In-Situ Study of Physical Properties and Structure of Atmospheric Ice

Abstract

This project focused on the following in situ measurements of the physical properties and structure of atmospheric ice during its growth to add to the fundamental data of atmospheric icing. (1) A new approach to determine the volumetric liquid fraction in growing atmospheric ice from in-situ measurements of capacitance and conductance was proposed. Assuming a combination model of series and parallel connections between water and ice parts of atmospheric ice, we were able to determine the time-variation of the liquid fraction from the in-situ measurements. (2) A simple technique for measuring the adhesion strength of atmospheric ice to a stainless wire during ice growth was developed and conducted. Data analysis shows that the freezing process, related to the ice temperature and the phase change of water, and the porosity of ice affect the ice adhesion. Those two factors can explain the experimental data.

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Document Details

Document Type
Technical Report
Publication Date
May 31, 2006
Accession Number
ADA455390

Entities

People

  • Victor F. Petrenko

Tags

Communities of Interest

  • Advanced Electronics
  • Air Platforms
  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Adhesion
  • Air Temperature
  • Circuit Boards
  • Crystal Structure
  • Data Analysis
  • Dielectric Permittivity
  • Electric Fields
  • Electrical Properties
  • Engineering
  • Ice Formation
  • Measurement
  • Physical Properties
  • Printed Circuits
  • Simulations
  • Stainless Steel
  • Time Dependence
  • Wind Tunnels

Fields of Study

  • Environmental science

Readers

  • Materials Science and Engineering.
  • Polar and Arctic Studies
  • Thin Film Deposition Science.