- PII
- 10.31857/S0040364423030183-1
- DOI
- 10.31857/S0040364423030183
- Publication type
- Status
- Published
- Authors
- Volume/ Edition
- Volume 61 / Issue number 4
- Pages
- 594-603
- Abstract
- 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.
- Keywords
- Date of publication
- 01.07.2023
- Year of publication
- 2023
- Number of purchasers
- 0
- Views
- 4
References
- 1. 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.
- 2. 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.
- 3. 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.
- 4. Karmakar A., Acharya S. Numerical Simulation of Falling Film Flow Hydrodynamics over Round Horizontal Tubes // Int. J. Heat Mass Transfer. 2021. V. 173. 121175.
- 5. 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.
- 6. 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.
- 7. 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.
- 8. 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.
- 9. 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.
- 10. 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.
- 11. 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.
- 12. Lavalle G., Sebilleau J., Legendre D. Rivulet Cascade from Falling Liquid Films with Side Contact Lines // Phys. Rev. Fluids. 2020. V. 5. 124001.
- 13. 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.
- 14. Smolka L.B., SeGall M. Fingering Instability Down the Outside of a Vertical Cylinder // Phys. Fluids. 2011. V. 23. 092103.
- 15. 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.
- 16. 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.
- 17. 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.
- 18. 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.
- 19. 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.
