Numerical study of heat transfer during nucleate pool boiling

Abstract

In this paper three-dimensional numerical simulation of the atmospheric saturated pool boiling was performed. The applied modelling and numerical methods enable full representation of the two-phase mixture behaviour on the heating surface with the inclusion of the swell level prediction. The three-dimensional investigation presented here was performed in order to take into account a convective heat transfer on the heated surface, as well as spatial effects of the vapour generation and a twophase flow such as phase dispersion within the two-phase mixture. The results are presented for a short period of time after the initiation of the heat supply and vapor generation on the heating surface. The replenishment of the heating surface with water and partial surface wetting for lower heat fluxes is shown. The influence of the density of nucleation sites and the bubble residence time on the wall on the pool boiling dynamics is discussed. Also, the influence of the heat flux intensity on the pool boiling dynamics is investigated. The applied numerical and modelling method showed robustness by allowing stable calculations for wide ranges of applied modelling boiling parameters.

Numerical simulation of pool boiling on smooth, vertically aligned tandem tubes

“…The contact angle between the liquid and vapour phases on the tube is considered to be 80°, 35° and 15° for water, ethanol and FC-72, respectively [48]. The contact angles are used to consider the effect of surface roughness [49,50]. In the present study the tube surface roughness is set at 0.1 μm [16].…”

Developing a Mathematical Model for Nucleate Boiling Regime at High Heat Flux

“…Son and colleagues [17] suggested that surface roughness contributed significantly to heat transfer using a numerical simulation. A 3-D numerical study [18] of saturated water was performed under atmospheric conditions and it was revealed that a vapor blanket forms on the top heater surface under a high heat flux condition that leads to a temperature rise of the heater surface. The boiling curve is obtained numerically by determining the macrolayer thickness relying on the macrolayer model [19].…”

Nucleate Pool Boiling on A Plain Surface

“…According to the results, bubble size and detachment time are linear functions of surface tension and decreases with increasing liquid density. Stojanović et al (2016), studied pool boiling of saturated water under atmospheric conditions, numerically [12]. In the study, density of nucleation sites and bubble residence time on the wall was studied.…”