THERMOCAPILLARY CONVECTION AROUND A HORIZONTAL HEAT SOURCE IN A LIQUID CAVITY

2004 ◽  
Vol 11 (2) ◽  
pp. 109-120
Author(s):  
Shuichi Torii ◽  
Wen-Jei Yang
Keyword(s):  
Heat Source ◽  
Thermocapillary Convection

Oscillating thermocapillary convection regimes driven by a point heat source

2000 ◽  
Vol 35 (2) ◽  
pp. 232-241
Author(s):  
Yu. K. Bratukhin ◽  
S. O. Makarov ◽  
A. I. Mizyov
Keyword(s):  
Heat Source ◽  
Thermocapillary Convection ◽  
Point Heat Source

scholarly journals A simulation study of the forward and backward thermocapillary migration of fluids in a microchannel

2020 ◽  
Vol 3 (4) ◽  
pp. first
Author(s):  
Long Thanh Le ◽  
Khuong Huu Nguyen
Keyword(s):  
Heat Source ◽  
Water Droplet ◽  
Thermocapillary Convection ◽  
Liquid Droplet ◽  
Dynamic Contact Angle ◽  
Dynamic Contact ◽  
Immiscible Fluids ◽  
Cold Side ◽  
Free Interface ◽  
Thermocapillary Migration

In this study, the forward and backward thermocapillary migration of fluids in a microchannel is numerically investigated. Both the upper wall and the lower wall of the microchannel are set to be an ambient temperature. Two 40mW heat sources activated periodically are placed on the left side and the right side of the droplet in a microchannel. When the heat source is turned on, a pair of asymmetric thermocapillary convection vortices is formed inside the droplet. The isotherms inside the droplet are extremely distorted by the thermocapillary convection. The forward and backward thermocapillary migration results in the net thermocapillary momentum which drives a water droplet moves from the hot side of the open channel to the cold side. The temperature gradient at the free interface on the side of acting heat source is always smaller than that on the cold side. The actuation velocity of the liquid droplet first increases significantly, and then decreases continuously for various interval times. The dynamic contact angle of a water droplet is strongly affected by the forward and backward oil flow motion and the net thermocapillary momentum inside the droplet. It is alternated due to the pressure difference acting on the free interface between two immiscible fluids during actuation process.

SECOND‐GRADE FLUID FLOW WITH POWER‐LAW HEAT FLUX AND A HEAT SOURCE

2013 ◽  
Vol 44 (8) ◽  
pp. 687-702 ◽  
Author(s):  
Tasawar Hayat ◽  
Sabir A. Shehzad ◽  
Muhammad Qasim ◽  
F. Alsaadi ◽  
Ahmed Alsaedi
Keyword(s):  
Heat Flux ◽  
Fluid Flow ◽  
Heat Source ◽  
Power Law ◽  
Second Grade ◽  
Second Grade Fluid ◽  
Grade Fluid ◽  
Power Law Heat Flux
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