Thermocapillary rupture in falling liquid films at moderate Reynolds numbers

An experimental study of the flow of a water film over a heated surface for Re = 15-50 was performed. The influence of the development of thermocapillary instability on the wave amplitudes, the deformation of the surface of the liquid film, and the formation of the first stable dry spot on the heater are investigated. It is shown that the interaction of waves with thermocapillary structures can lead to an increase in the critical heat flux corresponding to the rupture of the liquid film, as compared with the data known in the literature

The influence of the physical properties of the liquid on the formation of thermo-capillary structures

An experimental study of the formation of thermocapillary structures at low Reynolds numbers and temperature gradients at the surface of the film in a wide range of the viscosity of the liquid was carried out. The data on the distance between the rivulets are generalized. It is shown that the transverse dimension of structures is determined by the capillary constant and does not depend on either the viscosity of the liquid or the flow rate

Thermocapillary rupture in falling liquid films at moderate Reynolds numbers

An experimental study of the flow of a water film over a heated surface for Re = 15-50 was performed. The influence of the development of thermocapillary instability on the wave amplitudes, the deformation of the surface of the liquid film, and the formation of the first stable dry spot on the heater are investigated. It is shown that the interaction of waves with thermocapillary structures can lead to an increase in the critical heat flux corresponding to the rupture of the liquid film, as compared with the data known in the literature

The influence of the physical properties of the liquid on the formation of thermo-capillary structures

An experimental study of the formation of thermocapillary structures at low Reynolds numbers and temperature gradients at the surface of the film in a wide range of the viscosity of the liquid was carried out. The data on the distance between the rivulets are generalized. It is shown that the transverse dimension of structures is determined by the capillary constant and does not depend on either the viscosity of the liquid or the flow rate

The influence of the physical properties of the liquid on the formation of thermo-capillary structures

An experimental study of the formation of thermocapillary structures at low Reynolds numbers and temperature gradients at the surface of the film in a wide range of the viscosity of the liquid was carried out. The data on the distance between the rivulets are generalized. It is shown that the transverse dimension of structures is determined by the capillary constant and does not depend on either the viscosity of the liquid or the flow rate

The waves amplitudes increase due to interacting with thermocapillary structures

The analysis of experimental data on the simultaneous measurement of the thickness and temperature fields in the flowing heated liquid film at Re = 15 is presented. It is shown that increasing heat flux results in more expressed rivulet formation in the lower part of the heater (differential thicknesses in the rivulet and interrivulet area increases from 0.04 mm to 0.11 mm). It was found that the wave amplitude increase in the region where waves interact with the thermocapillary structures

The waves amplitudes increase due to interacting with thermocapillary structures

The analysis of experimental data on the simultaneous measurement of the thickness and temperature fields in the flowing heated liquid film at Re = 15 is presented. It is shown that increasing heat flux results in more expressed rivulet formation in the lower part of the heater (differential thicknesses in the rivulet and interrivulet area increases from 0.04 mm to 0.11 mm). It was found that the wave amplitude increase in the region where waves interact with the thermocapillary structures

Combustion of liquid fuel in rectangular mini and microchannels

It is shown that flame spread rate can be high and comparable with velocities of flame propagation in the stoichiometric homogeneous gas mixture. The flame spread rate depends on velocity of oxidizer. It can either increase or decrease with arise of oxidizer velocity, depending on the oxygen content. The flame surface is significantly distorted with increase in average flame spread rate. It is shown that the flame spread rate can be significant and comparable with the laminar burning velocity of the stoichiometric homogeneous gaseous mixture