Modeling of frost growth and frost properties with airflow over a flat plate

Rin Yun, Yong Chan Kim, Man Ki Min

Research output: Contribution to journalArticle

67 Citations (Scopus)

Abstract

A physical model of frost layer growth and frost properties with airflow over a flat plate at subfreezing temperature was developed. Frost roughness was measured, and an empirical correlation for the average frost roughness was suggested. Heat and mass transfer coefficients were calculated using the modified Prandtl mixing-length scheme containing the effects of both frost roughness and turbulent boundary layer thickness. Frost thermal conductivity was theoretically analyzed by solving the combined equations of air equivalent conductivity and thermal conductivity of the frost inner layer. Based on the present model, heat and mass transfer coefficient, frost thermal conductivity, frost thickness, frost mass concentration and frost density with time and space were estimated. The model showed good agreement with the basic trends of the test data taken from other literature. Spatial and temporal changes of heat flux and frost surface temperature were also investigated.

Original languageEnglish
Pages (from-to)362-371
Number of pages10
JournalInternational Journal of Refrigeration
Volume25
Issue number3
DOIs
Publication statusPublished - 2002 May 1

Fingerprint

Thermal Conductivity
frost
air flow
Thermal conductivity
Hot Temperature
Surface roughness
Heat transfer coefficients
Mass transfer
Growth
Temperature
Heat flux
thermal conductivity
Boundary layers
roughness
Air
mass transfer
heat transfer
physical models
space and time
surface temperature

Keywords

  • Cooling
  • Development
  • Flat plate
  • Frost
  • Frost formation
  • Humid air
  • Modelling
  • Physical property

ASJC Scopus subject areas

  • Food Science
  • Mechanical Engineering

Cite this

Modeling of frost growth and frost properties with airflow over a flat plate. / Yun, Rin; Kim, Yong Chan; Min, Man Ki.

In: International Journal of Refrigeration, Vol. 25, No. 3, 01.05.2002, p. 362-371.

Research output: Contribution to journalArticle

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AB - A physical model of frost layer growth and frost properties with airflow over a flat plate at subfreezing temperature was developed. Frost roughness was measured, and an empirical correlation for the average frost roughness was suggested. Heat and mass transfer coefficients were calculated using the modified Prandtl mixing-length scheme containing the effects of both frost roughness and turbulent boundary layer thickness. Frost thermal conductivity was theoretically analyzed by solving the combined equations of air equivalent conductivity and thermal conductivity of the frost inner layer. Based on the present model, heat and mass transfer coefficient, frost thermal conductivity, frost thickness, frost mass concentration and frost density with time and space were estimated. The model showed good agreement with the basic trends of the test data taken from other literature. Spatial and temporal changes of heat flux and frost surface temperature were also investigated.

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