Microscopic Characterization of Frost Surface During Liquid-Ice Phase Change Period

DOI PDF 1 Citations
  • Y. L. Hao
    Florida International University, Miami, FL
  • J. Iragorry
    Florida International University, Miami, FL
  • D. Castro
    Florida International University, Miami, FL
  • Y.-X. Tao
    Florida International University, Miami, FL
  • S. Jia
    Heatcraft Refrigeration Products, Inc., Stone Mountain, GA

Description

<jats:p>In response to the need for developing a better model to predict frost formation and defrosting processes in freezer and evaporator applications, a microscopic analysis of frost growth on a flat surface is conducted to determine the microscopic characteristics of a frost layer during the early growth period when sub-cooled droplets are formed and changed to the ice. The surface characterization is performed by employing the holographic interferometry technique to determine the air-frost interface temperature, and the video microscope to determine the mean droplet size and ice particle fractions. Typical experimental results are presented to demonstrate the test technique. Preliminary experimentally determined frost thickness and air-frost interface temperature are compared with simulation results.</jats:p>

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