odes of a Liquid Film Falling Down a Vertical Cylinder at Different Contact Angles

A. Yu. Sakhnov; Сахнов А. Ю.; O. A. Volodin; Володин О. А.; N. I. Pecherkin; Печеркин Н. И.; A. N. Pavlenko; Павленко А. Н.

doi:10.31857/S0040364423030183

odes of a Liquid Film Falling Down a Vertical Cylinder at Different Contact Angles

Autores: Sakhnov A.¹, Volodin O.¹, Pecherkin N.¹, Pavlenko A.¹
Afiliações:
1. Kutateladze Institute of Thermophysics, Siberian Branch, Russian Academy of Sciences
Edição: Volume 61, Nº 4 (2023)
Páginas: 594-603
Seção: Articles
URL: https://journals.rcsi.science/0040-3644/article/view/232756
DOI: https://doi.org/10.31857/S0040364423030183
ID: 232756

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Resumo

We present the results of a three-dimensional numerical simulation of the dynamics of a falling film of a mixture of refrigerants, 0.9 mol fraction R21 + R114, considering the liquid flow along the outer lateral surface of a round vertical cylinder for a Reynolds number of 104 and contact angles of 10°, 30°, 50°, 70°, and 90°. The simulation was carried out using the volume of fluid (VOF) method in the OpenFOAM software. The contact angle has a significant effect on the area of the wetted surface due to a change in the modes of liquid falling down the cylinder. The following flow modes are identified: continuous film, stable jet mode, cascade jet mode, and massive jet mode. These modes are similar to the modes of fluid flow on horizontal tubes.

Bibliografia

Dai Z., Zhang Y., Wang S., Nawaz K., Jacobi A. Falling-film Heat Exchangers Used in Desalination Systems: A Review // Int. J. Heat Mass Transfer. 2022. V. 185. 122407.
Hu X., Jacobi A.M. The Intertube Falling Film: Part 1. Flow Characteristics, Mode Transitions, and Hysteresis // Trans. ASME: J. Heat Transfer. 1996. V. 118. P. 616.
Li M., Lu Y., Zhang S., Xiao Y. A Numerical Study of Effects of Counter-current Gas Flow Rate on Local Hydrodynamic Characteristics of Falling Films over Horizontal Tubes // Desalination. 2016. V. 383. P. 68.
Karmakar A., Acharya S. Numerical Simulation of Falling Film Flow Hydrodynamics over Round Horizontal Tubes // Int. J. Heat Mass Transfer. 2021. V. 173. 121175.
Ramadan Z., Park C.W. Hydrodynamic Behavior of Liquid Falling Film over Horizontal Tubes: Effect of Hydrophilic Circular Surface on Liquid Film Thickness and Heat Transfer // Case Studies in Thermal Engineering. 2021. V. 24. 10082.
De Arroiabe P.F., Martinez-Urrutia A., Peña X., Martinez-Agirre M., Mounir Bou-Ali M. Influence of the Contact Angle on the Wettability of Horizontal-Tube Falling Films in the Droplet and Jet Flow Modes // Int. J. Refrigeration. 2018. V. 90. P. 12.
Iso Y., Chen X. Flow Transition Behavior of the Wetting Flow between the Film Flow and Rivulet Flow on an Inclined Wall // J. Fluids Eng. 2011. V. 133. 091101.
Sebastia-Saez D., Gu S., Ranganathan P., Papadikis K. 3D Modeling of Hydrodynamics and Physical Mass Transfer Characteristics of Liquid Film Flows in Structured Packing Elements // Int. J. Greenhouse Gas Control. 2013. V. 19. P. 492.
Sebastia-Saez D., Gu S., Ranganathan P., Papadikis K. Meso-scale CFD Study of the Pressure Drop, Liquid Hold-Up, Interfacial Area and Mass Transfer in Structured Packing Materials // Int. J. Greenhouse Gas Control. 2015. V. 42. P. 388.
Sebastia-Saez D., Gu S., Ramaioli M. Effect of the Contact Angle on the Morphology, Residence Time Distribution and Mass Transfer into Liquid Rivulets: A CFD Study // Chem. Eng. Sci. 2018. V. 176. P. 356.
Singh R.K., Galvin J.E., Sun X. Three-dimensional Simulation of Rivulet and Film Flows over an Inclined Plate: Effects of Solvent Properties and Contact Angle // Chem. Eng. Sci. 2016. V. 142. P. 24.
Lavalle G., Sebilleau J., Legendre D. Rivulet Cascade from Falling Liquid Films with Side Contact Lines // Phys. Rev. Fluids. 2020. V. 5. 124001.
Gu C., Zhang R., Zhi X., Zhu S., Qiu L. Numerical Investigation on the Flow Characteristics of Liquid Oxygen and Water in the Structured Packing // Cryogenics. 2020. V. 110. 103140.
Smolka L.B., SeGall M. Fingering Instability Down the Outside of a Vertical Cylinder // Phys. Fluids. 2011. V. 23. 092103.
Mayo L.C., McCue S.W., Moroney T.J. Gravity-driven Fingering Simulations for a Thin Liquid Film Flowing Down the Outside of a Vertical Cylinder // Phys. Rev. E. 2013. V. 87. 053018.
Hirt C.W., Nichols B.D. Volume of Fluid (VOF) M-ethod for the Dynamics of Free Boundaries // J. Comput. Phys. 1981. V. 39. № 1. P. 201.
Ding Z., Wong T.N., Liu R., Liu Q. Viscous Liquid Films on a Porous Vertical Cylinder: Dynamics and Stability // Phys. Fluids. 2013. V. 25. 064101.
Стародубцева И.П., Павленко А.Н., Володин О.А., Суртаев А.С. Особенности динамики повторного смачивания перегретой поверхности стекающей пленкой криогенной жидкости // Теплофизика и аэромеханика. 2012. Т. 19. № 3. С. 347.
Павленко А.Н., Суртаев А.С., Цой А.Н., Стародубцева И.П., Сердюков В.С. Динамика повторного смачивания перегретой поверхности стекающей пленкой жидкости // ТВТ. 2014. Т. 52. № 6. С. 886.