Numerical simulation of wave formation and heat transfer in falling liquid films at unsteady heat release

The mathematical model which allows calculating the wave surface profile as well as velocity and temperature fields has been presented. The numerical simulation of wave formation and heat transfer in falling films of liquid nitrogen has been performed. Different activation functions of input perturb...

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Bibliographic Details
Published in:Journal of physics. Conference series 2018-11, Vol.1105 (1), p.12046
Main Authors: Chernyavskiy, A N, Pavlenko, A N
Format: Article
Language:English
Subjects:
Falling liquid films
Fluid flow
Flux density
Heat flux
Heat transfer
Liquid nitrogen
Mathematical models
Perturbation
Reynolds number
Simulation
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Summary:The mathematical model which allows calculating the wave surface profile as well as velocity and temperature fields has been presented. The numerical simulation of wave formation and heat transfer in falling films of liquid nitrogen has been performed. Different activation functions of input perturbations have been examined. The dependences of boiling expectation time and total local evaporation time on heat flux density for different inlet Reynolds numbers have been calculated. The regime map which describes the different mechanisms of film decay was obtained by summing up the simulation results. The results of numerical simulation are in satisfactory agreement with the experimental data.
ISSN:1742-6588
1742-6596
DOI:10.1088/1742-6596/1105/1/012046