APPARENT THERMAL DIFFUSIVITY OF COMPOSITE FABRIC LAYERS

Abstract

A mathematical derivation of an apparent thermal diffusivity for a generalized composite fabric system consisting of different cloth layers is presented to provide a parameter for analysis of unidimensional heat flow in a clothing system. An experimental method is described for obtaining the apparent thermal diffusivity as a general solution to Fourier's Conduction Equation, using a boundary step change on a semi-infinite solid composed of dissimilar fabric layers. Also presented are several specific examples of transient heat flow in dual layer systems. The apparent diffusivities of each system are obtained both theoretically and experimentally, and the results compared graphically.

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Document Details

Document Type
Technical Report
Publication Date
Jul 01, 1961
Accession Number
AD0276838

Entities

People

  • Francis W. Botsch
  • James J. Powers
  • Michael J. Sacco

Tags

Communities of Interest

  • Biomedical
  • Ground and Sea Platforms
  • Weapons Technologies

DTIC Thesaurus Topics

  • Boundaries
  • Clothing
  • Conductivity
  • Diffusivity
  • Engineering
  • Environmental Protection
  • Equations
  • Fabrics
  • Heat Capacity
  • Heat Transfer
  • Heat Transmission
  • Materials
  • Mathematical Analysis
  • Military Research
  • Specific Heat
  • Thermal Conductivity
  • Thermal Diffusivity

Readers

  • Electromagnetic Wave Scattering and Antenna Radiation Engineering
  • Fluid Mechanics and Fluid Dynamics.
  • Materials Science