Multi-time-scale heat transfer modeling of turbid tissues exposed to short-pulsed irradiations

K Kim, Z Guo - Computer Methods and Programs in Biomedicine, 2007 - Elsevier
K Kim, Z Guo
Computer Methods and Programs in Biomedicine, 2007Elsevier
A combined hyperbolic radiation and conduction heat transfer model is developed to
simulate multi-time-scale heat transfer in turbid tissues exposed to short-pulsed irradiations.
An initial temperature response of a tissue to an ultrashort pulse irradiation is analyzed by
the volume-average method in combination with the transient discrete ordinates method for
modeling the ultrafast radiation heat transfer. This response is found to reach pseudo steady
state within 1ns for the considered tissues. The single pulse result is then utilized to obtain …
A combined hyperbolic radiation and conduction heat transfer model is developed to simulate multi-time-scale heat transfer in turbid tissues exposed to short-pulsed irradiations. An initial temperature response of a tissue to an ultrashort pulse irradiation is analyzed by the volume-average method in combination with the transient discrete ordinates method for modeling the ultrafast radiation heat transfer. This response is found to reach pseudo steady state within 1ns for the considered tissues. The single pulse result is then utilized to obtain the temperature response to pulse train irradiation at the microsecond/millisecond time scales. After that, the temperature field is predicted by the hyperbolic heat conduction model which is solved by the MacCormack's scheme with error terms correction. Finally, the hyperbolic conduction is compared with the traditional parabolic heat diffusion model. It is found that the maximum local temperatures are larger in the hyperbolic prediction than the parabolic prediction. In the modeled dermis tissue, a 7% non-dimensional temperature increase is found. After about 10 thermal relaxation times, thermal waves fade away and the predictions between the hyperbolic and parabolic models are consistent.
Elsevier
Showing the best result for this search. See all results