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Numerical Analyses of Fluid Dynamics of an Atomization Configuration

Published online by Cambridge University Press:  31 January 2011

Q. Xu ,
D. Cheng ,
G. Trapaga ,
N. Yang  and
E.J. Lavernia
Q. Xu
Affiliation:
Department of Chemical and Biochemical Engineering and Materials Science, University of California, Irvine, California 92697
D. Cheng
Affiliation:
Department of Chemical and Biochemical Engineering and Materials Science, University of California, Irvine, California 92697
G. Trapaga
Affiliation:
Laboratory of Investigation in Materials of CINVESTAV-IPN, Unidad Quertaro, C.P. 76230, Quertaro, Qro, Mexico
N. Yang
Affiliation:
Organization 8715, Sandia National Laboratories, 7011 East Avenue, P.O. Box 969, Livermore, California 94550
E.J. Lavernia
Affiliation:
Department of Chemical and Biochemical Engineering and Materials Science, University of California, Irvine, California 92697
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Abstract

Computational fluid dynamic techniques were used to analyze the gas flow behavior of a typical atomization configuration. The calculated results are summarized as follows. The atomization gas flow at the atomizer's exit may be either subsonic at ambient pressure or sonic at an underexpanded condition, depending on the magnitude of the inlet gas pressure. When the atomization gas separates to become a free annular gas jet, a closed recirculating vortex region is formed between the liquid delivery tube and the annular jet's inner boundary. Upon entering the atomization chamber, an underexpanded sonic gas flow is further accelerated to supersonic velocity during expansion. This pressure adjustment establishes itself in repetitive expansion and compression waves. A certain protrusion of the liquid delivery tube is crucial to obtain a stable subatmospheric pressure region at its exit. The vortex flow under the liquid delivery tube tends to transport liquid metal to the high kinetic energy gas located outside the liquid delivery tube, thereby leading to an efficient atomization.

Type
Articles
Information
Journal of Materials Research , Volume 17 , Issue 1 , January 2002 , pp. 156 - 166
Copyright
Copyright © Materials Research Society 2002

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References

Yule, A.J. and Dunkley, J.J., Atomization of Melts (Clarendon Press, Oxford, United Kingdom, 1994).Google Scholar
Lawley, A., Atomization (Metal Powder Industries Federation, Princeton, NJ, 1992).Google Scholar
Beddow, J.K., The Production of Metal Powders by Atomization (Heyden & Son, London: Philadelphia, 1978).Google Scholar
Ayers, J.D. and Anderson, I.E., U.S. Patent No. 4 619 845 (22 February 1985).Google Scholar
Ayers, J.D. and Anderson, I.E., J. Metals 37(8), 16 (1985).Google Scholar
Anderson, I.E., Osborne, M.G., and Ellis, T.W., JOM 49(3), 38 (1996).CrossRefGoogle Scholar
Anderson, I.E., Ting, J., Pecharsky, V.K., Witham, C., and Bowman, R.C., in Advances in Powder Metallurgy and Particulate Materials (Chicago, Ill.), edited by Mckotch, R.A. and Webb, R., (Metal Powder Industries Federation, 1997), Vol. 1, p. 5–31.Google Scholar
Lavernia, E.J. and Wu, Y., Spray Atomization and Deposition (John Wiley & Sons, New York, 1996).Google Scholar
Ünal, A., Metall. Trans. B. 20B, 613 (1989).CrossRefGoogle Scholar
Ünal, A., Mater. Sci. Technol. 3, 1029 (1987).CrossRefGoogle Scholar
Ünal, A., Metall. Trans. B. 20B, 833 (1989).CrossRefGoogle Scholar
Liu, J., Arnberg, L., Bäckström, N., Klang, H., and Savage, S., Mater. Sci. Eng. 98, 43 (1988).CrossRefGoogle Scholar
Baram, J.C., Veistinen, M.K., Lavernia, E.J., Abinante, M., and Grant, N.J., J. Mater. Sci. 23, 2457 (1988).CrossRefGoogle Scholar
Anderson, I.E., Figliola, R.S., and Morton, H., Mater. Sci. Eng. A 148, 101 (1991).CrossRefGoogle Scholar
Veistinen, M.K., Lavernia, E.J., Abinante, M., and Grant, N.J., Mater. Lett. 5, 373 (1987).CrossRefGoogle Scholar
Miller, S.A., Miller, R.S., Mourer, D.P., and Christensen, R.W., Int. J. Powder Metall. 33(7), 37 (1997).Google Scholar
Fritsching, U., Uhlenwinkel, V., and Bauckhage, K., Phoenics J. Computational Fluid Dynamics Appl. 5(1), 81 (1992).Google Scholar
Espina, P.I., in Sprayforming, edited by Bauckhage, K. and Uhlenwinkel, V., (University of Bremen, Bremen, Germany, 1999), p. 127.Google Scholar
Liu, H. and Dax, F.R., in Advances in Powder Metallurgy and Particulate Materials (Chicago, Ill.), edited by Mckotch, R.A. and Webb, R., (Metal Powder Industries Federation, Princeton, NJ, 1997), Vol. 1, p. 3–5.Google Scholar
Mi, J., Figliola, R.S., and Anderson, I.E., Metall. Mater. Trans. B. 28B, 935 (1997).CrossRefGoogle Scholar
Peretti, M.W., Conway, J.J., Eisen, W.B., and Longo, R.A., in Advances in Powder Metallurgy and Particulate Materials (Vancouver, B.C.), edited by Rose, C.L. and Thibodeau, M.H., (Metal Powder Industries Federation, Princeton, NJ, 1999), Vol. 1, p. 1–13.Google Scholar
Launder, B.E. and Spalding, D.B., Computational Methods Applied Mechanical Engineering (Academic Press, London: New York, 1974), Vol. 3, p. 269.Google Scholar
Theory Manual of CFD-ACE+ (CFD Research Corp., Huntsville, Alabama, 1998), Vol. 5, P. 5–8.Google Scholar
White, F.M., Fluid Mechanics (McGraw-Hill, 1979).Google Scholar
Thompson, P.A., Compressible-Fluid Dynamics (McGraw-Hill, New York, 1971).Google Scholar
Fletcher, C.A.J., Computational Techniques for Fluid Dynamics 2, (Springer-Verlag, Berlin, Germany, 1988).Google Scholar
Mi, J., Ting, J., Terpstra, R., Anderson, I.E., Mao, C-P., and Figliola, R.S., in Advances in Powder Metallurgy and Particulate Materials (Chicago, Ill.), edited by Mckotch, R.A. and Webb, R. (Metal Powder Industries Federation, 1997), Vol. 1, p. 5–13.Google Scholar
Ting, J., Mi, J., Anderson, I.E., and Terpstra, R., in Advances in Powder Metallurgy and Particulate Materials (Chicago, Ill.), edited by Mckotch, R.A. and Webb, R., (Metal Powder Industries Federation, Princeton, NJ, 1997), Vol. 1, p. 5–53.Google Scholar