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FROST GROWTH PARAMETERS IN A FORCED AIR STREAM.

Author(s) : OSTIN R., ANDERSSON S.

Type of article: Article

Summary

THE FORMATION OF FROST ON PARALLEL HORIZONTAL PLATES FACING A FORCED AIR STREAM IS STUDIED AT VARYING TEMPERATURES, RELATIVE HUMIDITIES AND AIR VELOCITIES. BOTH THE SURFACE TEMPERATURE OF THE PLATES AND THE RELATIVE HUMIDITY OF THE AIR STREAM ARE FOUND TO HAVE IMPORTANT EFFECTS FOR THE FROST THICKNESS. THE DENSITY OF FROST IS FOUND TO INCREASE WITH RELATIVE HUMIDITY AND ESPECIALLY AIR VELOCITY. A DYNAMIC ONE STRIP METHOD IS APPLIED TO DETERMINE THE THERMAL CONDUCTIVITY. TWO CATEGORIES OF FROST FORMATION ARE OBSERVED: MONOTONIC AND CYCLIC GROWTH. IN THE FORMER IT IS FOUND THAT THE CONDENSED WATER VAPOUR CONTRIBUTION IN EQUAL AMOUNTS TO INCREASES IN THE THICKNESS AND THE DENSITY WHILE IN THE LATTER MELTING AT THE FROST SURFACE RESULTS IN ABRUPT INTERNAL DENSIFICATION.

Details

  • Original title: FROST GROWTH PARAMETERS IN A FORCED AIR STREAM.
  • Record ID : 1992-0545
  • Languages: English
  • Source: International Journal of Heat and Mass Transfer - vol. 34 - n. 4-5
  • Publication date: 1991/04

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