Abo Bibliothek: Guest

ISSN Online: 2377-424X

ISBN Print: 0-89116-909-1

International Heat Transfer Conference 9
August, 19-24, 1990 , Jerusalem, Israel

MATHEMATICAL MODEL OF FROST GROWTH ON A SINGLE CYLINDER IN STEADY CROSSFLOW

Get access (open in a dialog) DOI: 10.1615/IHTC9.3790
pages 115-120

Abstrakt

The objectives of the work described in this paper are; (a) to develop a mathematical model of heat and mass transfer to and through a frost layer growing on a single tube in crossflow when environmental conditions are steady and; (b) to demonstrate that the model predicts published experimental results reasonably well. Mathematical models are developed for frost growth in the regimes (a) when vapour diffusion dominates, and (b) when the frost surface temperature reaches 0° C. The model predictions are compared to published results for (a) heat transfer, (b) mass transfer, and (c) frost depth. The range of parameters studied are: Reynolds number, 2 500 to 16 000; cylinder surface temperature, −5°C to −18°C; air temperature, 5°C to 16°C; length of frosting test, three to eight hours. There is generally good agreement between the experimental and simulation results. The paper's unique contributions to the literature are (a) a new "meltback" model for frost growth is presented and (b), for the first time, experiment-model comparisons for heat and mass transfer on frosting cylinders in cross-flow are presented.