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Numerical Analysis for Impurity Effects on Diffusive-convection Flow Fields by Physical Vapor Transport under Terrestrial and Microgravity Conditions: Applications to Mercurous Chloride
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  • Journal title : Applied Chemistry for Engineering
  • Volume 27, Issue 3,  2016, pp.335-341
  • Publisher : The Korean Society of Industrial and Engineering Chemistry
  • DOI : 10.14478/ace.2016.1028
 Title & Authors
Numerical Analysis for Impurity Effects on Diffusive-convection Flow Fields by Physical Vapor Transport under Terrestrial and Microgravity Conditions: Applications to Mercurous Chloride
Kim, Geug Tae; Kwon, Moo Hyun;
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 Abstract
In this study, impurity effects on diffusive-convection flow fields by physical vapor transport under terrestrial and microgravity conditions were numerically analyzed for the mixture of system. The numerical analysis provides the essence of diffusive-convection flow as well as heat and mass transfer in the vapor phase during the physical vapor transport through velocity vector flow fields, streamlines, temperature, and concentration profiles. The total molar fluxes at the crystal regions were found to be much more sensitive to both the gravitational acceleration and the partial pressure of component as an impurity. Our results showed that the solutal effect tended to stabilize the diffusive-convection flow with increasing the partial pressure of component . Under microgravity conditions below , the flow fields showed a one-dimensional parabolic flow structure indicating a diffusion-dominant mode. In other words, at the gravitational levels less than , the effects of convection would be negligible.
 Keywords
microgravity;crystal growth;
 Language
English
 Cited by
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