Abstract
In the present study, we performed comprehensive experiments and direct Navier–Stokes computations on the linear stability of gravity-driven film flows. We focused on the switching between different types of stability isles, appearing in viscous films over inclined topographies, which describes an abrupt change of the flow’s free-surface stability. We systematically varied the inclination angle, the liquid, the substrate’s shape and the corrugation’s periodicity and uncovered when this phenomenon appears and how it proceeds. Our combined experimental and numerical work unveiled that the switching is of a universal nature as it can be induced by a slight variation of one of the multitude of completely differing parameters mentioned above. The in-depth investigation of this phenomenon presented in this article is of interest for the technical exploitation of film flows as it puts the reader into the position to avoid high-risk situations where a small change of the system’s configuration leads to a significantly different system response.
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References
Kistler, S.F., Schweizer, P.M.: Liquid Film Coating. Chapman and Hall, New York (1997)
Quéré, D.: Fluid coating on a fibre. Annu. Rev. Fluid Mech. 31, 347–384 (1999)
Weinstein, S.J., Ruschak, K.J.: Coating flows. Annu. Rev. Fluid Mech. 36, 29–53 (2004)
Gugler, G., Beer, R., Mauron, M.: Operative limits of curtain coating due to edges. Chem. Eng. Process. Process Intensif. 50, 462–465 (2011)
Kraus, A., Bar-Cohen, A., Wative, A.A.: Cooling Electronic Equipment, 3rd edn. Wiley, Hoboken (2006)
Fair, J.R., Bravo, J.R.: Distillation columns containing structured packing. Chem. Eng. Prog. 86, 19–29 (1990)
DeSantos, J.M., Melli, T.R., Scriven, L.E.: Mechanics of gas-liquid flow in packed-bed contactors. Annu. Rev. Fluid Mech. 23, 233–260 (1991)
Webb, R.L.: Principles of Enhanced Heat Transfer. Wiley, New York (1994)
Vlasogiannis, P., Karagiannis, G., Argyropoulos, P., Bontozoglou, V.: Air–water two-phase flow and heat transfer in a plate heat exchanger. Int. J. Multiph. Flow 28, 757–772 (2002)
Valluri, P., Matar, O.K., Hewitt, G.F., Mendes, M.A.: Thin film flow over structured packings at moderate Reynolds numbers. Chem. Eng. Sci. 60, 1965–1975 (2005)
Helbig, K., Nasarek, R., Gambaryan-Roisman, T., Stephan, P.: Effect of longitudinal minigrooves on flow stability and wave characteristics of falling liquid films. J. Heat Transf. 131, 011601 (2009)
Bull, J.L., Grotberg, J.B.: Surfactant spreading on thin viscous films: film thickness evolution and periodic wall stretch. Exp. Fluids 34, 1–15 (2003)
Stone, A.H., Strook, A.D., Ajdari, A.: Engineering flows in small devices: microfluidics toward a lab-on-a-chip. Annu. Rev. Fluid Mech. 36, 381–411 (2004)
Kapitza, P.L.: Wave flow of thin layers of a viscous fluid. Zh. Eksp. Teor. Fiz. 18, 3–28 (1948)
Kapitza, P.L., Kapitza, S.P.: Wavy flow of thin layers of a viscous fluid. Zh. Eksp. Teor. Fiz. 19, 105–120 (1949)
Benjamin, T.B.: Wave formation in laminar flow down an inclined plane. J. Fluid Mech. 2, 554–574 (1957)
Yih, C.S.: Stability of liquid flow down an inclined plane. Phys. Fluids 6, 321–334 (1963)
Gjevik, B.: Occurrence of finite-amplitude surface waves on falling liquid films. Phys. Fluids 13, 1918–1925 (1970)
Alekseenko, S.V., Nakoryakov, V.Y., Pokusaev, B.G.: Wave formation on a vertical falling liquid film. AIChE 31, 1446–1460 (1985)
Liu, J., Paul, J.D., Gollub, J.P.: Measurements of the primary instabilities of film flows. J. Fluid Mech. 250, 69–101 (1993)
Chang, H.C.: Wave evolution on a falling film. Annu. Rev. Fluid Mech. 26, 103–136 (1994)
Liu, J., Gollub, J.P.: Solitary wave dynamics of film flows. Phys. Fluids 6, 1702–1712 (1994)
Vlachogiannis, M., Bontozoglou, V.: Observations of solitary wave dynamics of film flows. J. Fluid Mech. 435, 191–215 (2001)
Oron, A., Davis, S.H., Bankoff, S.G.: Long-scale evolution of thin liquid films. Rev. Mod. Phys. 69, 931–980 (1997)
Chang, H.C., Demekhin, E.A.: Complex Wave Dynamics on Thin Films. Elsevier, Amsterdam (2002)
Craster, R.V., Matar, O.K.: Dynamics and stability of thin liquid films. Rev. Mod. Phys. 81, 1131–1198 (2009)
Trifonov, Y.Y.: Stability and nonlinear wavy regimes in downward film flows on a corrugated surface. J. Appl. Mech. Tech. Phys. 48, 91–100 (2007)
Trifonov, Y.Y.: Counter-current gas-liquid flow between vertical corrugated plates. Chem. Eng. Sci. 66, 4851–4866 (2011)
Argyriadi, K., Vlachogiannis, M., Bontozoglou, V.: Experimental study of inclined film flow along periodic corrugations: the effect of wall steepness. Phys. Fluids 18, 012102 (2006)
Reck, D., Aksel, N.: Experimental study on the evolution of traveling waves over an undulated incline. Phys. Fluids 25, 102101 (2013)
Vlachogiannis, M., Bontozoglou, V.: Experiments on laminar film flow along a periodic wall. J. Fluid Mech. 457, 133–156 (2002)
Wierschem, A., Lepski, C., Aksel, N.: Effect of long undulated bottoms on thin gravity-driven films. Acta Mech. 179, 41–66 (2005)
Wierschem, A., Aksel, N.: Instability of a liquid film flowing down an inclined wavy plane. Physica D 186, 221–237 (2003)
Dávalos-Orozco, L.A.: Nonlinear instability of a thin film flowing down a smoothly deformed surface. Phys. Fluids 19, 074103 (2007)
Dávalos-Orozco, L.A.: Instabilities of thin films flowing down flat and smoothly deformed walls. Microgravity Sci. Technol. 20, 225–229 (2008)
Trifonov, Y.Y.: Viscous liquid film flows over a vertical corrugated surface and the film free surface stability. Russ. J. Eng. Thermophys. 10(2), 129–145 (2000)
Trifonov, Y.Y.: Stability of a viscous liquid film flowing down a periodic surface. Int. J. Multiph. Flow 33, 1186–1204 (2007)
Trifonov, Y.Y.: Stability and bifurcations of the wavy film flow down a vertical plate: the results of integral approaches and full-scale computations. Fluid Dyn. Res. 44, 031418 (2012)
D’Alessio, S.J.D., Pascal, J.P., Jasmine, H.A.: Instability in gravity-driven flow over uneven surfaces. Phys. Fluids 21, 062105 (2009)
Heining, C., Aksel, N.: Effects of inertia and surface tension on a power-law fluid flowing down a wavy incline. Int. J. Multiph. Flow 36, 847–857 (2010)
Cao, Z., Vlachogiannis, M., Bontozoglou, V.: Experimental evidence for a short-wave global mode in film flow along periodic corrugations. J. Fluid Mech. 718, 304–320 (2013)
Tseluiko, D., Blyth, M.G., Papageorgiou, D.T.: Stability of film flow over inclined topography based on a long-wave nonlinear model. J. Fluid Mech. 729, 638–671 (2013)
Pollak, T., Aksel, N.: Crucial flow stabilization and multiple instability branches of gravity-driven films over topography. Phys. Fluids 25, 024103 (2013)
Trifonov, Y.Y.: Stability of a film flowing down an inclined corrugated plate: the direct Navier–Stokes computations and Floquet theory. Phys. Fluids 26, 114101 (2014)
Schörner, M., Reck, D., Aksel, N.: Does the topography’s specific shape matter in general for the stability of film flows? Phys. Fluids 27, 042103 (2015)
Schörner, M., Reck, D., Aksel, N.: Stability phenomena far beyond the Nusselt flow—revealed by experimental asymptotics. Phys. Fluids 28, 022102 (2016)
Spurk, J.H., Aksel, N.: Fluid Mechanics, 2nd edn. Springer, Berlin (2008)
Pollak, T., Haas, A., Aksel, N.: Side wall effects on the instability of thin gravity-driven films—from long-wave to short-wave instability. Phys. Fluids 23, 094110 (2011)
Georgantaki, A., Vatteville, J., Vlachogiannis, M., Bontozoglou, V.: Measurements of liquid film flow as a function of fluid properties and channel width: evidence for surface-tension-induced long-range transverse coherence. Phys. Rev. E 84, 026325 (2011)
Acknowledgements
We wish to thank Marion Märkl, Stephan Eißner and Dominik Schröder for their help in carrying out parts of the experiments and kindly acknowledge the DAAD for providing a visiting fellowship for Prof. Trifonov, Grant No. 91577374, which made this project possible.
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This paper is dedicated to the memory of Franz Ziegler
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Schörner, M., Reck, D., Aksel, N. et al. Switching between different types of stability isles in films over topographies. Acta Mech 229, 423–436 (2018). https://doi.org/10.1007/s00707-017-1979-0
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DOI: https://doi.org/10.1007/s00707-017-1979-0