Influence of the surface deformability and variable viscosity on buoyant - thermocapillary instability in a liquid layer

1999 ◽  
Vol 8 (1) ◽  
pp. 125-135 ◽  
Author(s):  
Z. Kozhoukharova ◽  
C. Rozé
Keyword(s):  
Liquid Layer ◽  
Variable Viscosity ◽  
Thermocapillary Instability

Thermocapillary instability of a liquid layer under heat flux modulation

2009 ◽  
Vol 21 (6) ◽  
pp. 062102 ◽  
Author(s):  
B. L. Smorodin ◽  
A. B. Mikishev ◽  
A. A. Nepomnyashchy ◽  
B. I. Myznikova
Keyword(s):  
Heat Flux ◽  
Liquid Layer ◽  
Thermocapillary Instability ◽  
Flux Modulation

Oscillatory thermocapillary instability in liquid layer with insoluble surfactant

2017 ◽  
Author(s):  
Razihan Allias ◽  
Mohd. Agos Salim Nasir ◽  
Seripah Awang Kechil
Keyword(s):  
Liquid Layer ◽  
Insoluble Surfactant ◽  
Thermocapillary Instability

Surface Energy Variation Effect on the Onset of Thermocapillary Instability of a Thin Liquid Layer Heated from the Side

2003 ◽  
Vol 125 (1) ◽  
pp. 63-69 ◽  
Author(s):  
Lin Wu ◽  
Kang Ping Chen
Keyword(s):  
Surface Energy ◽  
Liquid Layer ◽  
Interfacial Energy ◽  
High Surface ◽  
Energy Balance Equation ◽  
Release Mechanism ◽  
Cold Surface ◽  
Thin Liquid Layer ◽  
Energy Variation ◽  
Thermocapillary Instability

A general interfacial energy balance equation taking into account surface energy variation is derived for viscous two-layer flows. Application of this interfacial energy equation to a thin liquid layer heated from one side using a one-layer model shows that thermocapillary induced surface energy variation has a tendency to stabilize the system, resulting in an increase in the critical Marangoni number for the onset of thermocapillary instability. Thermocapillary induced surface energy variation tends to decrease the temperature of hot surface spots and increase the temperature of cold surface spots through an absorb-release mechanism. This absorb-release mechanism increases the free surface’s capability to convect thermal energy from hot spots to cold spots and thus redistributes the disturbance energy evenly across the free surface. This new stabilizing effect becomes stronger at high surface temperature and at high surface dilatation rate.

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