Effect of artificial perturbations on the formation of structures in a nonisothermal liquid film

Chinnov, E. A.; Zhukovskaya, O. V.

doi:10.1134/s1063785006050130

Cited by 8 publications

(2 citation statements)

References 4 publications

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“…Further, this was fol lowed by revealing two types of structures on the liquid film surface [4] and studying the mechanisms to con trol this process [5,6]. The main part of investigations of the thermocapillary force effect on hydrodynamics and heat transfer in falling liquid films was performed at small and moderate Reynolds numbers (Re < 50).…”

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confidence: 99%

Thermocapillary effects in nonisothermal liquid film at high Reynolds numbers

Chinnov

2013

High Temp

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The temperature and wave characteristics of the water film flowing down a vertical plate with a heater at Re = 300 are studied. The field of film thicknesses at different heat flux values was measured using the fluorescence method. The temperature field on the film surface was measured by an infrared scanner. The experimental data were obtained for variations in temperature over the liquid film surface with time during the propagation of waves. When the falling liquid is heated, the thermocapillary forces lead to formation of rivulets and a thin film between them. Averaging of measurements allowed the value of the transverse film deformation to be determined. Two mechanisms of influence of thermocapillary forces on the motion of the wavy liquid film are marked. For the first time, the exhibition of such a strong thermocapillary effects is revealed in the heated liquid film at high Reynolds numbers.

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Section: Introductionmentioning

confidence: 99%

Thermocapillary effects in nonisothermal liquid film at high Reynolds numbers

Chinnov

2013

High Temp

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“…Re = 7.7 (1), 14.4(2,8), 28.2 (3, 10), 38.2 (4, 11), 22 (5), 20.7(6,9), 7.7 (7), d w = 2 (1−6), 1.5 (7−11) mm.…”

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confidence: 99%

Measurement of the wave characteristics of a film under the effect of external perturbations

Chinnov

Назаров

Серов

2008

Thermophys. Aeromech.

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The effect of artificial perturbations on structure formation in the water film flow over a vertical plate with a heater was studied experimentally. To measure the film thickness an eight-channel capacitance probe was used. It is shown that artificial perturbations on the liquid film surface can change the distance between rivulets from the values corresponding to the thermocapillary-wave regime of rivulet formation to the values related to the thermocapillary regime. The distance between the rivulets can be changed at Reynolds numbers higher than those corresponding to the thermocapillary regime. Artificial perturbations do not change significantly the relative amplitude of large waves, but they affect the character of amplitude dependence on the heat flux density.Key words: heat transfer intensification, wave characteristics, artificial perturbations on the film surface, thermocapillary-wave regime of rivulet formation, changes in relative amplitudes of large waves.

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Wave – Thermocapillary effects in heated liquid films at high Reynolds numbers

Chinnov

2014

International Journal of Heat and Mass Transfer

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Effect of artificial perturbations on the formation of structures in a nonisothermal liquid film

Cited by 8 publications

References 4 publications

Thermocapillary effects in nonisothermal liquid film at high Reynolds numbers

Thermocapillary effects in nonisothermal liquid film at high Reynolds numbers

Measurement of the wave characteristics of a film under the effect of external perturbations

Wave – Thermocapillary effects in heated liquid films at high Reynolds numbers

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