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Sessile and Pendant Micro-Liter Drops Evaporate at Different Rates: An Experimental Approach | ||
| Journal of Computational Applied Mechanics | ||
| مقاله 11، دوره 47، شماره 1، شهریور 2016، صفحه 109-119 اصل مقاله (550.2 K) | ||
| نوع مقاله: Research Paper | ||
| شناسه دیجیتال (DOI): 10.22059/jcamech.2016.59260 | ||
| نویسندگان | ||
| Mathew Moore1؛ Alidad Amirfazli2؛ Seyed Farshid Chini* 3 | ||
| 1Mechanical Engineering Department, University of Alberta, Canada | ||
| 2Mechanical Engineering Department, York University, Canada | ||
| 3Mechanical Engineering Department, University of Tehran | ||
| چکیده | ||
| Evaporation of micro-liter drops from solid surfaces at room condition is mainly governed by diffusion. Therefore, there should be no difference between evaporation rate of sessile and pendant drops. However, some studies indicate a difference and explain the difference using buoyancy. The objective here is to reconcile the inconsistency in the literature. For that, first, by comparing two identical suspended drops, one with a plate on top and the other underneath with a space between drop and plate, we showed the contribution of buoyancy in evaporation is at most less than 8%. When a plate was placed on top, water (its vapor is lighter than air) evaporated slower and hydrocarbons (their vapors are heavier than air) evaporated faster. Interestingly, it was observed when drops touch the plates (i.e. sessile and pendant drops), both water and hydrocarbon drops evaporated faster in sessile configuration. The observation for hydrocarbons is in contradiction with what buoyancy explains. To describe the difference, different scenarios were studied. It was found that sessile drops stay longer in the “constant wetted area” (CWA) mode, before switching to the CCA (constant contact angle) mode, e.g. a 4 µl sessile water drop on a Poly(methyl methacrylate) coated silicon stays in the CWA mode for 318 s whereas for a similar pendant drop this time is 274 s. Considering the fact that evaporation rate in the CWA mode is 30–40% higher compared to the CCA mode, the faster evaporation rate of sessile drops may be explained. | ||
| کلیدواژهها | ||
| Evaporation؛ drop؛ buoyancy؛ sessile؛ pendant؛ diffusion؛ evaporation modes | ||
| مراجع | ||
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[1] A.C. Ihnen, A.M. Petrock, T. Chou, P.J. Samuels, B.E. Fuchs, W.Y. Lee, Crystal morphology variation in inkjet-printed organic materials, Appl. Surf. Sci. 258 (2011) 827-833.
[2] T. Lim, S. Han, J. Chung, J.T. Chung, S. Ko, C.P. Grigoropoulos, Experimental study on spreading and evaporation of inkjet printed pico-liter droplet on a heated substrate, International Journal of Heat and Mass Transfer. 52 (2009) 431-441.
[3] Y. Yu, H. Zhu, J.M. Frantz, M.E. Reding, K.C. Chan, H.E. Ozkan, Evaporation and coverage area of pesticide droplets on hairy and waxy leaves, Biosystems Engineering. 104 (2009) 324-334.
[4] U. Id, Superhydrophobic Metal-Oxide Thin Film Coatings, (2012) 2012.
[5] Z. Zhang, J. Li, P.X. Jiang, Experimental investigation of spray cooling on flat and enhanced surfaces, Applied Thermal Engineering. 51 (2013) 102-111.
[6] R. Bhardwaj, X. Fang, P. Somasundaran, D. Attinger, Self-assembly of colloidal particles from evaporating droplets: role of DLVO interactions and proposition of a phase diagram. Langmuir. 26 (2010) 7833-42.
[7] S. Tonini, Heat and mass transfer modeling of submicrometer droplets under atmospheric pressure conditions, Atomization and Sprays. 19 (2009) 833-846.
[8] C. Poulard, G. Guéna, A. Cazabat, Diffusion-Driven Evaporation of Sessile Drops, Journal of Physics Condensed Matter. 17 (2005) S4213-S4227.
[9] J.C. Maxwell, No title, in: Anonymous Collected Scientific Papers, 1st ed., Cambridge, 1890, pp. 628.
[10] G. Gue´na, C. Poulard, M. Voue´, J. De Coninck, A.M. Cazabat, Evaporation of sessile liquid droplets, (2006).
[11] C. Poulard, G. Gue, A.M. Cazabat, A. Boudaoud, M.B. Amar, Rescaling the Dynamics of Evaporating Drops, (2005) 8226-8233.
[12] S.F. Chini, A. Amirfazli, Understanding the evaporation of spherical drops in quiescent environment, 432 (2013) 82-88.
[13] S.F. Chini, Drop Removal from Solid Surfaces: Shedding and Evaporation, (2013).
[14] S.F. Chini, A. Amirfazli, Evaporation of Sessile Drops: Electrostatic Analogies, Advances in Colloid and Interface Science.
[15] N.R. Devlin, K. Loehr, M.T. Harris, The importance of gravity in droplet evaporation: A comparison of pendant and sessile drop evaporation with particles, AIChE Journal. 62 (2016) 947-955.
[16] P.L. Kelly-Zion, J. Batra, C.J. Pursell, Correlation for the convective and diffusive evaporation of a sessile drop, International Journal of Heat and Mass Transfer. 64 (2013) 278-285.
[17] F. Carle, B. Sobac, D. Brutin, Experimental evidence of the atmospheric convective transport contribution to sessile droplet evaporation, Applied Physics Letters. 102 (2013) 061603.
[18] S. Dehaeck, A. Rednikov, P. Colinet, Vapor-Based Interferometric Measurement of Local Evaporation Rate and Interfacial Temperature of Evaporating Droplets, Langmuir. 30 (2014) 2002-2008.
[19] P.L. Kelly-Zion, C.J. Pursell, S. Vaidya, J. Batra, Evaporation of sessile drops under combined diffusion and natural convection, Colloids Surf. Physicochem. Eng. Aspects. 381 (2011) 31-36.
[20] P.L. Kelly-Zion, C.J. Pursell, R.S. Booth, A.N. VanTilburg, Evaporation rates of pure hydrocarbon liquids under the influences of natural convection and diffusion, Int. J. Heat Mass Transfer. 52 (2009) 3305-3313.
[21] P.L. Kelly-Zion, C.J. Pursell, N. Hasbamrer, B. Cardozo, K. Gaughan, K. Nickels, Vapor distribution above an evaporating sessile drop, International Journal of Heat and Mass Transfer. 65 (2013) 165-172.
[22] P.L. Kelly-Zion, C.J. Pursell, R.S. Booth, A.N. VanTilburg, Evaporation rates of pure hydrocarbon liquids under the influences of natural convection and diffusion, Int. J. Heat Mass Transfer. 52 (2009) 3305-3313.
[23] O. Carrier, N. Shahidzadeh-Bonn, R. Zargar, M. Aytouna, M. Habibi, J. Eggers, D. Bonn, Evaporation of water: evaporation rate and collective effects, Journal of Fluid Mechanics. 798 (2016) 774-786.
[24] H.Y. Erbil, Evaporation of pure liquid sessile and spherical suspended drops: A review, Advances in Colloid and Interface Science. 170 (2012) 67-86.
[25] D. Hu, H. Wu, Volume evolution of small sessile droplets evaporating in stick-slip mode, Physical Review E. 93 (2016) 042805.
[26] T.A.H. Nguyen, A.V. Nguyen, Transient Volume of Evaporating Sessile Droplets: 2/3, 1/1, or Another Power Law? Langmuir. 30 (2014) 6544-6547.
[27] R.H. Perry, D.W. Green, Chemical Engineering Handbook, McGraw-Hill Book Co., New York, 1997.
[28] Y.A. Cengel, Heat Transfer a Practical Approach, McGraw-Hill Book Co., New York, 2003, pp. 857-868-868.
[29] S.F. Chini, A. Amirfazli, A method for measuring contact angle of asymmetric and symmetric drops, Colloids and Surfaces A: Physicochemical and Engineering Aspects. 388 (2011) 29-37.
[30] R.G. Picknett, R. Bexon, The Evaporation of Sessile or Pendant Drops in Still Air, J. Colloid Interface Sci. 61 (1977) 336-350.
[31] H.K. Dhavaleswarapu, C.P. Migliaccio, S.V. Garimella, J.Y. Murthy, Experimental investigation of evaporation from low-contact-angle sessile droplets, Langmuir. 26 (2010) 880-888.
[32] S. Semenov, V.M. Starov, R.G. Rubio, H. Agogo, M.G. Velarde, Evaporation of sessile water droplets: Universal behaviour in presence of contact angle hysteresis, Colloids and Surfaces A: Physicochemical and Engineering Aspects. 391 (2011) 135-144.
[33] H. Hu, R.G. Larson, Evaporation of a sessile droplet on a substrate, J Phys Chem B. 106 (2002) 1334-1344.
[34] Z.Q. Zhu, D. Brutin, Q.S. Liu, Y. Wang, A. Mourembles, J.C. Xie, L. Tadrist, Experimental investigation of pendant and sessile drops in microgravity, Microgravity Science and Technology. 22 (2010) 339-345.
[35] R.D. Deegan, O. Bakajin, T.F. Dupont, Capillary flow as the cause of ring stains from dried liquid drops, (1997).
[36] R.D. Deegan, O. Bakajin, T.F. Dupont, G. Huber, S.R. Nagel, T.A. Witten, Contact line deposits in an evaporating drop, Phys. Rev. E. 62 (2000) 756-765.
[37] R.D. Deegan, Pattern formation in drying drops, Phy. Rev. E. 61 (2000) 475-485.
[38] C. Bourgès-Monnier, M.E.R. Shanahan, Influence of evaporation on contact angle, Langmuir. 11 (1995) 2820-2829.
[39] L. Shi, P. Shen, D. Zhang, Q. Lin, Q. Jiang, Wetting and evaporation behaviors of water ethanol sessile drops on PTFE surfaces, Surface and Interface Analysis. 41 (2009) 951-955.
[40] R.G. Picknett, R. Bexon, The evaporation of sessile or pendant drops in still air, J. Colloid Int. Sci. 61 (1977) 336-350.
[41] H.Y. Erbil, G. McHale, M.I. Newton, Drop evaporation on solid surfaces: Constant contact angle mode, Langmuir. 18 (2002) 2636-2641.
[42] H.Y. Erbil, Evaporation of pure liquid sessile and spherical suspended drops: A review, Adv. Colloid Int. Sci. 170 (2012) 67-86.
[43] H.Y. Erbil, M. Dogan, Determination of diffusion coefficient-vapor pressure product of some liquids from hanging drop evaporation, Langmuir. 16 (2000) 9267-9273.
[44] B. Sobac, D. Brutin, Triple-line behavior and wettability controlled by nanocoated substrates: Influence on sessile drop evaporation, Langmuir. 27 (2011) 14999-15007 | ||
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