Korean Journal of Air-Conditioning and Refrigeration Engineering (설비공학논문집)

The Society of Air-Conditioning and Refrigerating Engineers of Korea (대한설비공학회)
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Instability Analysis of Marangoni Convection for $NH_3-H_2O$ Absorption Process Accompanied by Heat Transfer

열전달을 수반하는 $NH_3-H_2O$ 흡수과정에서의 Marangoni 대류 불안정성 해석

  • 김제익 (서울대학교 응용화학부) ;
  • 최창균 (서울대학교 응용화학부) ;
  • 강용태 (경희대학교 기계산업시스템공학부)
  • Published : 2003.02.01
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Abstract

Convective instability driven by surface tension is analyzed in an initially quiescent water absorbing ammonia gas with heat transfer using the linear stability analysis. The propagation theory is adapted to find the critical conditions of the onset of Marangoni convection. In this theory, the solutal penetration depth is chosen as the length scale factor. The results show that the liquid layer becomes more stable with decreasing the Schmidt number and increasing the Lewis number. It is also found that there is a critical Biot number to make the liquid layer be most unstable, and there is a linear relationship between the thor-mal Marangoni number and the solutal Marangoni number.

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References

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