The Determination of Forced-Convection Surface-Boiling Heat Transfer

TLDR

In the low wall superheat region, heat transfer can be predicted by existing forced‑convection correlations. The study examines the boiling curve characteristics of forced‑convection surface boiling and analyzes the onset of first significant boiling. The authors collected pool‑boiling data under saturated and subcooled conditions on surfaces similar to those used in forced‑convection surface boiling. Experimental results agree with analytical predictions and show that forced‑convection surface‑boiling curves must be based on actual forced‑convection data rather than saturated pool‑boiling data.

Abstract

The characteristics of the boiling curve for forced-convection surface boiling are examined in detail. In the region of low wall superheat, the heat transfer can be predicted by available correlations for forced convection. An analysis is presented for the inception of first significant boiling. Experimental results are in good agreement with analytical predictions. Pool-boiling data were taken under saturated and subcooled conditions for surfaces similar to those used in forced-convection surface boiling. These data indicate that the curves for forced-convection surface boiling cannot be based on data for saturated pool boiling but must rather be based on actual forced-convection data.