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Pool-boiling CHF enhancement by modulated porous-layer coating: theory and experiment.

Author(s) : LITER S. G., KAVIANY M.

Type of article: Article

Summary

Modulated (periodically non-uniform thickness) porous-layer coatings, as an example of capillary artery-evaporator systems, are experimentally shown to enhance the pool-boiling critical heat flux nearly three times more than with a plain surface. The modulation separates the liquid and vapour phases, thus reducing the liquid-vapour counterflow resistance adjacent to the surface. Theories are suggested for two independent mechanisms capable of causing the liquid choking that leads to the critical heat flux. These mechanisms are investigated. The theories are then used to discuss the optimization of the enhancement and suggest that completely separated liquid and vapour flow paths can result in substantial further enhancement.

Details

  • Original title: Pool-boiling CHF enhancement by modulated porous-layer coating: theory and experiment.
  • Record ID : 2002-1756
  • Languages: English
  • Source: International Journal of Heat and Mass Transfer - vol. 44 - n. 22
  • Publication date: 2001/11

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