Evaporating Meniscus of Ethanol and Ethanol-Based Nanofluids in Single Micro-Channels

Abstract:

Article Preview

Evaporating meniscus of ethanol and ethanol-based nanofluids (0.01vol.%) in micro-channels were experimentally studied. Visualisation and thermographic results of the stationary meniscus confined in high-aspect-ratio rectangular micro-channels (hydraulic diameters are 571 μm, 727 μm and 1454 μm, channel cross sectional aspect ratio is 20, 20, 10 respectively) were obtained. It was found that interface evaporation rate increases with heat flux. The meniscus interface becomes deformed when the evaporation rate increases. The use of nanofluids largely enhances the interface stability even though the particle volume fraction is at a very low level. Besides, a stick-slip and back-jump behaviour of the nanofluids meniscus was captured during the transition from stable to deformed interface. Moreover, sink effect at the liquid-vapour interface was discussed based on the IR results.

Info:

Periodical:

Edited by:

Dashnor Hoxha

Pages:

685-690

Citation:

Y. Wang et al., "Evaporating Meniscus of Ethanol and Ethanol-Based Nanofluids in Single Micro-Channels", Applied Mechanics and Materials, Vol. 390, pp. 685-690, 2013

Online since:

August 2013

Export:

Price:

$38.00

[1] M. Potash Jr, P.C. Wayner Jr, Evaporation from a two-dimensional extended meniscus, International Journal of Heat and Mass Transfer, 15 (1972) 1851-1863.

DOI: https://doi.org/10.1016/0017-9310(72)90058-0

[2] K.D. Hemanth, V.G. Suresh, Y.M. Jayathi, Microscale Temperature Measurements Near the Triple Line of an Evaporating Thin Liquid Film, Journal of Heat Transfer, 131 (2009) 061501.

DOI: https://doi.org/10.1115/1.3090525

[3] K. Stephan, Influence of dispersion forces on phase equilibria between thin liquid films and their vapour, International Journal of Heat and Mass Transfer, 45 (2002) 4715-4725.

DOI: https://doi.org/10.1016/s0017-9310(01)00250-2

[4] K. Park, K. -J. Noh, K. -S. Lee, Transport phenomena in the thin-film region of a micro-channel, International Journal of Heat and Mass Transfer, 46 (2003) 2381-2388.

DOI: https://doi.org/10.1016/s0017-9310(02)00541-0

[5] G. Wang, P. Cheng, H. Wu, Unstable and stable flow boiling in parallel microchannels and in a single microchannel, International Journal of Heat and Mass Transfer, 50 (2007) 4297-4310.

DOI: https://doi.org/10.1016/j.ijheatmasstransfer.2007.01.033

[6] G. Preiss, J.P.C. Wayner, Evaporation From a Capillary Tube, Journal of Heat Transfer, 98 (1976) 178-181.

DOI: https://doi.org/10.1115/1.3450515

[7] F.J. Renk, J.P.C. Wayner, An Evaporating Ethanol Meniscus--Part I: Experimental Studies, Journal of Heat Transfer, 101 (1979) 55-58.

DOI: https://doi.org/10.1115/1.3450935

[8] F.J. Renk, J.P.C. Wayner, An Evaporating Ethanol Meniscus--Part II: Analytical Studies, Journal of Heat Transfer, 101 (1979) 59-62.

DOI: https://doi.org/10.1115/1.3450936

[9] R. Cook, C.Y. Tung, J.P.C. Wayner, Use of Scanning Microphotometer to Determine the Evaporative Heat Transfer Characteristics of the Contact Line Region, Journal of Heat Transfer, 103 (1981) 325-330.

DOI: https://doi.org/10.1115/1.3244461

[10] J.P.C. Wayner, C.Y. Tung, M. Tirumala, J.H. Yang, Experimental Study of Evaporation in the Contact Line Region of a Thin Film of Hexane, Journal of Heat Transfer, 107 (1985) 182-189.

DOI: https://doi.org/10.1115/1.3247376

[11] S.J. Kim, I.C. Bang, J. Buongiorno, L.W. Hu, Surface wettability change during pool boiling of nanofluids and its effect on critical heat flux, International Journal of Heat and Mass Transfer, 50 (2007) 4105-4116.

DOI: https://doi.org/10.1016/j.ijheatmasstransfer.2007.02.002

[12] R. -H. Chen, T.X. Phuoc, D. Martello, Surface tension of evaporating nanofluid droplets, International Journal of Heat and Mass Transfer, 54 (2011) 2459-2466.

DOI: https://doi.org/10.1016/j.ijheatmasstransfer.2011.02.016

[13] S. Vafaei, T. Borca-Tasciuc, M.Z. Podowski, A. Purkayastha, G. Ramanath, P.M. Ajayan, Effect of nanoparticles on sessile droplet contact angle, Nanotechnology, 17 (2006) 2523-2527.

DOI: https://doi.org/10.1088/0957-4484/17/10/014

[14] A.M. Munshi, V.N. Singh, M. Kumar, J.P. Singh, Effect of nanoparticle size on sessile droplet contact angle, Journal of Applied Physics, 103 (2008) 084315.

DOI: https://doi.org/10.1063/1.2912464

[15] J.R. Moffat, K. Sefiane, M.E.R. Shanahan, Effect of TiO2 Nanoparticles on Contact Line Stick−Slip Behavior of Volatile Drops, The Journal of Physical Chemistry B, 113 (2009) 8860-8866.

DOI: https://doi.org/10.1021/jp902062z

[16] Y. Wang, K. Sefiane, S. Harmand, Flow boiling in high-aspect ratio mini- and micro-channels with FC-72 and ethanol: Experimental results and heat transfer correlation assessments, Experimental Thermal and Fluid Science, 36 (2012) 93-106.

DOI: https://doi.org/10.1016/j.expthermflusci.2011.09.001

[17] S. Vafaei, D. Wen, Flow boiling heat transfer of alumina nanofluids in single microchannels and the roles of nanoparticles, Journal of Nanoparticle Research, (2010) 1-11.

DOI: https://doi.org/10.1007/s11051-010-0095-z

[18] C. Buffone, K. Sefiane, IR measurements of interfacial temperature during phase change in a confined environment, Experimental Thermal and Fluid Science, 29 (2004) 65-74.

DOI: https://doi.org/10.1016/j.expthermflusci.2004.02.004