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NUMERICAL STUDY OF HEAT TRANSFER IN LASER IRRADIATED BIOLOGICAL TISSUE WITHIN THE FRAMEWORK OF DUAL-PHASE-LAG HEAT CONDUCTION MODEL USING LATTICE BOLTZMANN METHOD

DOI: 10.1615/ICHMT.2015.IntSympAdvComputHeatTransf.250
page 292

Shashank Patidar
Department of Energy Science and Engineering, Indian Institute Technology, Bombay, Powai, Mumbai-400076, India

SUMIT KUMAR
IIT KHARAGPUR

Atul Srivastava
Department of Mechanical Engineering, Indian Institute of Technology Bombay, Powai – 400076, Mumbai, India

Suneet Singh
Dept. of Energy Science and Engineering, Indian Institute of Technology Bombay, Powai, Mumbai 400076, India

Résumé

The present study is concerned with numerical investigation of thermal response of laser irradiated biological tissue during laser-based photo-thermal therapy. The concept of the Lattice Boltzmann Method (LBM) is extended to analyze transport of short-pulse radiation within the body of the tissue phantom which has been considered as the participating medium. In order to determine the two-dimensional temperature distribution inside the tissue medium, the radiative transfer equation (RTE) has been coupled with the energy equation based on dual phase lag (DPL) heat conduction framework. The coupled RTE and DPL-based numerical code developed in the present work has been benchmarked against the results published in the literature for the same operating parameters. The present study is important in context of optimizing the efficiency of photo thermal therapy since DPL heat conduction model predicted significantly different temperature in tissue from hyperbolic and Fourier's heat conduction model. Effect of phase lag in heat flux (τT) and phase lag in temperature gradient (τq) on the temperature distribution inside the laser irradiated tissue has been analyzed.

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