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ISSN Печать: 1065-5131
ISSN Онлайн: 1563-5074
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PASSIVE DIRECTIONAL MOTION OF FLUID DURING BOILING DRIVEN BY SURFACE ASYMMETRY IN A DIELECTRIC FLUID
Краткое описание
Passive thermal management is of interest in cooling of electronics and avionics in terrestrial and reduced gravity environments. This paper describes the use of microscale asymmetric surface patterns, or ratchets, to generate preferential fluid motion during phase change. The asymmetric patterns take the form of an array of ratchet structures. Preferentially directed bubble growth is demonstrated for boiling on surfaces with such ratchets augmented with re-entrant cavities to produce nucleation at preferred sites. During pool boiling in FC-72, the asymmetric geometry of microstructures causes bubbles to grow normal to the sloped surface rather than in a vertical direction, resulting in a net motion in a preferential direction. Bubble growth from the re-entrant cavities is studied using high-speed photography and image processing techniques. The concept of self-propulsion is extended to an open-ended channel configuration, wherein high-speed videos that document preferential motion of vapor slugs with velocities in the range of several mm/s are presented. Liquid motion is explained using a semi-empirical force balance.
-
Cole, R. and Shulman, H.L., Bubble Growth Rates at High Jakob Numbers, Int. J. Heat Mass Transf., vol. 9, pp. 1377-1390,1966.
-
Demiray, F. and Kim, J., Microscale Heat Transfer Measurements during Pool Boiling of FC-72: Effect of Subcooling, Int. J. Heat Mass Transf., vol. 47, pp. 3257-3268,2004.
-
Hutter, C., Kenning, D., Sefi, K., Karayiannis, T., Lin, H., Cummins, G., and Walton, A., Experimental Pool Boiling Investigations of FC-72 on Silicon with Artificial Cavities and Integrated Temperature Microsensors, Exp. Therm. FluidSci., vol. 34, pp. 422-433,2010.
-
Jun, T.K. and Kim, C.-J., Valveless Pumping Using Traversing Vapor Bubbles in Microchannels, J. Appl. Phys., vol. 83, pp. 5658-5664,1998.
-
Kapsenberg, F., Thiagarajan, N., Narayanan, V, and Bhavnani, S.H., Lateral Motion of Bubbles from Surfaces with Mini Ratchet Topography Modifications during Pool Boiling-Experiments and Preliminary Model, Proc. of the 13th Intersociety Conf. on Thermal and Thermomechanical Phenomena in Electronic Systems (ITherm-2012), pp. 165-175, San Diego, CA, May 30-June 1, 2012.
-
Lee, H.C., Oh, B.D., Bae, S.W., and Kim, M.H., Single Bubble Growth in Saturated Pool Boiling on a Constant Wall Temperature Surface, Int. J. Multiphase Flow, vol. 29, pp. 1857-1874,2003.
-
Linke, H., Alemian, B.J., Melling, L.D., Taormina, M.J., Francis, M., Dow-Hygelund, C.C., Narayanan, V, Taylor, R.P., and Stout, A., Self-Propelled Leidenfrost Droplets,Phys. Rev. Lett., vol. 96, p. 154502, 2006.
-
Mikic, B. and Rohsenow, W., Bubble Growth Rates in Non-Uniform Temperature Field, Prog. Heat Mass Transf., vol. 2, pp. 283-293,1969.
-
Mikic, B., Rohsenow, W., and Griffith, P, On Bubble Growth Rates, Int. J. Heat Mass Transf., vol. 13, pp. 657-666,1970.
-
Ok, J., Lopez-Ona, E., Nikitopoulos, D., Wong, H., and Park, S., Propulsion of Droplets on Micro- and Sub-Micron Ratchet Surfaces in the Leidenfrost Temperature Regime, Microfluid. Nanofluid., vol. 10, no. 5, pp. 1045-1054,2011.
-
Plesset, M. andZwick S.A., The Growth of Vapor Bubbles in Superheated Liquids, J. Appl. Phys., vol. 25, pp. 493-500,1954.
-
Ramaswamy, C., Joshi, Y., Nakayama, W., and Johnson, W., High-Speed Visualization of Boiling from an Enhanced Structure, Int. J. Heat Mass Transf., vol. 45, pp. 4761-4771,2002.
-
Rayleigh, L., On the Pressure Developed in a Liquid during the Collapse of a Spherical Cavity, London, Edinburgh, Dublin Philos. Mag. J. Sci., vol. 34, pp. 94-98, 1917.
-
Scriven, L., On the Dynamics of Phase Growth, Chem. Eng. Sci., vol. 10, pp. 1-13,1959.
-
Thiagarajan, N., Kapsenberg, F., Narayanan, V, Bhavnani, S.H., and Ellis, C.D., Development of a Heat Sink with Periodic Asymmetric Structures Using Grayscale Lithography and Deep Reactive Ion Etching, Electron Device Lett., vol. 33, pp. 1054-1056,2012.
-
Thiagarajan, N., Kapsenberg, F., Narayanan, V, Bhavnani, S.H., and Ellis, C.D., Phase-Change Actuated Pumping on an Asymmetric Augmented Surface: Design and Feasibility, ASME InterPACK 2011 Conf., Portland, OR, Paper No. IPACK2011-52054, July 6-8,2011.
-
van Stralen, S., Sohal, M., Cole, R., and Sluyter, W., Bubble Growth Rates in Pure and Binary Systems: Combined Effect of Relaxation and Evaporation Microlayers, Int. J. Heat Mass Transf., vol. 18, pp. 453-467,1975.
-
Yuan, H. and Prosperetti, A., The Pumping Effect of Growing and Collapsing Bubbles in a Tube, J. Micromech. Microeng., vol. 9, p. 402, 1999.
-
Zuber, N., The Dynamics of Vapor Bubbles in Non-Uniform Temperature Field, Int. J. Heat Mass Transf., vol. 2, pp. 83-98,1961.
-
Sridhar Karthekeyan, Narayanan Vinod, Bhavnani Sushil, Development of Microgravity Boiling Experiments aboard the International Space Station from Terrestrial Adverse Gravity Outcomes for a Ratcheted Microstructure with Engineered Nucleation Sites, 2021 20th IEEE Intersociety Conference on Thermal and Thermomechanical Phenomena in Electronic Systems (iTherm), 2021. Crossref