JOURNAL BROWSE
Search
Advanced SearchSearch Tips
Measurement of Size Distributions of Submicron Electrosprays Using a Freezing Method and an Image Processing Technique
facebook(new window)  Pirnt(new window) E-mail(new window) Excel Download
 Title & Authors
Measurement of Size Distributions of Submicron Electrosprays Using a Freezing Method and an Image Processing Technique
Gu, Bon-Gi; Kim, Sang-Su; Kim, Yu-Dong; Lee, Sang-Yong;
  PDF(new window)
 Abstract
The size distributions of electrospray droplets from the Taylor cone in cone-jet mode are directly measured by using a freezing method and a transmission electron microscope (TEM) image processing technique. These results are compared with the data obtained by an aerodynamic size spectrometer (TSI Aerosizer DSP). The use of glycerol seeded with NaI and a freezing method make it possible to sample droplets with their original sizes preserved. Since pictures of droplets are taken with TEM with very low vapor pressure of the solution, evaporation is suppressed by freezing. For liquid flow rates below 1 nl/sec, the measured droplet diameters by the TEM image processing technique and the aerosizer are in the range of 0.25 to 0.32 m add 0.3B to 0.40m, respectively. Comparing the TEM data with the aerosizer measurements, it has been revealed that the TEM image processing technique can afford more accurate values of droplet size distributions in the submicron range of 0.1 to 0.4m.
 Keywords
Electrospray;Freezing Method;Image Processing Technique;
 Language
Korean
 Cited by
1.
정전분무에 의한 고점성 액체의 액적 생성 특성에 관한 실험적 연구,김상수;구본기;

대한기계학회논문집B, 2002. vol.26. 4, pp.604-613 crossref(new window)
 References
1.
Cloupeau, M. and Prunet-Foch, B., 1989, 'Electrostatic Spraying of Liquids in Cone-jet Mode,' J. Electrostatics, Vol. 22, pp. 135-159 crossref(new window)

2.
Tang, K. and Gomez, A., 1994, 'On the Structure of an Electrostatic Spray of Monodisperse Droplets,' Phys. Fluids, Vol. 6, No.7, pp. 2317-2332 crossref(new window)

3.
Naqwi, A., 1994, 'In situ measurement of submicron droplets in electro sprays using a planar phase Doppler system,' J. Aerosol Sci., Vol. 25, No.6, pp. 1201-1211 crossref(new window)

4.
Rosell-Llompart, J. and Fernandez de la Mora, J., 1994, 'Generation of Monodisperse Droplets 0.3 to 4${\mu}$m in Diameter from Electrified Cone-jets of Highly Conducting and Viscous Liquids,' J. Aerosol Sci., Vol. 25, No.6, pp. 1093-1119 crossref(new window)

5.
Chen, D. R., Pui, D. Y. H. and Kaufman, S. L., 1995, 'Electrospraying of Conducting Liquids for Monodisperse Aerosol Generation in the 4 nm to 1.8 ${\mu}$m Diameter Range,' J. Aerosol Sci., Vol. 26, No. 6, pp. 963-77 crossref(new window)

6.
Gomez, A. and Tang, K., 1994, 'Charge and Fission of Droplets in Electrostatic Sprays,' Phys. Fluids, Vol. 6, No.1, pp. 404-414 crossref(new window)

7.
Rao, K. V. L., 1978, 'Liquid Nitrogen Cooled Sampling Probe for the Measurement of Spray. Drop Size Distribution in Moving Liquid-Air Sprays,' Proc. ICLASS-78, Tokyo, pp. 293-300

8.
Karasawa, T.,Shiga, S. and Kurabayashi, T., 1991; 'Measurement of Droplet Sizes by Liquid Nitrogen Freezing Method,' Proc. ICIASS-91, Gaithe-sburg, pp. 637-644

9.
Kim, Y. D. and Lee, S. Y., 2000, 'Improvement of Image Processing Algorithm for Particle Size Measurement Using Hough Transformation,' the fifth conference of ILASS-Asia, Tsukuba, pp. 99-104

10.
Gonzalez, R. C. and Woods, R. E., 1993, Digital Image Processing, Addison-Wesley, New York

11.
Kidd, P. W., 1968, 'Parametric Studies with a Singlec-Needle Colloid Thruster,' J. Spacecraft and Rockets, Vol. 5,No. 9, pp. 1034-1039

12.
Huberman, M. N., 1970, 'Measurement of the Energy Dissipated in the Electrostatic Spraying process' J. Appl. Phys., Vol. 4C No.2, pp. 578-584 crossref(new window)

13.
Riqdick,. J. A. and Bunger, W. B., 1970, Organic Solvents: Physical Properties and Methods of Purification, 3rd Ed., John Wiley and Sons, New York

14.
Fetnandez de la Mora, J. and Loscertales, J. G., 1994, 'The Current Emitted by Highly Conducting Taylor Cones,' J. Fluid Mech., Vol. 260, pp. 155-184 crossref(new window)

15.
Saville, D. A., 1971, 'Stability of Electrically Charged Viscous Cylinders,' Phys. Fluids, Vol. 14, No. 6, pp. 1095-1099 crossref(new window)

16.
Hartman, R. P. A., Brunner, D. J., Camelot, D. M. A. Marijnissen, J. C. M. and Scarlett, B., 2000, 'Jet Break-up in Electrohydrodynamic Atomization in the Coneojet Mode,' J. Aerosol Sci., Vol. 31, No.1, pp. 65-95 crossref(new window)