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Hydrodynamic modeling of flow reversal in micro-channel flow boiling.

Number: pap. 2383

Author(s) : BELMARES M., PARK Y. G.

Summary

Flow boiling in micro-channels have significantly different characteristics from flow boiling in larger channels. One particular behavior of micro-channel boiling is the instability that results in oscillations and flow reversals. This has been a unique challenge for researchers, and a satisfactory solution that eliminates the instability without a substantial performance penalty has not been found. In this study, a simple analytical model based on mass and momentum conservation is developed to identify the mechanistic conditions corresponding to the conditions of flow reversal in a boiling flow in micro-channels. The results indicate that flow reversal can occur when a rapid evaporation occurs near the inlet of the channel. The model also confirms the observations of existing studies that, if a large pressure differential in the channel is imposed in combination with a throttling section before the inlet, the flow reversal can be suppressed.

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Pages: 8 p.

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Details

  • Original title: Hydrodynamic modeling of flow reversal in micro-channel flow boiling.
  • Record ID : 30013381
  • Languages: English
  • Source: 2014 Purdue Conferences. 15th International Refrigeration and Air-Conditioning Conference at Purdue.
  • Publication date: 2014/07/14

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