Research Papers: Evaporation, Boiling, and Condensation

Enhanced Evaporation of Microscale Droplets With an Infrared Laser

[+] Author and Article Information
Luis A. Ferraz-Albani, Alberto Baldelli, Reinhard Vehring, David S. Nobes, Larry W. Kostiuk

Department of Mechanical Engineering,
University of Alberta,
Edmonton, AB T6G 2G8, Canada

Chrissy J. Knapp, Wolfgang Jäger

Department of Chemistry,
University of Alberta,
Edmonton, AB T6G 2G2, Canada

Jason S. Olfert

Department of Mechanical Engineering,
University of Alberta,
Edmonton, AB T6G 2G8, Canada
e-mail: jolfert@ualberta.ca

1Corresponding author.

Contributed by the Heat Transfer Division of ASME for publication in the JOURNAL OF HEAT TRANSFER. Manuscript received February 1, 2016; final manuscript received August 11, 2016; published online September 20, 2016. Assoc. Editor: Milind A. Jog.

J. Heat Transfer 139(1), 011503 (Sep 20, 2016) (8 pages) Paper No: HT-16-1048; doi: 10.1115/1.4034486 History: Received February 01, 2016; Revised August 11, 2016

Enhancement of water droplet evaporation by added infrared radiation was modeled and studied experimentally in a vertical laminar flow channel. Experiments were conducted on droplets with nominal initial diameters of 50 μm in air with relative humidities ranging from 0% to 90% RH. A 2800 nm laser was used with radiant flux densities as high as 4 × 105 W/m2. Droplet size as a function of time was measured by a shadowgraph technique. The model assumed quasi-steady behavior, a low Biot number liquid phase, and constant gas–vapor phase material properties, while the experimental results were required for model validation and calibration. For radiant flux densities less than 104 W/m2, droplet evaporation rates remained essentially constant over their full evaporation, but at rates up to 10% higher than for the no radiation case. At higher radiant flux density, the surface-area change with time became progressively more nonlinear, indicating that the radiation had diminished effects on evaporation as the size of the droplets decreased. The drying time for a 50 μm water droplet was an order of magnitude faster when comparing the 106 W/m2 case to the no radiation case. The model was used to estimate the droplet temperature. Between 104 and 5 × 105 W/m2, the droplet temperature changed from being below to above the environment temperature. Thus, the direction of conduction between the droplet and the environment also changed. The proposed model was able to predict the changing evaporation rates for droplets exposed to radiation for ambient conditions varying from dry air to 90% relative humidity.

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Ejima, H. , Richardson, J. J. , Liang, K. , Best, J. P. , van Koeverden, M. P. , Such, G. K. , Cui, J. , and Caruso, F. , 2013, “ One-Step Assembly of Coordination Complexes for Versatile Film and Particle Engineering,” Science, 341(6142), pp. 154–157. [CrossRef] [PubMed]
Kitano, T. , Nishio, J. , Kurose, R. , and Komori, S. , 2014, “ Evaporation and Combustion of Multicomponent Fuel Droplets,” Fuel, 136, pp. 219–225. [CrossRef]
McAllister, S. , Chen, J.-Y. , and Fernandez-Pello, A. C. , 2011, “ Droplet Evaporation and Combustion,” Fundamentals of Combustion Processes, Springer, Berlin, pp. 155–175.
Sharma, S. , and Debenedetti, P. G. , 2012, “ Evaporation Rate of Water in Hydrophobic Confinement,” Proc. Natl. Acad. Sci., 109(12), pp. 4365–4370. [CrossRef]
Ranjbar, H. , and Shahraki, B. H. , 2013, “ Effect of Aqueous Film‐Forming Foams on the Evaporation Rate of Hydrocarbon Fuels,” Chem. Eng. Technol., 36(2), pp. 295–299. [CrossRef]
Chan, H.-K. , and Kwok, P. C. L. , 2011, “ Production Methods for Nanodrug Particles Using the Bottom-Up Approach,” Adv. Drug Delivery Rev., 63(6), pp. 406–416. [CrossRef]
Vehring, R. , 2008, “ Pharmaceutical Particle Engineering Via Spray Drying,” Pharm. Res., 25(5), pp. 999–1022. [CrossRef] [PubMed]
Rogers, S. , Fang, Y. , Qi Lin, S. X. , Selomulya, C. , and Dong Chen, X. , 2012, “ A Monodisperse Spray Dryer for Milk Powder: Modelling the Formation of Insoluble Material,” Chem. Eng. Sci., 71, pp. 75–84. [CrossRef]
Twomey, S. , 1991, “ Aerosols, Clouds and Radiation,” Atmos. Environ., Part A, 25(11), pp. 2435–2442. [CrossRef]
Hara, H. , and Kumagai, S. , 1994, “ The Effect of Initial Diameter on Free Droplet Combustion With Spherical Flame,” Proc. Combust. Inst., 25(1), pp. 423–430. [CrossRef]
Elperin, T. , and Krasovitov, B. , 1995, “ Evaporation of Liquid Droplets Containing Small Solid Particles,” Int. J. Heat Mass Transfer, 38(12), pp. 2259–2267. [CrossRef]
Dombrovsky, L. , Sazhin, S. , Sazhina, E. M. , Feng, G. , Heikal, M. R. , Bardsley, M. , and Mikhalovsky, S. , 2001, “ Heating and Evaporation of Semi-Transparent Diesel Fuel Droplets in the Presence of Thermal Radiation,” Fuel, 80(11), pp. 1535–1544. [CrossRef]
Tseng, C. , and Viskanta, R. , 2005, “ Effect of Radiation Absorption on Fuel Droplet Evaporation,” Combust. Sci. Technol., 177(8), pp. 1511–1542. [CrossRef]
Abramzon, B. , and Sazhin, S. , 2006, “ Convective Vaporization of a Fuel Droplet With Thermal Radiation Absorption,” Fuel, 85(1), pp. 32–46. [CrossRef]
Sazhin, S. S. , 2006, “ Advanced Models of Fuel Droplet Heating and Evaporation,” Prog. Energy Combust. Sci., 32(2), pp. 162–214. [CrossRef]
Koh, H.-S. , Shin, W.-S. , Jeon, M.-Y. , and Park, B.-S. , 2012, “ The Variation of Radiation Transmittance by the cw 1.07 μm Fiber Laser and Water Aerosol Interaction,” J. Opt. Soc. Korea, 16(3), pp. 191–195. [CrossRef]
Tatartchenko, V. , Liu, Y. , Chen, W. , and Smirnov, P. , 2012, “ Infrared Characteristic Radiation of Water Condensation and Freezing in Connection With Atmospheric Phenomena; Part 3: Experimental Data,” Earth-Sci. Rev., 114(3–4), pp. 218–223. [CrossRef]
Sgro, A. E. , Allen, P. B. , and Chiu, D. T. , 2007, “ Thermoelectric Manipulation of Aqueous Droplets in Microfluidic Devices,” Anal. Chem., 79(13), pp. 4845–4851. [CrossRef] [PubMed]
Shemirani, F. M. , Azhdarzadeh, M. , Mohammad, T. , Fong, J. , Church, T. K. , Lewis, D. A. , Finlay, W. H. , and Vehring, R. , 2012, “ A Continuous, Monodisperse Propellant Microdroplet Stream as a Model System for Laser Analysis of Mass Transfer in Metered Dose Inhaler Sprays,” Respir. Drug Delivery, 3, pp. 773–776.
Ulmke, H. , Wriedt, T. , and Bauckhage, K. , 2001, “ Piezoelectric Droplet Generator for the Calibration of Particle-Sizing Instruments,” Chem. Eng. Technol., 24(3), pp. 265–268. [CrossRef]
Luo, W. , and Deng, G. , 2013, “ Simulation Analysis of Jetting Dispenser Based on Two Piezoelectric Stacks,” 14th International Conference on Electronic Packaging Technology, IEEE, Changsha, China, Aug. 11–14, pp. 738–741.
Sun, J. , Fuh, J. , Thian, E. , Hong, G. , Wong, Y. , Yang, R. , and Tan, K. , 2013, “ Fabrication of Electronic Devices With Multi-Material Drop-On-Demand Dispensing System,” Int. J. Comput. Integr. Manuf., 26(10), pp. 897–906. [CrossRef]
Gu, Z. , Deng, G. , and Zhou, C. , 2014, “ Study on Temperature Field of Fluid Jet-Dispenser Based on Two Piezoelectric Stacks,” Applications of Ferroelectrics (ISAF), Chengdu, China, IEEE, pp. 684–687.
Saleki-Haselghoubi, N. , Shervani-Tabar, M. T. , Taeibi-Rahni, M. , and Dadvand, A. , 2014, “ Numerical Study on the Oscillation of a Transient Bubble Near a Confined Free Surface for Droplet Generation,” Theoretical and Computational Fluid Dynamics, Springer, Berlin, pp. 1–24.
Wen, Y. , Deng, G. , and Zhou, C. , 2014, “ Simulation Analysis of Jet Dispenser Based on Piezoelectric Actuators,” 15th International Conference on Electronic Packaging Technology, Chengdu, China, pp. 680–683.
Baldelli, A. , Boraey, M. A. , Nobes, D. , and Vehring, R. , 2015, “ Analysis of the Particle Formation Process of Structured Microparticles,” Mol. Pharm., 12(8), pp. 2562–2573. [CrossRef] [PubMed]
Tritton, D. J. , 1959, “ Experiments on the Flow Past a Circular Cylinder at Low Reynolds Numbers,” J. Fluid Mech., 6(4), pp. 547–567. [CrossRef]
Incorpera, F. P. , Dewitt, D. P. , Bergman, T. L. , and Lavine, A. S. , 2007, Fundamental of Heat and Mass Transfer, 6th ed., Wiley, New York, p. 512.
Ponkham, K. , Meeso, N. , Soponronnarit, S. , and Siriamornpun, S. , 2012, “ Modeling of Combined Far-Infrared Radiation and Air Drying of a Ring Shaped-Pineapple With/Without Shrinkage,” Food Bioprod. Process., 90(2), pp. 155–164. [CrossRef]
Simmons, H. C. , 1977, “ The Correlation of Droplet-Size Distibution in Fuel Nozzle Sprays, Part I: The Droplet-Size/Volume-Fraction Distribution,” J. Eng. Power, Ser. A, 99(3), pp. 309–319. [CrossRef]
Oberdier, L. M. , 1984, “ An Instrumentation System to Automize the Analysis of Fuel-Spray Images Using Computer Vision,” Liquid Particle Size Measurement Techniques, (ASTM STP 848), J. M. Tishkoff , R. D. Ingebo , and J. B. Kennedy , eds., American Society for Testing and Materials, Philadelphia, PA.
Weiss, B. A. , Derov, P. , DeBiase, D. , and Simmons, H. C. , 1984, “ Fluid Particle Sizing Using a Fully Automated Optical Imaging System,” Opt. Eng., 23, pp. 561–566. [CrossRef]
Ghaemi, S. , Rahimi, P. , and Nobes, D. , 2008, “ Measurement of Droplet Centricity and Velocity in the Spray Field of an Effervescent Atomizer,” ASME Paper No. FEDSM2008-55046, pp. 617–625.
Gomez, J. , Fleck, B. , Olfert, J. , and McMillan, J. , 2011, “ Influence of Two-Phase Feed Bubble Size on Effevescent Atomization in a Horizontal Nozzle Assembly,” Atomization Sprays, 21(3), pp. 249–261. [CrossRef]
Podczeck, F. , Rahman, S. , and Newton, J. , 1999, “ Evaluation of a Standardised Procedure to Assess the Shape of Pellets Using Image Analysis,” Int. J. Pharm., 192(2), pp. 123–138. [CrossRef] [PubMed]
Ali Al Zaitone, B. , and Tropea, C. , 2011, “ Evaporation of Pure Liquid Droplets: Comparison of Droplet Evaporation in an Acoustic Field Versus Glass-Filament,” Chem. Eng. Sci., 66(17), pp. 3914–3921. [CrossRef]
Boraey, M. A. , and Vehring, R. , 2014, “ Diffusion Controlled Formation of Microparticles,” J. Aerosol Sci., 67, pp. 131–143. [CrossRef]
Vehring, R. , Foss, W. R. , and Lechuga-Ballesteros, D. , 2007, “ Particle Formation in Spray Drying,” J. Aerosol Sci., 38(7), pp. 728–746. [CrossRef]
Vicente, J. , Pinto, J. , Menezes, J. , and Gaspar, F. , 2013, “ Fundamental Analysis of Particle Formation in Spray Drying,” Powder Technol., 247, pp. 1–7. [CrossRef]
Dennis, S. C. R. , Walker, J. D. A. , and Hudson, J. D. , 1973, “ Heat Transfer From a Sphere at Low Reynolds Numbers,” J. Fluid Mech., 60(2), pp. 273–283. [CrossRef]
Rawls, W. , Brakensiek, D. , and Saxton, K. , 1982, “ Estimation of Soil Water properties,” Trans. ASAE, 25(5), pp. 1316–1320. [CrossRef]
Senol, A. , 2013, “ Solvation-Based Vapour Pressure Model for (Solvent + Salt) Systems in Conjunction With the Antoine Equation,” J. Chem. Thermodyn., 67, pp. 28–39. [CrossRef]


Grahic Jump Location
Fig. 1

Schematic of the experimental setup

Grahic Jump Location
Fig. 2

Comparison between the experimental and model results for different conditions of air temperature (T∞ = 19.8 °C and T∞ = 60 °C) and 0% relative humidity. Dashed lines represent a two standard deviation band in the measured initial diameters.

Grahic Jump Location
Fig. 5

Comparison between the experimental and numerical model results for water droplets subject to infrared radiation and different conditions of relative humidity. Dashed lines represent two standard deviations in the initial droplet diameter. (a) T∞ = 24.0 °C, RH = 0%, power = 2.33 W, and standard deviation of initial droplet diameter (Sd,0) = 0.81 μm; (b) T∞ = 24.6 °C, RH = 30%, power = 2.33 W, and Sd,0 = 0.81 μm; (c) T∞ = 23.7 °C, RH = 60%, power = 1.91 W, and Sd,0 = 0.67 μm; and (d) T∞ = 24.3 °C, RH = 90%, power = 2.37 W, and Sd,0 = 0.65 μm.

Grahic Jump Location
Fig. 4

Variation of the surface temperature of water droplets, Ts, with respect to droplet diameter for various infrared radiant flux densities, RH = 0%, and T∞  = 293.15 K

Grahic Jump Location
Fig. 3

Evolution of squared diameter (micrometers squared) with respect to time (seconds) for pure water droplets with conditions of RH = 0%, T∞  = 20 °C, initial diameter of 48.12 μm, and varying infrared radiation




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