A method for predicting thermal waves in dual-phase-lag heat conduction

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

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Original languageEnglish
Pages (from-to)250-257
Journal / PublicationInternational Journal of Heat and Mass Transfer
Online published20 Jul 2017
Publication statusPublished - Dec 2017
Externally publishedYes


We predict whether thermal waves exist or not in dual-phase-lag heat conduction by measuring the time lag ratio (τq/τT. In this method, a one-dimensional model of cylindrical heating is developed and solved by the method of Laplace transform. The time lag ratio is then derived from the time derivative of the square of excess temperature on the heater wall in the initial heating stage. Experimentally, we also applied this method to measure the time lag ratios for sand and lean pork, both of which are less than 1 within acceptable measurement uncertainty, indicating no thermal waves generated. This method is of great importance for the application of dual-phase-lag heat conduction model since it can predict existence of thermal waves through a simple experiment.

Research Area(s)

  • Dual-phase-lag heat conduction, Experimental method, Thermal wave, Time lag ratio