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UNSTEADY HEAT FLOW BETWEEN SOLIDS WITH PARTIALLY CONTACTING INTERFACE.

Author(s) : SADHAL S. S.

Type of article: Article

Summary

THE PROBLEM OF THE TRANSIENT THERMAL RESPONSE OF TWO SEMIINFINITE SOLIDS NOT MAKING PERFECT CONTACT, IS TREATED ANALYTICALLY BY MODELLING THE INTERFACE TO BE A SERIES OF EQUALLY SPACED STRIPS MAKING PERFECT CONTACT. THE REMAINING AREA IS ASSUMED TO BE PERFECTLY INSULATED, ANDA CRITERION IS ESTABLISHED FOR THE VALIDITY OF THIS ASSUMPTION, TAKING RADIATION INTO CONSIDERATION. THE MIXED INTERFACE CONDITIONS PRESENT A CONSIDERABLE DIFFICULTY AND A LONG-TIME PERTURBATION SCHEME IS THEREFORE USED TO OBTAIN APPROXIMATE EXPRESSIONS FOR THE TRANSIENT TEMPERATURE DISTRIBUTIONS, AVERAGE HEAT FLUX AND THE THERMAL CONTACT RESISTANCE. THE METHOD IS APPLICABLE TO A LARGE CLASS OF PROBLEMS WITH MIXED BOUNDARY CONDITIONS FOR WHICH THE EXISTING TECHNIQUES GIVE EXACT SOLUTIONS ONLY FOR THE STEADY STATE.

Details

  • Original title: UNSTEADY HEAT FLOW BETWEEN SOLIDS WITH PARTIALLY CONTACTING INTERFACE.
  • Record ID : 1982-0039
  • Languages: English
  • Source: J. Heat Transf. - vol. 103 - n. 1
  • Publication date: 1981/02
  • Document available for consultation in the library of the IIR headquarters only.

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