Journal ArticleDOI
A New Simplified Bioheat Equation for the Effect of Blood Flow on Local Average Tissue Temperature
Sheldon Weinbaum,Latif M. Jiji +1 more
TLDR
A new simplified three-dimensional bioheat equation is derived to describe the effect of blood flow on blood-tissue heat transfer and shows that the vascularization of tissue causes it to behave as an anisotropic heat transfer medium.Abstract:
A new simplified three-dimensional bioheat equation is derived to describe the effect of blood flow on blood-tissue heat transfer. In two recent theoretical and experimental studies [1, 2] the authors have demonstrated that the so-called isotropic blood perfusion term in the existing bioheat equation is negligible because of the microvascular organization, and that the primary mechanism for blood-tissue energy exchange is incomplete countercurrent exchange in the thermally significant microvessels. The new theory to describe this basic mechanism shows that the vascularization of tissue causes it to behave as an anisotropic heat transfer medium. A remarkably simple expression is derived for the tensor conductivity of the tissue as a function of the local vascular geometry and flow velocity in the thermally significant countercurrent vessels. It is also shown that directed as opposed to isotropic blood perfusion between the countercurrent vessels can have a significant influence on heat transfer in regions where the countercurrent vessels are under 70-micron diameter. The new bioheat equation also describes this mechanism.read more
Citations
More filters
Book
Advances in Electromagnetic Fields in Living Systems
TL;DR: In this article, the charge-to-mass ICR Signature in Weak ELF Bioelectromagnetic Effects was used to detect weak ELF bioelectromagnetism effects.
Journal ArticleDOI
Thermodynamic optimization of flow geometry in mechanical and civil engineering
Adrian Bejan,Sylvie Lorente +1 more
TL;DR: In this paper, a review of recent developments in thermodynamic optimization is reviewed by focusing on the generation of optimal geometric form (shape, structure, topology) in flow systems.
Journal ArticleDOI
Analytical analysis of the dual-phase-lag model of bioheat transfer equation during transient heating of skin tissue
TL;DR: In this paper, a dual-phase-lag model of bioheat transfer equation is utilized in treating the transient heat transfer problems in skin tissue considering prevalent heating conditions in thermal therapy applications, namely, pulse train and periodic heat flux.
Journal ArticleDOI
Modeling Heat Transfer in Tumors: A Review of Thermal Therapies
TL;DR: The purpose of this review is to give a clear overview of how the bioheat models have been modified when applied in various hyperthermia treatments of cancer.
Journal ArticleDOI
Analytical study on the transient heating of a two-dimensional skin tissue using parabolic and hyperbolic bioheat transfer equations
TL;DR: In this article, exact analytical analysis of two-dimensional Fourier and non-Fourier bioheat transfer equations in skin tissue exposed to an instantaneous heating condition is presented, where the effects of blood perfusion and metabolic heat generation on the tissue thermal behavior are considered.