plasmas Physics::Fluid Dynamics symbols.namesake Modeling and Simulation 0103 physical sciences symbols 010306 general physics Linear stability |
| Zdroj: | Microgravity Science and Technology. 33 |
| ISSN: | 1875-0494 0938-0108 |
| DOI: | 10.1007/s12217-020-09847-3 |
| Popis: | The linear stability of thermocapillary flow in a rotating annular pool at intermediate Prandtl number (Pr = 1.4) was studied over a wide range of rotation rate. The critical Marangoni number for the onset of flow instability was determined using linear stability analysis based on the spectral element method. The results indicate that the pool rotation can stabilize the thermocapillary flow and affect the instability mechanism. Specially, three bifurcations were observed with increasing Marangoni number when the rotation rate is small, and this peculiar phenomenon is believed to be the competition result of the inertial instability mechanism and the thermocapillary mechanism. Moreover, the steady axisymmetric basic flow was found to be extraordinarily stable in a certain range of rotation rate. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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