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A unified model for the prediction of bubble detachment diameters in boiling systems. 2. Flow boiling.

Author(s) : ZENG L. Z., KLAUSNER J. F., BERNHARD D. M., MEI R.

Type of article: Article

Summary

The model utilizes a force balance similar to that proposed by Klausner et al. One improvement is that the inclination angle is determined on a dynamic basis and is not required as an input. Futhermore, it is hypothesized that the surface tension force is small compared to other forces acting on a vapour bubble at the points of departure and lift-off, and thus information on the bubble contact diameter and contact angles is not required. A new data set on mean vapour bubble lift-off diameters and probability density fuctions for flow boiling of R113 on a nichrome heating strip has been obtained using the experimental facility. It is demonstrated that over the limited range of flow boiling conditions considered, the predicted departure and lift-off diameters agree well with measured values.

Details

  • Original title: A unified model for the prediction of bubble detachment diameters in boiling systems. 2. Flow boiling.
  • Record ID : 1994-0143
  • Languages: English
  • Source: International Journal of Heat and Mass Transfer - vol. 36 - n. 9
  • Publication date: 1993/06

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