Relevant bibliographies by topics / Bio-heat transfer

Academic literature on the topic 'Bio-heat transfer'

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Published: 4 June 2021
Last updated: 2 February 2022

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Journal articles on the topic "Bio-heat transfer"

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Nyborg, W. L. "Solutions of the bio-heat transfer equation." Physics in Medicine and Biology 33, no. 7 (July 1, 1988): 785–92. http://dx.doi.org/10.1088/0031-9155/33/7/002.

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Hagiwara, Yoshimichi. "A21 Bio-mimetic Control of Heat Transfer." Proceedings of the Thermal Engineering Conference 2007 (2007): 57–60. http://dx.doi.org/10.1299/jsmeted.2007.57.

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Narasimhan, Arunn, and Kaushal Kumar Jha. "Bio-heat transfer simulation of retinal laser irradiation." International Journal for Numerical Methods in Biomedical Engineering 28, no. 5 (January 27, 2012): 547–59. http://dx.doi.org/10.1002/cnm.1489.

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Nyborg, W. L., and Junru Wu. "Solution of the linear bio-heat transfer equation." Physics in Medicine and Biology 39, no. 5 (May 1, 1994): 924–26. http://dx.doi.org/10.1088/0031-9155/39/5/012.

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HOCHMUTH, REINHARD, and PETER DEUFLHARD. "MULTISCALE ANALYSIS FOR THE BIO-HEAT TRANSFER EQUATION — THE NONISOLATED CASE." Mathematical Models and Methods in Applied Sciences 14, no. 11 (November 2004): 1621–34. http://dx.doi.org/10.1142/s0218202504003775.

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The bio-heat transfer equation is a macroscopic model for describing the heat transfer in microvascular tissue. In Ref. 8 the authors applied homogenization techniques to derive the bio-heat transfer equation as asymptotic result of boundary value problems which provide a microscopic description for microvascular tissue. Here those results are generalized to a geometrical setting where the regions of blood are allowed to be connected, which covers more biologically relevant geometries. Moreover, asymptotic corrector results are derived under weaker assumptions.
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Consiglieri, Luisa. "An Analytical Solution for a Bio-heat Transfer Problem." International Journal of Bio-Science and Bio-Technology 5, no. 5 (October 31, 2013): 267–78. http://dx.doi.org/10.14257/ijbsbt.2013.5.5.26.

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Li, Zheng, Xianchen Xu, Kuojiang Li, Yangyang Chen, Zhaoqing Ke, Sheng Wang, Hsiu-Hung Chen, Guoliang Huang, Chung-Lung Chen, and Chien-Hua Chen. "Bio-inspired self-agitator for convective heat transfer enhancement." Applied Physics Letters 113, no. 11 (September 10, 2018): 113703. http://dx.doi.org/10.1063/1.5046502.

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Huang, H. W., C. L. Chan, and R. B. Roemer. "Analytical Solutions of Pennes Bio-Heat Transfer Equation With a Blood Vessel." Journal of Biomechanical Engineering 116, no. 2 (May 1, 1994): 208–12. http://dx.doi.org/10.1115/1.2895721.

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The heat transfer within a perfused tissue in the presence of a vessel is considered. The bio-heat transfer equation is used for the perfused tissue and a lumped capacitance analysis is used for the convection in the vessel with a constant Nusselt number. Analytical solutions are obtained for two cases: (i) the arterial temperature of the perfused blood in the bio-heat transfer equation is equal to the axially varying mixed mean temperature of the blood in the vessel and, (ii) that arterial temperature is assumed to be constant. Dimensionless equilibrium length and temperature expressions are obtained and presented.
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Zou, Hui Fen, Ying Chao Fei, and Min Yu. "Brief Analysis of the Heat and Mass Balance in Sludge Bio-Drying Process." Advanced Materials Research 518-523 (May 2012): 34–38. http://dx.doi.org/10.4028/www.scientific.net/amr.518-523.34.

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Bio-drying is an important method to reduce the excess sludge which use the inner biomass of sludge itself to generate heat for a water discharging has a broad prospects in sludge treatment. However, our research in this field is still very limited. In order to better mastering and promoting sludge bio-drying technology, this paper summarized the advantages of bio-drying, initially described the microbial mechanism of spontaneous heat generation and the heat and mass transfer phenomena in a bio-drying process, then build a macro heat conservation formula based on material conservation.
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Park, Hoon Chae, Hang Seok Choi, and Ji Eun Lee. "Heat transfer of bio-oil in a direct contact heat exchanger during condensation." Korean Journal of Chemical Engineering 33, no. 4 (February 4, 2016): 1159–69. http://dx.doi.org/10.1007/s11814-015-0256-y.

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Dissertations / Theses on the topic "Bio-heat transfer"

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Tsafnat, Naomi Graduate School of Biomedical Engineering Faculty of Engineering UNSW. "Numerical modelling of ferromagnetic embolisation hyperthermia in the treatment of liver cancer." Awarded by:University of New South Wales. Graduate School of Biomedical Engineering, 2005. http://handle.unsw.edu.au/1959.4/23378.

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Both primary and secondary liver cancers are common and the majority of patients are not eligible for surgical resection or a liver transplant, which are considered the only hope of cure. Mortality rates are high and there is a need for alternative treatment options. New forms of local treatment work best on small tumours; large ones, however, remain difficult to treat. Hyperthermia involves heating tumours to 40??-44?? C. The aim is to heat the entire tumour without damaging the surrounding normal tissue. Treating deep seated tumours is technically challenging. Ferromagnetic embolisation hyperthermia (FEH) is a novel method of treating liver tumours. Magnetic microspheres are infused into the hepatic artery and lodge primarily in the tumour periphery. An applied alternating-current magnetic field causes the microspheres to heat. Animal experiments have shown that this is a promising technique. There is a need for modelling of FEH prior to commencement of clinical trials. Analytical and numerical models of tumour heating during FEH treatment are presented here. The models help predict the temperature distributions that are likely to arise during treatment and give insight into the factors affecting tumour and liver heating. The models incorporate temperature-dependent thermal properties and blood perfusion rates of the tissues and a heterogeneous clustering of microspheres in the tumour periphery. Simulations show that the poorly perfused tumours heat preferentially while the liver is effectively cooled by blood flow from the portal vein. A peripheral distribution of heat sources produces a more even temperature field throughout the tumour, compared to a heat source that is centred within the tumour core. Large tumours reach higher temperatures and have higher heating rates, supporting experimental findings. Using temperature-dependent, rather than constant, values for thermal conductivities and blood perfusion rates results in higher temperatures within the tumour. The uneven clustering of microspheres in the tumour periphery leads to a more heterogeneous temperature distribution in the core, but it has less of an effect on the wellperfused liver. The results show that FEH has the potential to effectively treat liver tumours and the technique merits further investigation.
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Kanimba, Eurydice. "Comprehensive Modeling of Novel Thermal Systems: Investigation of Cascaded Thermoelectrics and Bio-Inspired Thermal Protection Systems Performance." Diss., Virginia Tech, 2019. http://hdl.handle.net/10919/103542.

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Thermal systems involve multiple components assembled to store or transfer heat for power, cooling, or insulation purpose, and this research focuses on modeling the performance of two novel thermal systems that are capable of functioning in environments subjected to high heat fluxes. The first investigated thermal system is a cascaded thermoelectric generator (TEG) that directly converts heat into electricity and offers a green option for renewable energy generation. The presented cascaded TEG allows harvesting energy in high temperatures ranging from 473K to 973K, and being a solid-state device with no moving parts constitutes an excellent feature for increase device life cycle and minimum maintenance in harsh, remote environments. Two cascaded TEG designs are analyzed in this research: the two-stage and three-stage cascaded TEGs, and based on the findings, the two-stage cascaded TEG produces a power output of 42 W with an efficiency of 8.3% while the three-cascaded TEG produces 51 W with an efficiency of 10.2%. The second investigated novel thermal system is a thermal protection system inspired by the porous internal skeleton of the cuttlefish also known as cuttlebone. The presented bio- inspired thermal protection has excellent features to serve as an integrated thermal protection system for spacecraft vehicles including being lightweight (93% porosity) and possessing high compressive strength. A large amount of heat flux is generated from friction between air and spacecraft vehicle exterior, especially during reentry into the atmosphere, and part of the herein presented research involves a thermomechanical modeling analysis of the cuttlebone bio-inspired integrated thermal protection system along with comparing its performance with three conventional structures such as the wavy, the pyramid, and cylindrical pin structures. The results suggest that the cuttlebone integrated thermal protection system excels the best at resisting deformation caused by thermal expansion when subjected to aerodynamic heat fluxes.
Doctor of Philosophy
Operating engineering systems in extremely hot environments often decreases systems' reliability, life cycle, and creates premature failure. This research investigates two novel thermal systems capable of functioning in high temperatures including a cascaded thermoelectric generator (TEG) and a bio-inspired thermal protection system. The first evaluated novel thermal systems is a cascaded TEG that directly converts waste heat into power, and being a solid-state device with no moving parts forms an excellent feature for device life cycle improvement and minimum maintenance in harsh, remote environments. The research findings show that the designed cascaded TEGs can produce power when subjected to high temperatures ranging from 473K to 973K. The remaining part of the research presented in this dissertation models the thermomechanical performance of a lightweight structure, which is inspired by the internal skeleton of the cuttlefish, also knows as the cuttlebone. The cuttlefish's natural ability to support high-deep sea pressure translates into possessing high compressive strength, and when added the fact of being lightweight (up to 93% porosity), the cuttlebone forms an excellent candidate to serve as integrated thermal protection for spacecraft vehicles. The last part of the presented research discuss the thermomechanical analysis of the cuttlebone when subjected to high aerodynamics heat flux generated from friction between the air and spacecraft vehicle exterior, and it was found that the cuttlebone structure resists deformation associated with the steep temperature gradient experienced by the spacecraft vehicle during travel.
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Dichamp, Jules. "De l'imagerie tissu entier à la modélisation in silico du réseau vasculaire du tissu adipeux." Phd thesis, Toulouse, INPT, 2018. http://oatao.univ-toulouse.fr/23606/1/Dichamp.pdf.

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Le tissu adipeux est traditionnellement décrit comme étant constitué de lobules : des entités de formes ovoïdales composées de cellules et de vaisseaux et faiblement connectées entre elles.Récemment, il a été montré qu’un potentiel métabolique spécifique (le browning) co-localise avec cette organisation en lobules au sein d’un même tissu. Dans ce travail de thèse, nous nous intéressons à décrire plus précisément l’organisation structurelle et fonctionnelle du tissu adipeux selon plusieurs aspects. Dans un premier temps, on s’attache à segmenter les lobules du tissu adipeux en utilisant une méthode de traitement d’image originale. Nous mettons en évidence une organisation 3D complexe et suivant plusieurs échelles. En particulier, il semble que le potentiel de browning soit également lié à une organisation structurelle particulière en clusters de lobules. Dans un second temps, à partir d’imagerie 3D, nous reconstruisons le réseau vasculaire entier du tissu adipeux et réalisons une simulation d’écoulements sanguins micro-vasculaires. Plusieurs hétérogénéités structurelles et fonctionnelles sont alors mises en valeurs à l’aide d’une analyse en communautés qui composent le tissu adipeux (par algorithme de clustering). Ces résultats confirment l’existence d’une zone centrale fortement vascularisée et qui se démarque également comme étant le lieu d’une perfusion sanguine d’intensité différente. Dans une dernière partie, nous abordons la question de transferts thermiques entre vaisseaux sanguins suivant des géométries simples mais pertinentes. Nous réalisons une étude systématique des paramètres adimensionnels clés du problème et mettons en évidence un invariant des échanges de chaleur : un optimum à faible nombre de Péclet (convection de même ordre que la diffusion). Nous introduisons également une méthode de calibration de paramètres effectifs dans le contexte des modèles homogénéisés de température à travers des tissus vascularisés.
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Rupp, Ariana I. K. S. "Leaf-inspired Design for Heat and Vapor Exchange." University of Akron / OhioLINK, 2020. http://rave.ohiolink.edu/etdc/view?acc_num=akron15929515707363.

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Claude, Sophie. "Étude expérimentale et numérique de solutions basées sur les éco-matériaux pour la rénovation thermique du patrimoine bâti urbain." Thesis, Toulouse, INSA, 2018. http://www.theses.fr/2018ISAT0008/document.

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Concilier patrimoine et amélioration de la performance énergétique du bâti ancien est un défi pour de nombreux centres historiques. La Communauté d’Agglomération du Grand Cahors, qui finance ce travail de thèse à travers une convention CIFRE, a souhaité s’attaquer à cette problématique en valorisant des isolants bio-sourcés. Le choix du matériau et du système d’isolation sont essentiels car ils influencent à la fois la performance hygrothermique de la paroi, la qualité de l’air intérieur, le coût et l’empreinte carbone de la rénovation. Dans cette étude, nous nous sommes focalisé sur la performance hygrothermique de la paroi afin d’assurer que la mise en place d’une isolation par l’intérieur ne soit pas source de dégradations futures de la paroi. Pour cela, nous avons confronté différents outils et méthodes tels que la caractérisation physique des matériaux, une instrumentation in-situ dans deux appartements du centre ancien de Cahors et des simulations hygrothermiques alliant différents outils numériques
Improving the energy efficiency of buildings is essential to reduce greenhouse gas emissions and mitigate against climate change. Historic dwellings represent a large part of the French building stock that needs to be refurbished. In the city center of Cahors, France, the old medieval dwellings are considered as valuable cultural heritage and internal insulation is often the only insulation technique that can be used when the architectural value of the exterior façade is to be preserved. This PhD thesis, funded by a CIFRE agreement with the Communauté d’Agglomération du Grand Cahors, studied the suitability of bio-based materials for the internal insulation of historical dwellings in urban area. The selection of the insulation material and the system is crucial because of its impact on the hygrothermal performance of the wall, the indoor air quality, the financial cost, and the carbon footprint of the refurbishment solution. In this study we focused on the hygrothermal performance of the walls to provide a reliable risk assessment in order to avoid hygrothermal failure. Due to the complexity of the problem and the lack of needed data, we ran a multi-scale study including both experimental (laboratory characterisation and building monitoring) and numerical modelling methods
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Seng, Billy. "Etude expérimentale et numérique du comportement hygrothermique de blocs préfabriqués en béton de chanvre." Thesis, Toulouse 3, 2018. http://www.theses.fr/2018TOU30153.

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Le béton de chanvre est un matériau de construction biosourcé pouvant répondre aux problématiques environnementales actuelles. Utilisé comme matériau de remplissage avec une bonne capacité isolante, il possède également la capacité de réguler l'humidité relative intérieure. Son comportement hygrothermique complexe résulte notamment de performances thermiques et hydriques interdépendantes. La prédiction de ces effets est réalisée à l'aide de modélisation et simulation de transferts hygrothermiques. Toutefois, l'utilisation de données d'entrée les plus représentatives possibles de la réalité est nécessaire. Les méthodes de caractérisation courantes ont souvent été développées pour des matériaux conventionnels et peuvent montrer des limites dans le cas de matériaux biosourcés. L'objectif principal de ces travaux est de déterminer les propriétés hygrothermiques d'un bloc de béton de chanvre préfabriqués à l'échelle industrielle, de mieux appréhender cette caractérisation et de décrire son comportement hygrothermique via des simulations numériques. Le matériau étudié est formulé à partir d'un liant pouzzolanique et de granulats de chènevotte. Une partie de ce travail de thèse a donc porté sur la caractérisation des propriétés physiques, thermiques et hydriques du béton de chanvre étudié ainsi que sur les méthodes de mesure. Pour chaque paramètre hygrothermique étudié, plusieurs méthodes ont été confrontées afin d'en évaluer l'impact. Dans la mesure du possible, l'influence de la température et de l'humidité sur les différents paramètres a également été estimée. Un modèle de transferts hygrothermiques est proposé avec une évaluation d'ordre de grandeur dans le cas du béton de chanvre à partir des propriétés de la littérature. Ce modèle est appliqué à une étude expérimentale à l'échelle de la paroi, dans une enceinte bi-climatique, mettant en avant l'impact de la sorption et du changement de phase sur les transferts de chaleur. En ce qui concerne les propriétés thermiques, l'étude expérimentale à l'échelle du matériau met en évidence l'impact significatif du protocole expérimental sur le résultat de mesure, en particulier pour la chaleur massique. Pour les propriétés hydriques, les essais mettent en avant l'intérêt de réaliser une étude paramétrique de type round-robin sur les matériaux biosourcés. [...]
Hemp concrete is a bio-based construction material able to meet current sustainable issues. Used as filling and insulating material, it has the capacity to regulate the indoor relative humidity. Its complex hygrothermal behavior results on interdependent thermal and hydric performances. The prediction of the hygrothermal effect is performed through heat and moisture transfer modeling and simulation. However, the use of representative inputs is necessary. Standard characterization methods have often been developed for usual building material and can show some limitations in the case of bio-based material. The main objective of these works is to determine the hygrothermal properties of a precast hemp concrete produced at industrial scale, have a better understanding of this characterization and describe its hygrothermal behavior through numerical simulations. The studied material is based on pozzolanic binder and hemp aggregates. One part of this work deals with the characterization of the physical, thermal and hydric properties of the studied material and with the measurement methods. For each hygrothermal properties, several methods have been confronted. If possible, the temperature and humidity influences have been appraised. A heat and moisture transfer model is proposed with a scale analysis based on hemp concrete properties from the literature. This model has been applied to wall scale experiments highlighting the impact of sorption and phase change phenomena on the heat transfers. With regards to the thermal properties, the experimental study at material scale highlights the significant impact of the experimental protocol on the result of the measure, particularly for the specific heat capacity. For hydric properties, the studies put forward the interest of performing a parametric round-robin test dedicated to bio-based materials. An air permeability measurement protocol designed for regular concrete has been adapted in order to evaluate the performance of a very permeable material such as the hemp concrete. The numerical model is validated on a test from a standard and a test from the literature. It manages to describe test with usual ambient solicitations performed in the bi-climatic chamber
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Oliveira, Filho Ulisses Corr?a de. "Desenvolvimento de um secador spray para obten??o de p?s finos de precursores de ni?bio." Universidade Federal do Rio Grande do Norte, 2007. http://repositorio.ufrn.br:8080/jspui/handle/123456789/15874.

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Made available in DSpace on 2014-12-17T15:01:44Z (GMT). No. of bitstreams: 1 UlissesCOF.pdf: 4000133 bytes, checksum: 2f1689ba64508ae157f48710d758ba50 (MD5) Previous issue date: 2007-11-01
This work presents a spray-dryer designed to oxalate-niobate precursors and suitable for the production of Niobium Carbide. The dryer was intended to produce powders of controlled particle size. First, the precursor is dissolved in water to produce a solution of known concentration and then it is atomized on the spray-dryer to produce the powder. This equipment consists of a 304 stainless steel chamber, 0.48 m x 1.9 m (diameter x length), with a conical shape at the lower portion, which is assembled on a vertical platform. The chamber is heated by three 4 kW electrical resistances. In this process, drying air is heated as it flows inside a serpentine surrounding the chamber, in contrary to more traditional processes in which the hot drying air is used to heat the component. The air enters the chamber at the same temperature of the chamber, thus avoiding adherence of particles on the internal surface. The low speed flow is concurrent, directed from the top to the bottom portion of the chamber. Powders are deposited on a 0.4 m diameter tray, which separates the cylindrical portion from the conical portion of the chamber. The humid air is discharged though a plug placed underneath the collecting tray. A factorial experimental planning was prepared to study the influence of five parameters (concentration, input flow, operation temperature, drying air flow and spray air flow) on the characteristics of the powders produced. Particle size distribution and shape were measured by laser granulometry and scanning electronic microscopy. Then, the powders are submitted to reaction in a CH4 / H2 atmosphere to compare the characteristics of spray-dried powders with powders synthetizided by conventional methods
O presente trabalho consiste em projetar e construir um secador spray com a finalidade de secar precursores do tipo oxalato-niobato de am?nia para obten??o de p?s com granulometria controlada e adequados ? produ??o de carbetos de Ni?bio policristalino. Este precursor ? atualmente obtido com granulometria dispersa, e morfologia n?o uniforme. A secagem em spray pode uniformizar as propriedades de materiais que s?o dissolvidos em ?gua, gerando uma solu??o de concentra??o conhecida que ? ent?o, atomizada no secador spray visando ? obten??o do material na forma de p?. O secador ? constitu?do por uma c?mara de secagem em a?o inox 304 medindo 0,48 m de di?metro por 1,90 m de comprimento, montado em uma plataforma vertical e com formato tronco c?nico na sua parte inferior. A c?mara ? aquecida por tr?s cintas de resist?ncias eletricas com pot?ncia total de 4 kW e o ar ? aquecido ao passar por serpentinas constru?das ao redor da c?mara de secagem. O sistema foi projetado de maneira n?o convencional tendo como objetivo principal a produ??o de p?s de precursores com granulometria fina e com uma boa distribui??o do tamanho das part?culas. Foi realizado um planejamento fatorial experimental visando ? an?lise da influ?ncia de cinco par?metros (concentra??o, vaz?o da alimenta??o, temperatura de opera??o, vaz?o do ar de secagem e vaz?o do ar do atomizador) sobre as caracter?sticas dos p?s obtidos usando-se solu??es de bicarbonato de s?dio. As Caracter?sticas f?sicas foram avaliadas a partir de an?lise de ?rea superficial, DRX, tamanho e forma das part?culas, granulometria a laser e microscopia eletr?nica de varredura. Em seguida foi realizada a secagem do precursor e, os p?s obtidos foram submetidos a rea??es com CH4 / H2 com o objetivo de comparar as caracter?sticas dos p?s oriundos do secador spray e aqueles que n?o tiveram esse tratamento. Os resultados mostraram que o equipamento produziu part?culas de bicarbonato de s?dio com di?metros m?dios de 2,4 a 52,4 μm, conforme as temperatura e vaz?es de alimenta??o, e se mostrou capaz de secar precursores do tipo oxalato-niobato de am?nia sem perda de suas caracter?sticas
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Chennouf, Nawal. "Phénomènes de transfert de chaleur et de masse dans les composites de bois de palmier dattier : comportement sous sollicitations dynamiques." Thesis, Paris Est, 2019. http://www.theses.fr/2019PESC0012.

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Promouvoir le béton à base de bois de palmier dattier (DPC) dans la construction neuve et dans la rénovation des bâtiments existants nécessite en premier lieu une caractérisation complète de son comportement hygrothermique à multi échelle (matériau, paroi et bâtiment). Dans ce travail de thèse, le comportement hygrothermique du béton de bois palmier dattier a été étudié expérimentalement à l'échelle matériau, puis à l'échelle mur. Dans une première partie, les isothermes d’adsorption-désorption ainsi que l’effet d’hystérésis du DPC ont été caractérisés dans des conditions statiques. Les résultats recueillis ont révélé une capacité hydrique élevée de ce matériau par rapport à d’autres matériaux de construction. Par ailleurs, la valeur du tampon hydrique et l'effet de la température sur les cycles successifs d'adsorption / désorption ont également été évalués dans des conditions dynamiques. Il a été constaté que le processus de sorption est fortement affecté par la variation de la température. Les résultats obtenus ont permis de classer le DPC comme un matériau hygroscopique possédant une excellente capacité de régulation d’humidité. Dans la deuxième partie de la thèse, le comportement hygrothermique d’un mur en DPC a été étudié expérimentalement à l’aide d’une chambre climatique. Plusieurs scénarios de variations de température et d'humidité relative ont été appliqués sur une seule face du mur. Les variations de la température et d'humidité à différentes profondeurs de la paroi ont été mesurées à l'aide de capteurs. Plusieurs phénomènes thermo-hydriques ont été mis en évidence tels que l'effet du couplage de transfert de chaleur et d'humidité relatif aux phénomènes d'évaporation-condensation et d’adsorption-désorption. En outre, une inertie thermique et hydrique importante a été observée à travers le mur de DPC, ce qui permet de limiter la surchauffe et de réduire la condensation interstitielle pour des constructions durables
Promoting the date palm concrete in new constructions and renovating buildings requires a full hygrothermal characterization at several scales (material, wall and building). In this thesis, the hygrothermal behavior of date palm concrete was experimentally investigated, firstly at material scale then at wall scale. In the first part, the adsorption-desorption isotherms and the hysteresis effect of DPC were characterized under static conditions.The results revealed a high hygric capacity for this material compared with other classical building materials. The moisture buffer value and the effect of temperature on successive adsorption/desorption cycles were also assessed under dynamic conditions. It was found that the sorption process is highly affected by the temperature. Furthermore, this bio-based mortar was classified as hygroscopic and breathable material with excellent moisture buffer capacity. In the second part of the thesis, we have experimentally investigated the hygrothermal behavior at wall scale. The investigation was performed using a climatic chamber where the variation of temperature and relative humidity were applied on one side of the wall. These both parameters were measured at different depths of the biobased wall using sensors. Several thermo-hygric phenomena were highlighted such as the high coupling effect between the heat and moisture transfer due to the evaporation-condensation and adsorption-desorption phenomena. Besides, significant thermal and hygric inertia was observed through the DPC wall which allows mitigating overheating and reducing interstitial condensation for sustainable constructions
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Aghahadi, Mohammad. "Etude expérimentale et modélisation physique des transferts couplés chaleur-humidité dans un isolant bio-sourcé." Thesis, Bourgogne Franche-Comté, 2019. http://www.theses.fr/2019UBFCA007/document.

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Le caractère fortement hydrophile des isolants thermiques bio-sourcés, a montré que les modèles classiques de transfert thermique ne sont pas suffisamment adaptés pour leur caractérisation thermique. Ce travail de thèse vise à répondre à cette problématique par des approches expérimentale et théorique des transferts couplés chaleur-humidité. Dans l’approche expérimentale, un isolant thermique en feutre de fibres de lin (FFL) a été développé puis caractérisé, dans différents états hygrométriques, au moyen d’un dispositif Plan Chaud asymétrique. Des isothermes d’adsorption de l’humidité corrélés aux modèles théoriques GAB, GDW et Park permettent une caractérisation hydrique de cet isolant. Dans l’approche théorique, un modèle physique, de transfert couplé chaleur-humidité au sein de l’isolant FFL humide, est proposé. Il est résolu numériquement, en configuration 3D transitoire, par la méthode de éléments finis sous COMSOL Multiphysics et par la méthode des différences finies, en configuration 1D transitoire, sous MATLAB. La méthode de Levenberg-Marquardt couplée avec le modèle direct 1D transitoire et les températures mesurées a permis d’estimer la conductivité thermique apparente de l'échantillon étudié avec une erreur relative inférieure à 6% par rapport aux mesures expérimentales, validant ainsi les modèles théoriques
The conventional heat transfer models are not sufficiently suitable for thermal characterization of bio-sourced thermal insulating materials due to their strongly hydrophilic nature. The proposed work in this PhD thesis aims to answer this problem with experimental and theoretical approaches of coupled heat-moisture transfers. In the experimental approach, a thermal insulating material based on Flax Fiber Felt (FFF) is developed and then characterized at different hygrometric conditions with an asymmetric hot plate device. The humidity diffusion characterization of the samples is done using the GAB, GDW and Park theoretical moisture adsorption isotherm models. In the theoretical approach, a physical model of heat and mass transfer is proposed. It is solved numerically, in transient 3D configuration, by the finite element method under COMSOL Multiphysics and, in transient 1D configuration, by the finite difference method under MATLAB. The Levenberg-Marquardt method coupled with the 1D transient direct model and the measured temperatures made it possible to estimate the apparent thermal conductivity of the studied sample with a relative error of less than 6% compared to the experimental measurements, thus validating the theoretical models
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Jaberzadeh, Amir. "Simulation de transfert de chaleur et l'optimisation automatique des probes trajectoires multiple de la planification pré-opératoire pour les interventions percutanées thermique." Thesis, Strasbourg, 2015. http://www.theses.fr/2015STRAD003.

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Différentes techniques de chirurgie mini-invasive permettent aujourd’hui d’effectuer les procédures d'ablation de tumeurs. La cryochirurgie est une de ces techniques et fonctionne grâce à une technique de décompression très rapide de l'argon à l’extrémité d’une sonde en forme d'aiguille. La planification pré-opératoire de ce type d’intervention est très difficile pour le chirurgien, qui doit se représenter mentalement la disposition finale des aiguilles par rapport à la position des structures anatomiques complexe. Une sur-ablation ou une sous-ablation peuvent entraîner des complications donc, devant le besoin crucial d'une telle planification, dans cette thèse nous nous sommes concentrés sur la planification pré-opératoire automatisée de la cryochirurgie,avec les objectifs de assister le chirurgien grâce à une prédiction plus réaliste des zones d'ablation et proposer automatiquement un placement d'aiguille avec un risque minimal pour le patient dans un délai acceptable pour une utilisation en salle d'opération
There exist several minimally invasive techniques to perform tumor ablation procedures.Cryosurgery is one of these techniques and works by decompressing very rapidly the argon gas through a needle-like probe. It is hard for the surgeons to imagine final results and plan the surgery in advance in a complicated anatomical environment. Over-ablation or under ablation may result in complications during the treatment. So, due to a crucial need for having such a planning tool, in this thesis we focused on an automated pre-surgical planning for cryosurgery with goals to support the physician by utilizing a more realistic prediction of ablation zones and proposing a needle placement setup with a close to minimum risk to the patient and an optimal coverage of the tumor by the iceball in an acceptable time for the use in the operation room
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Books on the topic "Bio-heat transfer"

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American Society of Mechanical Engineers. Winter Meeting. Advances in measuring and computing temperatures in biomedicine: Thermal tomography techniques, bio-heat transfer models : presented at the Winter Annual Meeting of the American Society of Mechanical Engineers, Dallas, Texas, November 25-30, 1990. New York, N.Y: American Society of Mechanical Engineers, 1990.

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Ghassemi, Majid, and Azadeh Shahidian. Nano and Bio Heat Transfer and Fluid Flow. Elsevier Science & Technology Books, 2017.

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B, Roemer R., American Society of Mechanical Engineers. Winter Meeting., and American Society of Mechanical Engineers. Heat Transfer Division., eds. Advances in measuring and computing temperatures in biomedicine, thermal tomography techniques, bio-heat transfer models: Presented at the Winter Annual Meeting of the American Society of Mechanical Engineers, Dallas, Texas, November 25-30, 1990. New York, N.Y: American Society of Mechanical Engineers, 1990.

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Book chapters on the topic "Bio-heat transfer"

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Majchrzak, E., and B. Mochnacki. "Analysis of Bio-Heat Transfer in the System Blood Vessel — Biological Tissue." In IUTAM/IACM/IABEM Symposium on Advanced Mathematical and Computational Mechanics Aspects of the Boundary Element Method, 201–11. Dordrecht: Springer Netherlands, 2001. http://dx.doi.org/10.1007/978-94-015-9793-7_17.

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Gkigkitzis, Ioannis, Carlos Austerlitz, Ioannis Haranas, and Diana Campos. "The Effect of the Shape and Size of Gold Seeds Irradiated with Ultrasound on the Bio-Heat Transfer in Tissue." In Advances in Experimental Medicine and Biology, 103–24. Cham: Springer International Publishing, 2014. http://dx.doi.org/10.1007/978-3-319-09012-2_8.

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Joshi, Y., X. Wei, B. Dang, and K. Kota. "Some Aspects of Microchannel Heat Transfer." In Nano-Bio- Electronic, Photonic and MEMS Packaging, 431–77. Boston, MA: Springer US, 2009. http://dx.doi.org/10.1007/978-1-4419-0040-1_13.

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Joshi, Y., X. Wei, B. Dang, and K. Kota. "Some Aspects of Microchannel Heat Transfer." In Nano-Bio- Electronic, Photonic and MEMS Packaging, 205–33. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-49991-4_10.

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Alioua, T., B. Agoudjil, and A. Boudenne. "Numerical Study of Heat and Moisture Transfers for Validation on Bio-Based Building Materials and Walls." In Proceedings of the 1st International Conference on Numerical Modelling in Engineering, 81–89. Singapore: Springer Singapore, 2018. http://dx.doi.org/10.1007/978-981-13-2405-5_7.

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Ghassemi, Majid, and Azadeh Shahidian. "Biosystems Heat and Mass Transfer." In Nano and Bio Heat Transfer and Fluid Flow, 31–56. Elsevier, 2017. http://dx.doi.org/10.1016/b978-0-12-803779-9.00003-0.

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Ghassemi, Majid, and Azadeh Shahidian. "Bio-Nanofluid Simulation." In Nano and Bio Heat Transfer and Fluid Flow, 89–112. Elsevier, 2017. http://dx.doi.org/10.1016/b978-0-12-803779-9.00005-4.

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Ghassemi, Majid, and Azadeh Shahidian. "History of Bio-Nano Fluid Flow." In Nano and Bio Heat Transfer and Fluid Flow, 1–8. Elsevier, 2017. http://dx.doi.org/10.1016/b978-0-12-803779-9.00001-7.

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Ghassemi, Majid, and Azadeh Shahidian. "Thermodynamics." In Nano and Bio Heat Transfer and Fluid Flow, 9–30. Elsevier, 2017. http://dx.doi.org/10.1016/b978-0-12-803779-9.00002-9.

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Ghassemi, Majid, and Azadeh Shahidian. "Fluid Mechanics." In Nano and Bio Heat Transfer and Fluid Flow, 57–87. Elsevier, 2017. http://dx.doi.org/10.1016/b978-0-12-803779-9.00004-2.

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Conference papers on the topic "Bio-heat transfer"

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Yazawa, Kazuaki, and Ali Shakouri. "Heat transfer modeling for bio-heat recovery." In 2016 15th IEEE Intersociety Conference on Thermal and Thermomechanical Phenomena in Electronic Systems (ITherm). IEEE, 2016. http://dx.doi.org/10.1109/itherm.2016.7517723.

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Hua, Tse-Chao, and Bao-lin Liu. "HEAT AND MASS TRANSFER IN VITRIFICATION OF BIO-AND-FOOD MATERIALS." In International Heat Transfer Conference 11. Connecticut: Begellhouse, 1998. http://dx.doi.org/10.1615/ihtc11.2810.

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Narasimhan, Arunn, and Kaushal Kumar Jha. "Bio-Heat Transfer Model of Human Eye Subjected to Retinal Laser Irradiation." In 2010 14th International Heat Transfer Conference. ASMEDC, 2010. http://dx.doi.org/10.1115/ihtc14-22799.

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Retinopathy is a surgical process in which maladies of the human eye are treated by laser irradiation. A two-dimensional numerical model of the human eye geometry has been developed to investigate steady and transient thermal effects due to laser radiation. In particular, the influence of choroidal pigmentations and choroidal blood convection — parameterized as a function of choroidal blood perfusion are investigated in detail. The Pennes bio-heat transfer equation is invoked as the governing equation and a finite volume formulation is employed in the numerical method. The numerical model is validated with available experimental and two-dimensional numerical results. For a 500 μm diameter spot size, laser power of 0.2 W, with 100% absorption of laser radiation in the Retinal Pigmented Epithelium (RPE) region, the peak RPE temperature is observed to be 175 °C at steady state, with no blood perfusion in choroid. It reduces to 168.5 °C when the choroidal blood perfusion rate is increased to 23.3 kgm−3s−1. However, under transient simulations, the peak RPE temperature is observed to remain constant at 104 °C after 100 ms of the laser surgery period. A truncated three-dimensional model incorporating multiple laser irradiation spots is also developed to observe the spatial effect of choroidal blood perfusion. For a circular array of seven uniformly distributed spots of identical diameter and laser power of 0.2 W, steady and transient temperature evolution are presented with analysis.
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Aouf, Rashad, Vojislav Ilic, and Steve Hansen. "REVIEW OF COMPUTATIONAL BIO-HEAT TRANSFER MODELING FOR TUMOUR TREATMENT." In Proceedings of CHT-08 ICHMT International Symposium on Advances in Computational Heat Transfer. Connecticut: Begellhouse, 2008. http://dx.doi.org/10.1615/ichmt.2008.cht.640.

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Prasad, Anish, Yogesh Pai, Osarodion Ogbebor-Evans, and Mark A. Ricklick. "Investigation of Bio-Inspired Pin Geometries for Enhanced Heat Transfer Applications." In 2018 Joint Propulsion Conference. Reston, Virginia: American Institute of Aeronautics and Astronautics, 2018. http://dx.doi.org/10.2514/6.2018-4429.

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Balusu, Kranthi, S. S. Suganthi, and S. Ramakrishnan. "Modelling Bio-heat transfer in Breast Cysts using Finite Element analysis." In 2014 International Conference on Informatics, Electronics & Vision (ICIEV). IEEE, 2014. http://dx.doi.org/10.1109/iciev.2014.6850842.

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Elwassif, Maged M., Qingjun Kong, Maribel Vazquez, and Marom Bikson. "Bio-Heat Transfer Model of Deep Brain Stimulation Induced Temperature changes." In Conference Proceedings. Annual International Conference of the IEEE Engineering in Medicine and Biology Society. IEEE, 2006. http://dx.doi.org/10.1109/iembs.2006.4398221.

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Elwassif, Maged M., Qingjun Kong, Maribel Vazquez, and Marom Bikson. "Bio-Heat Transfer Model of Deep Brain Stimulation Induced Temperature changes." In Conference Proceedings. Annual International Conference of the IEEE Engineering in Medicine and Biology Society. IEEE, 2006. http://dx.doi.org/10.1109/iembs.2006.259425.

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Hassanipour, Fatemeh, and Jose´ Lage. "Bio Inspired Particle Enhanced Capillary Heat Exchanger." In ASME 2008 6th International Conference on Nanochannels, Microchannels, and Minichannels. ASMEDC, 2008. http://dx.doi.org/10.1115/icnmm2008-62103.

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This study proposes a new cooling concept using encapsulated phase-change material particles in mini-channels. This novel method is inspired by the gas exchange process in the lung capillaries. An important characteristic of capillary blood flow is that the red blood cells fit very snugly into the capillary opening. Hence, it is conjectured that using particles with diameter similar to the channel diameter, in a manner similar to red blood cells in lung capillaries, is likely to enhance the heat transfer coefficient, even under laminar flow. Preliminary tests are performed with encapsulated Octadecan paraffin (C18H38) in a low-conductivity thin melamine shell, flowing through a test module. The effect of flow rate on the heat transfer coefficient and also the effect of using particles on enhancement of Nusselt number has been measured. Temperature distribution on the chip has also been investigated under various particle concentrations, heat fluxes and Reynolds numbers.
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Prasad, Anish, Yogesh Pai, Osarodion Ogbebor-Evans, and Mark A. Ricklick. "Correction: Investigation of Bio-Inspired Pin Geometries for Enhanced Heat Transfer Applications." In 2018 Joint Propulsion Conference. Reston, Virginia: American Institute of Aeronautics and Astronautics, 2018. http://dx.doi.org/10.2514/6.2018-4429.c1.

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Reports on the topic "Bio-heat transfer"

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Schaefer, Raymond B. Pulsed Acoustic Sparker Bio-Fouling Control in Heat Transfer Equipment. Fort Belvoir, VA: Defense Technical Information Center, October 2002. http://dx.doi.org/10.21236/ada608466.

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