Theoretical studies of nucleate boiling heat transfer
This study is divided into two parts. In the first part, the thermally-dominated growth is considered of an isolated spherical vapor bubble in an infinite liquid with decreasing external pressure. For the case where the saturation temperature decreases linearly with time, a parametric solution is obtained by an extension of the Lagrangian solutions of earlier authors. Reference solutions are also obtained by a direct numerical solution of the integral equation for the bubble wall temperature. In the second part, the effects of bubble sliding and dryout in subcooled nucleate boiling are studied by simple calculations. It is shown that the contribution of microlayer evaporation to the overall heat transport can be increased by a factor of two compared to a stationary bubble with uniform-thickness microlayer. Also, it is indicated that the heat flux increases dramatically near the contact region when dryout occurs.
- Research Organization:
- Northwestern Univ., Evanston, IL (USA)
- OSTI ID:
- 7002783
- Resource Relation:
- Other Information: Thesis (Ph. D.)
- Country of Publication:
- United States
- Language:
- English
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