Multiphase Science and Technology A Quarterly

ISSN for PRINT: 0276-1459

For Online Access

Best Paper Award Selection - Editorial Board Site

1997, Volume9

Issue 4

112 pages

Issue price - $140.00

B. Bricard
EDF/DER, Départment Transferts Thermiques et Aérodynamique, 6, quai Watier - 78401 Chatou Cedex, France

P. Peturaud
EDF/DER, Départment Transferts Thermiques et Aérodynamique, 6, quai Watier - 78401 Chatou Cedex, France

Jean-Marc Delhaye
Clemson University

Two existing mechanisms for DNB in forced convective boiling are unified into one which, based on nucleation site dryout, a priori covers the whole range of DNB, from bubbly to slug flow Two modelling approaches are explored. A first, simplified model, based on a global heat balance in the wall under a dry patch, enables the CHF to be calculated, distinguishing the case of thin and thick heating walls. From a comparison with CHF data, good results are obtained in a wide enough range. A second, detailed model, based on the two-dimensional unsteady thermal analysis of the wall in response to a nucleation cycle, is then developed in order to support the likeliness of the postulated mechanism in bubbly flow. A parametric study around a well-documented CHF data point, indicates some requirements for DNB to be reached.

Download article, 329-379 pages

Article price - $65.00

  Next article >>