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ISSN Online: 2379-1748

ISBN Flash Drive: 978-1-56700-431-1

ISBN Online: 978-1-56700-430-4

First Thermal and Fluids Engineering Summer Conference
August, 9-12, 2015 , New York City, USA

INVESTIGATION OF WALL SURFACE TEMPERATURE EVALUATION PROCEDURE DURING SUBCOOLED NUCLEATE BOILING IN NON- EMPIRICAL BOILING AND CONDENSATION MODEL

Get access (open in a dialog) pages 1909-1912
DOI: 10.1615/TFESC1.mph.012776

摘要

A non-empirical boiling and condensation model was developed to predict the nucleate boiling bubble behavior and its heat transfer characteristics by means of a direct numerical simulation. This paper described results of an improvement of prediction accuracy on wall surface temperature during the subcooled nucleate boiling in this model. As a validation, two-dimensional axisymmetric numerical simulations of a single bubble nucleate pool boiling under low subcooled condition based on the MARS (Multi-interface Advection and Reconstruction Solver) with this model were performed. The evolutions of wall surface temperature beneath the bubble-base obtained from the simulation were compared to experimental results. In this simulation, because of neglecting the microlayer underneath the bubble-base, the wall surface temperature predicted beneath the growing bubble was higher than that of the experimental results. In order to resolve that discrepancy, the evaluation procedure of the wall surface temperature during the subcooled nucleate boiling in this model has been improved to consider the microlayer evaporation effects underneath the bubble-base without any artificial microlayer model. As a result, the predicted wall surface temperature during the bubble growth period shows the fairly good agreement with the experimental results.