年間 18 号発行
ISSN 印刷: 1064-2285
ISSN オンライン: 2162-6561
Indexed in
CYLINDRICAL COORDINATE SYSTEM-BASED FORMULATION TO INVESTIGATE THERMAL RESPONSE OF LASER-IRRADIATED TISSUE PHANTOMS USING NON-FOURIER HEAT CONDUCTION MODELS
要約
Phenomenon of heat transfer through the body of biological tissue phantoms has been numerically modelled in cylindrical coordinate system. The tissue phantom has been subjected to a train of short pulse laser irradiation. Time history of intensity distribution within the phantom has been determined through FVM-based solution of transient radiative transfer equation (RTE). The solution of RTE has been coupled with one of the most generalised non-Fourier heat conduction models, i.e. dual phase lag (DPL) model to determine the temperature field. The numerical methodology developed has been verified against the results reported in the literature. The DPL-based temperature predictions have been compared with those of Fourier and hyperbolic models. Effects of relaxation times associated with temperature gradient (τT) and heat flux (τq) have been investigated. Results reveal that non-Fourier models predict substantially higher temperature levels compared to that for the Fourier model. The studies performed to analyse the effects of τT and τq on temperature response show that τq induces wave nature to the thermal fronts propagating in the tissue medium. On the other hand, τT tends to smoothen the wave nature of sharp thermal wave fronts induced by τq. Effects of absorption inhomogeneity on temperature distributions have been captured quite well. To the best of our knowledge, the work presented is one of the first attempts to develop the cylindrical coordinate system-based numerical methodology for coupling the transient form of RTE to the most generalised non-Fourier model (dual phase lag model) and holds it importance in therapeutic applications of short pulse lasers.
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Shomali Zahra, Kovács Róbert, Ván Péter, Kudinov Igor Vasilievich, Ghazanfarian Jafar, Lagging heat models in thermodynamics and bioheat transfer: a critical review, Continuum Mechanics and Thermodynamics, 34, 3, 2022. Crossref
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Kishore Pankaj, Kumar Sumit, Patel Vipul M., Conjugate heat transfer analysis of laser-irradiated cylindrical-shaped biological tissue embedded with the optical inhomogeneity, International Communications in Heat and Mass Transfer, 137, 2022. Crossref