Marangoni convection instability in a sessile droplet with low volatility on heated substrate

2017 ◽  
Vol 117 ◽  
pp. 274-286 ◽  
Author(s):  
Wan-Yuan Shi ◽  
Kai-Yi Tang ◽  
Jia-Nan Ma ◽  
Yi-Wei Jia ◽  
Han-Ming Li ◽  
...  
Keyword(s):  
Marangoni Convection ◽  
Sessile Droplet ◽  
Heated Substrate

scholarly journals Modeling Unsteady Bénard-Marangoni Instabilities in Drying Volatile Droplets on a Heated Substrate

2021 ◽  
Vol 132 (2) ◽  
pp. 302-312
Author(s):  
A. A. Gavrilina ◽  
L. Yu. Barash
Keyword(s):  
Silicone Oil ◽  
Three Dimensional ◽  
Triple Line ◽  
Contact Angles ◽  
Droplet Surface ◽  
Sessile Droplet ◽  
Internal Flows ◽  
Ansys Fluent ◽  
Heated Substrate ◽  
Capillary Size

Abstract We study unsteady internal flows in a sessile droplet of capillary size evaporating in constant contact line mode on a heated substrate. Three-dimensional simulations of internal flows in evaporating droplets of ethanol and silicone oil have been carried out. For describing the Marangoni flows we find it necessary to account for the diffusion of vapor in air, the thermal conduction in all three phases and thermal radiation. The equations have been solved numerically by finite element method using ANSYS Fluent. As a result of the simulations, the nonstationary behavior of Bénard-Marangoni (BM) instabilities is obtained. At the first stage, a flower structure of BM cells near the triple line emerge. For smaller contact angles, the cells grow in size and occupy the central region of the droplet surface. Being closely connected with recent experimental and theoretical studies, the results obtained help to analyze and resolve the associated issues.

scholarly journals Numerical simulations of sessile droplet evaporating on heated substrate

2017 ◽  
Vol 226 (6) ◽  
pp. 1325-1335 ◽  
Author(s):  
Xue Chen ◽  
Paul G. Chen ◽  
Jalil Ouazzani ◽  
Qiusheng Liu
Keyword(s):  
Numerical Simulations ◽  
Sessile Droplet ◽  
Heated Substrate
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