Record Details

Thermal analysis of laser-irradiated tissue phantoms using dual phase lag model coupled with transient radiative transfer equation

DSpace at IIT Bombay

View Archive Info
 
 
Field Value
 
Title Thermal analysis of laser-irradiated tissue phantoms using dual phase lag model coupled with transient radiative transfer equation
 
Creator KUMAR, S
SRIVASTAVA, A
 
Subject DISCRETE-ORDINATES METHOD
LIGHT-PULSE TRANSPORT
HEAT-CONDUCTION
BIOLOGICAL TISSUES
OPTICAL-PROPERTIES
ABSORBING MEDIA
PROCESSED MEAT
LIVING TISSUES
SCATTERING
CHALEUR
Photo-thermal therapy
Bio-heat transfer
Radiative transfer equation
Dual phase lag model
Optical inhomogeneities
 
Description The present work is concerned with the development and application of dual phase lag (DPL) based heat conduction model for investigating the thermal response of laser-irradiated biological tissue phantoms. The developed heat transfer model has been coupled with the transient form of radiative transfer equation (RTE) that describes the phenomena of light propagation inside the tissue phantom. The RTE has been solved using the discrete ordinate method (DOM) to determine the 2-D distribution of light intensity within the tissue phantom, while finite volume method (FVM) based discretization scheme has been employed for solving the heat transfer model. The developed numerical model has first been verified against the results available in the literature. The results obtained in the form of temperature distribution through DPL model have been compared with conventional Fourier heat conduction model as well as with hyperbolic model. The effects of two phase lags terms in the form of relaxation times i.e. tau(T) and tau(q) associated with DPL model on the resultant thermal profiles have been investigated. Thereafter, the temperature distribution inside the biological tissue phantom embedded with optical inhomogeneities of varying contrast levels have been determined using the DPL-based model. Here the optical inhomogeneities represent the malignant (absorbing inhomogeneity) and benign (scattering inhomogeneity) cells present in an otherwise homogeneous medium. Results of the study reveal that the hyperbolic heat conduction model consistently predicts high temperature values and also the associated thermal profiles exhibit the largest amplitude of oscillations throughout the body of the tissue phantom. The DPL-based model results into relatively lesser oscillations due to the coupled effects of tau(T) and tau(q). The conventional Fourier model, on the other hand, results into the lowest temperature values without any oscillations in the temperature profiles. The effect of the presence of varying nature of optical inhomogeneities is also brought out quite clearly using the developed DPL-based heat conduction model. (C) 2015 Elsevier Ltd. All rights reserved.
 
Publisher PERGAMON-ELSEVIER SCIENCE LTD
 
Date 2016-01-14T13:56:39Z
2016-01-14T13:56:39Z
2015
 
Type Article
 
Identifier INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER, 90,466-479
0017-9310
1879-2189
http://dx.doi.org/10.1016/j.ijheatmasstransfer.2015.06.077
http://dspace.library.iitb.ac.in/jspui/handle/100/17668
 
Language en