Abstract
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.
Original language | English |
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Pages (from-to) | 250-257 |
Number of pages | 8 |
Journal | International Journal of Heat and Mass Transfer |
Volume | 115 |
DOIs | |
Publication status | Published - 2017 |
Externally published | Yes |
Keywords
- Dual-phase-lag heat conduction
- Experimental method
- Thermal wave
- Time lag ratio
ASJC Scopus subject areas
- Condensed Matter Physics
- Mechanical Engineering
- Fluid Flow and Transfer Processes