Journal of the Korean Crystal Growth and Crystal Technology (한국결정성장학회지)

The Korea Association of Crystal Growth (한국결정성장학회)
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Mass transfer study of double diffusive natural convection in a two-dimensional enclosure during the physical vapor transport of mercurous bromide (Hg2Br2): Part II. Mass transfer

브로민화 수은(I)(Hg2Br2) 물리적 증착공정의 2차원 밀폐공간에서 이중확산 자연 대류에서의 물질전달 연구: Part II. 물질전달

  • Sung Ho Ha (Department of Chemical Engineering, Hannam University)
  • 하성호 (한남대학교 화학공학과)
  • Received : 2023.07.12
  • Accepted : 2023.07.18
  • Published : 2023.08.31
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Abstract

The average Nusselt numbers in the source and crystal region for the variation of thermal Grashof number (Grt) in the range of 2.31 × 104 ≤ Grt ≤ 4.68 × 104 are obtained through numerical simulations. It is shown the average Nusselt number in the crystal region is more than twice as large as the average Nusselt number in the source region. The average Nusselt number in the source region shows an increasing tendency with increasing the thermal Grashof number, Grt, while the average Nusselt number in the crystal region shows a decreasing tendency with increasing thermal Grashof number, Grt. For the variation of the solutal Grashof number (Grs) in the ran ge of 3.28 × 105 ≤ Grs ≤ 4.43 × 105, the average Sherwood number in the source region and crystal region tends to decrease as the solutal Grashof number, Grs increases. The average Sherwood number in the crystal region is about four times greater than the average Sherwood number in the source region.

2.31 × 104 ≤ Grt ≤ 4.68 × 104의 범위에서 온도 Grashof 수(Grt)의 변화에 대하여, 소스와 결정영역에서의 평균 Nusselt수를 나타내고 있다. 결정영역에서의 평균 Nusselt 수가 소스영역에서의 평균 Nusselt 수 보다 2배 이상 큰 것으로 나타나고 있다. 소스영역에서의 평균 Nusselt 수는 온도 Grashof 수(Grt)에 대하여, 증가하는 경향을 보여주고 있으며, 반면에 결정영역에서의 평균 Nusselt 수는 온도 Grashof 수(Grt)에 대하여, 감소하는 경향을 나타나고 있다. 3.28 × 105 ≤ Grs ≤ 4.43 × 105의 범위에서 농도 Grashof 수(Grs)의 변화에 대하여, 소스와 결정영역에서의 평균 Sherwood 수를 나타내고 있다. 소스영역과 결정영역에서의 평균 Sherwood 수는 농도 Grashof 수(Grs)가 증가함에 따라, 감소하는 경향을 보이고 있다. 결정영역에서의 평균 Sherwood 수는 소스영역에서의 평균 Sherwood 수보다 약 4배 정도 크다.

Keywords

Acknowledgement

저자는 본 연구에 적용된 SIMPLER(Semi-Implicit Method Pressure-Linked Equations Revised) program를 제공해준 한남대학교 화학공학과 김극태 교수에게 감사의 뜻을 표한다.

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