A MATHEMATICAL MODEL OF LOCAL BOILING NONLINEAR DYNAMICS AND CRISIS

P CARRICA; A CLAUSSE

LATIN AMERICAN APPLIED RESEARCH

PLAPIQUI(UNS-CONICET)

Año: 1994 vol. 24 p. 77 - 87

0327-0793

The thermofluid dynamics of pool boiling heat transfer was theoretically studied. A tow-phase flow integral model was formulated for the local boiling field adjacent to the heated wall. A set of three non-linear differential equations models the dynamics of the localized void fraction, bubble number density and vapor velocity. The boiling crisis at the critical heat flux is described as a dynamic transition caused by the competition of bubble coalescence and breakup mechanisms. An analysis of a case of pool boiling in water is presented, showing the consistency of the formulation. The model has potential applications to thermal management of electronic microchips and devices for space environments.