Advertisement

Optical Investigation of Transport Phenomena During Solidification Process

  • Yau-Ming Chen
  • Yuan-Jen Chang
  • Yeong-Tsuen Hsieh
Part of the Heat and Mass Transfer book series (HMT)

Abstract

This work demonstrates the feasibility of applying optical methods, which depend on the spatial variations in the refractive index of the liquid, to characterize the transport phenomena during solidification of pure water and aqueous ammonium chloride solution in a rectangular cavity. In the first case, holographic interferometry is applied to visualize the convective flow and temperature field during a water freezing process. Experimental results indicate that the supercooling and density inversion significantly influence the water freezing process. In the second case, the solidification processes of aqueous ammonium solution are observed using the shadowgraph method. The solidification process in eutectic composition resembles that of pure substances. In a hypoeutectic solution, double-diffusive layer and remelting occur in the lower part of the flow that is stable. On the other hand, in a hypereutectic solution, double-diffusive layer and remelting occur in the upper part of the flow. The layer is ruined seriously and the flow is unstable. In the third case, a twowavelength holographic interferometry technique is applied to further investigate ]the temperature and concentration fields of a double-diffusive layered system. Merits and limitations of the interferometric method are discussed as well.

Keywords

Test Section Solidification Process Mushy Zone Cold Wall Rectangular Cavity 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

Reference

  1. Braga SL, Viskanta R (1992) Effect of density extremum on the solidification of water on a vertical wall of a rectangular cavity. Experimental Thermal and Fluid Science 5:703–713CrossRefGoogle Scholar
  2. Fukusako S, Yamada M (1993) Recent advances in research in water-freezing and ice-melting problems. Experimental Thermal and Fluid Science 6:90–105CrossRefGoogle Scholar
  3. Furukawa Y, Shimada W (1993) Three-dimensional pattern formation during growth of ice dendrites-its relation to universal law of dendritic growth. J Crystal Growth 128:234–239CrossRefGoogle Scholar
  4. Gilpin RR (1977) The Effects of Dendritic Ice Formation in Water Pipes. Int J Heat Mass Transfer 20:693–699CrossRefGoogle Scholar
  5. Grange BW, Viskanta R, Stevenson WH (1976) Diffusion of heat and solute during freezing of salt solutions. Int H Heat Mass Transfer 19(4):373–384CrossRefGoogle Scholar
  6. Hairharan P (1991) Optical interferometry. Rep. Prog. Phys 54(3):339–390CrossRefGoogle Scholar
  7. Mayinger F (1994) Fundamentals of holographic interferometry, in F. Mayinger (ed.), Optical Measurements, Chapter 4, Springer-Verlag, BerlinCrossRefGoogle Scholar
  8. Nishimura T, Fujiwara M, Horie N, Miyashita H (1991) Temperature visualizations by use of liquid crystals of unsteady natural convection during supercooling and freezing of water in an enclosure with lateral cooling. Int Heat Mass Transfer 34, 10:2663–2668Google Scholar
  9. Panknin W (1977) Eine holographishe zweiwellenlänge-interferometrie zur messung überlagerter temperature und konzentrationsgrenzshichten. Ph.D Thesis Techn. Universität Hannover.Google Scholar
  10. Prescott P J, Incropera F P (1996) Conection heat and mass transfer in alloy solidification. Advances in Heat Transfer 28:231–337 Academic Press, Inc.CrossRefGoogle Scholar
  11. Spatz TL, Poulikakos D (1992) A two-wavelength holographic Interferometry study on the solidification of a binary alloy around a horizontal pipe. ASME J Heat Transfer 114:998–1010CrossRefGoogle Scholar
  12. Virkam CS, Witherow WK (1992) Critical needs of fringe-order accuracies in two-color holographic interferometry. Exp Mech 32:74–77CrossRefGoogle Scholar

Copyright information

© Springer-Verlag Berlin Heidelberg 1999

Authors and Affiliations

  • Yau-Ming Chen
    • 1
  • Yuan-Jen Chang
    • 1
  • Yeong-Tsuen Hsieh
    • 1
  1. 1.Department of Mechanical EngineeringNational Taiwan UniversityTaipeiTaiwan

Personalised recommendations