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An advanced computational bioheat transfer model for a human body with an embedded systemic circulation / Alberto Coccarelli, Etienne Boileau, Dimitris Parthimos, Perumal Nithiarasu

Biomechanics and Modeling in Mechanobiology, Volume: 15, Issue: 5, Pages: 1173 - 1190

Swansea University Authors: Alberto Coccarelli, Perumal Nithiarasu

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Abstract

In the present work, an elaborate one-dimensional thermofluid model for a human body is presented. By contrast to the existing pure conduction-/perfusion-based models, the proposed methodology couples the arterial fluid dynamics of a human body with a multi-segmental bioheat model of surrounding sol...

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Published in: Biomechanics and Modeling in Mechanobiology
ISSN: 1617-7959 1617-7940
Published: 2016
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URI: https://cronfa.swan.ac.uk/Record/cronfa49815
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By contrast to the existing pure conduction-/perfusion-based models, the proposed methodology couples the arterial fluid dynamics of a human body with a multi-segmental bioheat model of surrounding solid tissues. In the present configuration, arterial flow is included through a network of elastic vessels. More than a dozen solid segments are employed to represent the heat conduction in the surrounding tissues, and each segment is constituted by a multilayered circular cylinder. Such multi-layers allow flexible delineation of the geometry and incorporation of properties of different tissue types. The coupling of solid tissue and fluid models requires subdivision of the arterial circulation into large and small arteries. The heat exchange between tissues and arterial wall occurs by convection in large vessels and by perfusion in small arteries. The core region, including the heart, provides the inlet conditions for the fluid equations. In the proposed model, shivering, sweating, and perfusion changes constitute the basis of the thermoregulatory system. The equations governing flow and heat transfer in the circulatory system are solved using a locally conservative Galerkin approach, and the heat conduction in the surrounding tissues is solved using a standard implicit backward Euler method. To investigate the effectiveness of the proposed model, temperature field evolutions are monitored at different points of the arterial tree and in the surrounding tissue layers. To study the differences due to flow-induced convection effects on thermal balance, the results of the current model are compared against those of the widely used modelling methodologies. The results show that the convection significantly influences the temperature distribution of the solid tissues in the vicinity of the arteries. Thus, the inner convection has a more predominant role in the human body heat balance than previously thought. 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spelling 2021-01-15T10:25:40.9788575 v2 49815 2019-03-29 An advanced computational bioheat transfer model for a human body with an embedded systemic circulation 06fd3332e5eb3cf4bb4e75a24f49149d 0000-0003-1511-9015 Alberto Coccarelli Alberto Coccarelli true false 3b28bf59358fc2b9bd9a46897dbfc92d 0000-0002-4901-2980 Perumal Nithiarasu Perumal Nithiarasu true false 2019-03-29 MECH In the present work, an elaborate one-dimensional thermofluid model for a human body is presented. By contrast to the existing pure conduction-/perfusion-based models, the proposed methodology couples the arterial fluid dynamics of a human body with a multi-segmental bioheat model of surrounding solid tissues. In the present configuration, arterial flow is included through a network of elastic vessels. More than a dozen solid segments are employed to represent the heat conduction in the surrounding tissues, and each segment is constituted by a multilayered circular cylinder. Such multi-layers allow flexible delineation of the geometry and incorporation of properties of different tissue types. The coupling of solid tissue and fluid models requires subdivision of the arterial circulation into large and small arteries. The heat exchange between tissues and arterial wall occurs by convection in large vessels and by perfusion in small arteries. The core region, including the heart, provides the inlet conditions for the fluid equations. In the proposed model, shivering, sweating, and perfusion changes constitute the basis of the thermoregulatory system. The equations governing flow and heat transfer in the circulatory system are solved using a locally conservative Galerkin approach, and the heat conduction in the surrounding tissues is solved using a standard implicit backward Euler method. To investigate the effectiveness of the proposed model, temperature field evolutions are monitored at different points of the arterial tree and in the surrounding tissue layers. To study the differences due to flow-induced convection effects on thermal balance, the results of the current model are compared against those of the widely used modelling methodologies. The results show that the convection significantly influences the temperature distribution of the solid tissues in the vicinity of the arteries. Thus, the inner convection has a more predominant role in the human body heat balance than previously thought. To demonstrate its capabilities, the proposed new model is used to study different scenarios, including thermoregulation inactivity and variation in surrounding atmospheric conditions. Journal Article Biomechanics and Modeling in Mechanobiology 15 5 1173 1190 1617-7959 1617-7940 Systemic circulation, Bioheat transfer, Heat conduction, Convection, Perfusion, Thermoregulation, Finite element method 1 10 2016 2016-10-01 10.1007/s10237-015-0751-4 COLLEGE NANME Mechanical Engineering COLLEGE CODE MECH Swansea University 2021-01-15T10:25:40.9788575 2019-03-29T14:35:24.0653056 College of Engineering Engineering Alberto Coccarelli 0000-0003-1511-9015 1 Etienne Boileau 2 Dimitris Parthimos 3 Perumal Nithiarasu 0000-0002-4901-2980 4 0049815-13052019114331.pdf coccarelli2015v2.pdf 2019-05-13T11:43:31.5870000 Output 6807257 application/pdf Version of Record true 2019-05-13T00:00:00.0000000 Distributed under the terms of a Creative Commons Attribution (CC-BY-4.0) true eng
title An advanced computational bioheat transfer model for a human body with an embedded systemic circulation
spellingShingle An advanced computational bioheat transfer model for a human body with an embedded systemic circulation
Alberto, Coccarelli
Perumal, Nithiarasu
title_short An advanced computational bioheat transfer model for a human body with an embedded systemic circulation
title_full An advanced computational bioheat transfer model for a human body with an embedded systemic circulation
title_fullStr An advanced computational bioheat transfer model for a human body with an embedded systemic circulation
title_full_unstemmed An advanced computational bioheat transfer model for a human body with an embedded systemic circulation
title_sort An advanced computational bioheat transfer model for a human body with an embedded systemic circulation
author_id_str_mv 06fd3332e5eb3cf4bb4e75a24f49149d
3b28bf59358fc2b9bd9a46897dbfc92d
author_id_fullname_str_mv 06fd3332e5eb3cf4bb4e75a24f49149d_***_Alberto, Coccarelli
3b28bf59358fc2b9bd9a46897dbfc92d_***_Perumal, Nithiarasu
author Alberto, Coccarelli
Perumal, Nithiarasu
author2 Alberto Coccarelli
Etienne Boileau
Dimitris Parthimos
Perumal Nithiarasu
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description In the present work, an elaborate one-dimensional thermofluid model for a human body is presented. By contrast to the existing pure conduction-/perfusion-based models, the proposed methodology couples the arterial fluid dynamics of a human body with a multi-segmental bioheat model of surrounding solid tissues. In the present configuration, arterial flow is included through a network of elastic vessels. More than a dozen solid segments are employed to represent the heat conduction in the surrounding tissues, and each segment is constituted by a multilayered circular cylinder. Such multi-layers allow flexible delineation of the geometry and incorporation of properties of different tissue types. The coupling of solid tissue and fluid models requires subdivision of the arterial circulation into large and small arteries. The heat exchange between tissues and arterial wall occurs by convection in large vessels and by perfusion in small arteries. The core region, including the heart, provides the inlet conditions for the fluid equations. In the proposed model, shivering, sweating, and perfusion changes constitute the basis of the thermoregulatory system. The equations governing flow and heat transfer in the circulatory system are solved using a locally conservative Galerkin approach, and the heat conduction in the surrounding tissues is solved using a standard implicit backward Euler method. To investigate the effectiveness of the proposed model, temperature field evolutions are monitored at different points of the arterial tree and in the surrounding tissue layers. To study the differences due to flow-induced convection effects on thermal balance, the results of the current model are compared against those of the widely used modelling methodologies. The results show that the convection significantly influences the temperature distribution of the solid tissues in the vicinity of the arteries. Thus, the inner convection has a more predominant role in the human body heat balance than previously thought. To demonstrate its capabilities, the proposed new model is used to study different scenarios, including thermoregulation inactivity and variation in surrounding atmospheric conditions.
published_date 2016-10-01T04:11:09Z
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