Transactions of the Korean Society of Mechanical Engineers B (대한기계학회논문집B)

The Korean Society of Mechanical Engineers (대한기계학회)
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A study of thermophoretic particle deposition in a particle laden stagnation flow including the effect of radiative heat transfer

정체점 입자유동에서 복사열전달을 고려한 열영동 입자부착 연구

  • 정창훈 (서울대학교 대학원 기계공학과) ;
  • 이공훈 (서울대학교 대학원 기계공학과) ;
  • 최만수 (서울대학교기계공학과) ;
  • 이준식 (서울대학교기계공학과)
  • Published : 1996.05.01
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Abstract

A study of thermophoretic particle deposition has been carried out for a particle laden stagnation flow considering the effect of radiative heat transfer. Energy, concentration and radiative transfer equations are all coupled and have been solved iteratively assuming that absorption and scattering coefficients were proportional to the local concentration of particles. Radiative heat transfer was shown to strongly affect the profiles of temperature and particle concentration. e. g., radiation increases the thickness of thermal boundary layer and wall temperature gradients significantly. As the wall temperature gradients increase, the particle concentration at the wall decreases due to thermophoretic particle transport. The deposition rate that is thermophoretic velocity times particle concentration at the wall decreases as the effects of radiation increases. The effects of optical thickness, conduction to radiation parameter and wall emissivity have been determined. The effects of anisotropic scattering are shown as insignificant.

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References

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