ANALYSIS OF THE DPL BIO-HEAT TRANSFER EQUATION WITH CONSTANT AND TIME-DEPENDENT HEAT FLUX CONDITIONS ON SKIN SURFACE

Abstract

This article focuses on temperature response of skin tissue due to time dependent surface heat fluxes. Analytical solution is constructed for DPL bioheat transfer equation with constant, periodic and pulse train heat flux conditions on skin surface. Separation of variables and Duhamel's theorem for a skin tissue as a finite domain are employed. The transient temperature responses for constant and time-dependent boundary conditions are obtained and discussed. The results show that there is major discrepancy between the predicted temperature of parabolic (Pennes bio-heat transfer), hyperbolic (thermal wave) and DPL bio-heat transfer models when high heat flux accidents on the skin surface with a short duration or propagation speed of thermal wave is finite. The results illustrate that the DPL model reduces to the hyperbolic model when τT approaches zero and the classic Fourier model when both thermal relaxations approach zero. However for τq = τT the DPL model anticipates different temperature distribution with that predicted by the Pennes model. Such discrepancy is due to the blood perfusion term in energy equation. It is in contrast to results from the literature for pure conduction material, where the DPL model approaches the Fourier heat conduction model when τq = τT. The burn injury is also investigated.

Keywords

Dates

  • Submission Date2014-01-28
  • Revision Date2014-04-08
  • Acceptance Date2014-04-09
  • Online Date2014-05-04

DOI Reference

10.2298/TSCI140128057Z

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