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http://dx.doi.org/10.6111/JKCGCT.2021.31.3.127

Studies on Nusselt and Sherwood number for diffusion-advective convection during physical vapor transport of Hg2Br2  

Kim, Geug Tae (Department of Chemical Engineering, Hannam University)
Kwon, Moo Hyun (Department of Energy and Electrical Engineering, Woosuk University)
Publication Information
Journal of the Korean Crystal Growth and Crystal Technology / v.31, no.3, 2021 , pp. 127-136 More about this Journal
Abstract
This paper is dedicated to numerical simulation for diffusion-advective convection in a square cavity during physical vapor transport of Hg2Br2. Flow characteristics of the temperature difference between the source and crystal regions, 50℃ (300℃ → 250℃), partial pressures of component argon of 20 Torr and 100 Torr are investigated and presented as velocity vectors and streamlines, isotherms and iso-mass concentrations contours. Moreover, alterations of average Nusselt and average Sherwood numbers with (a) the source and crystal regions, (b) the pressures of component argon of 20 Torr and 100 Torr are analyzed and addressed in details. Both average Nusselt and average Sherwood numbers are seen to decrease with the increasing values of the partial pressures of component argon. Also, it is found that for the two different partial pressures of component argon, average Nusselt numbers at the source region are greater than at the crystal region, and inversely, average Sherwood numbers at the crystal region are greater than the source region by a factor of 3.
Keywords
Diffusion-advection; Nusselt number; Sherwood number; Physical vapor transport; $Hg_2Br_2$;
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