A Review on Mathematical Models of the Human Thermal System PDF Download
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Author: Liang-tseng Fan
Publisher:
ISBN:
Category : Body temperature
Languages : en
Pages : 72
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Book Description
The literature on mathematical models of the human thermal system is reviewed and classified. The models are tabulated in chronological order for convenience of the readers. (Author).
Author: Liang-tseng Fan
Publisher:
ISBN:
Category : Body temperature
Languages : en
Pages : 72
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Book Description
The literature on mathematical models of the human thermal system is reviewed and classified. The models are tabulated in chronological order for convenience of the readers. (Author).
Author: Michael David Nelson
Publisher:
ISBN:
Category : Body temperature
Languages : en
Pages : 108
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Book Description
Author: EUGENE H. WISSLER
Publisher:
ISBN:
Category :
Languages : en
Pages : 1
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Book Description
THE LATEST IN A SERIES OF MATHEMATICAL MODELS FOR THE HUMAN THERMAL SYSTEM ARE DESCRIBED. In preparing this model, finite-difference techniques to solve the heat conduction equation were used. Since numerial techniques were used, it was possible to include many more factors in this model than in the previous ones. The body was divided into fifteen geometric regions, which were the head, the thorax, the abdomen, and the proximal, medial, and distal segments of the arms and legs. Axial gradients in a given segment were neglected. In each segment, the large arteries and veins were approximated by an arterial pool and a venous pool which were distributed radially throughout the segment. Accumulation of heat in the blood of the large arteries and veins and heat transfer from the large arteries and veins to the surrounding tissue were taken into account. The venous streams were collected together at the heart before flowing into the capillaries of the lungs. Each of the segments was subdivided into fifteen radial sections, thereby allowing considerable freedom in the assignment of physical properties such as thermal conductivity and rate of blood flow to the capillaries. (Author).
Author: Eda Didem Yıldırım
Publisher:
ISBN:
Category : Body temperature
Languages : en
Pages : 374
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Book Description
Mathematical model of the human thermal system, which has been greatly developed in recent years, has applications in many areas. It is used to evaluate the environmental conditions in buildings, in car industry, in textile industries, in the aerospace industry, in meteorology, in medicine, and in military applications. In these disciplines, the model can serve for research into human performance, thermal acceptability and temperature sensation, safety limits. Present study investigates the mathematical modeling of the passive part of the human thermal system. The Bio-Heat Equation is derived in order to solve the heat transfer phenomena in the tissue and with environment. It is assumed that the body is exposed to combination of the convection, evaporation and radiation which are taken into account as boundary conditions when solving the Bio-Heat Equation. Finite difference technique is used in order to find out the temperature distribution of human body. The derived equation by numerical method is solved by written software called Bio-Thermal. Bio-Thermal, is used to determine temperature distribution at succeeding time step of the viscera, lung, brain all tissue type of the torso, neck, head, leg, foot, arm, hand, and mean temperature of torso, neck, head, leg, foot, arm, hand. Additionally, for overall body, mean temperature of the bone tissue, muscle tissue, fat tissue, and skin tissue and mean temperature of the total body can be obtained by Bio-Thermal Software. Also, the software is to be capable of demonstrating the sectional view of the various body limbs and full human body. In order to verify the present study, predictions of the present system model are compared with the available experimental data and analytical solution and show good agreement is achieved.
Author: EUGENE H. WISSLER
Publisher:
ISBN:
Category :
Languages : en
Pages : 1
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Book Description
The synthesis of an adequate mathematical model for the human thermal system must include the following factors: (1) the manner in which heat generated by metabolic reactions is distributed throughout the body, (2) conduction of heat ue to thermal gradients, (3) convection of heat by circulating blood, (4) the geometry of the body, (5) the relatively low thermal conductivity of the superficial layer of fat and skin, (6) countercurrent heat exchange between large arteries and veins, (7) heat loss through the respiratory tract, (8) sweating, (9) shivering, (10) the storage of heat, and (11) the condition of the environment, including its temperature, motion relative to the body, and relative humidity. This report describes the progress which was made on the synthesis of such a model. (Author).
Author: DUTTA, BINAY K.
Publisher: PHI Learning Pvt. Ltd.
ISBN: 8196378904
Category : Science
Languages : en
Pages : 649
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Book Description
This textbook is intended for courses in heat transfer for undergraduates, not only in chemical engineering and related disciplines of biochemical engineering, and chemical technology, but also in mechanical engineering and production engineering. The author provides the reader with a thorough account of the fundamental principles and their applications to engineering practice, including a survey of the recent developments in heat transfer equipment. A whole chapter has been devoted to explain the concept of the heat transfer coefficient to give a feel of its importance in tackling problems of convective heat transfer. The use of the important heat transfer correlations has been illustrated with carefully selected examples. In addition to an overview of the construction, operation and selection of equipment for heating, cooling, and phase change (boiling, condensation and evaporation), the revised second edition provides glimpses of the present trends and practice relating to heat transfer equipment in process industries and illustrative photographs of the state-of-the-art equipment. The design procedures of more common heat exchangers such as shell-and-tube, air-cooled, plate-and-frame, spiral plate, and spiral tube have been illustrated with realistic examples. Several new examples and problems have been included. Comparison with ASPEN simulation results has been given for a shell-and-tube exchanger. Cost calculation of a heat exchanger from the first principles is included. Recent topics such as heat transfer in microchannels and nano-fluids, and bio-heat transfer have been introduced. WHAT IS NEW TO THIS EDITION? • Thoroughly recast chapters providing glimpses of the recent developments in theory and application areas of the subject. • A new chapter (Chapter 12) on Microchannel, Nano-and Bio-heat Transfer added to introduce the readers to the newer areas of research and application. • Chapter 8 on Heat Exchangers has been thoroughly revised in consideration of the practical and direct use of the theoretical principles. • Topics such as the Bell Method of heat exchanger design, sizing of air-cooled heat exchangers, plate heat exchanger, spiral plate and spiral tube heat exchangers are some of the fresh additions • Results of a few ASPEN simulations are given in Appendix B. Cost estimation of a S&T heat exchanger from first principles is described in Appendix C. Target Audience • B.Tech. (chemical engineering and related disciplines of biochemical engineering and chemical technology). • Also for courses on heat transfer in mechanical and production engineering.
Author: L.G. Meyer
Publisher:
ISBN:
Category :
Languages : en
Pages : 52
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Book Description
Author: R.C. Eberhart
Publisher: Springer Science & Business Media
ISBN: 1468482858
Category : Science
Languages : en
Pages : 453
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Book Description
Author: Frank T. Hsu
Publisher:
ISBN:
Category : Body temperature
Languages : en
Pages : 43
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Book Description
A mathematical model of the human thermal system under steady state conditions is formulated by using six cylindrical elements representing longitudinal segments of the head, torso, arms, and legs to approximate the human body. The model allows the use of different physiological parameters such as local rate of metabolic heat generation and local blood flow rate in various locations of an element. The regional variations of the physiological parameters are also taken into consideration. A set of ordinary differential equations representing the thermal behavior of all elements are approximated by a set of algebraic equations which resulted from the application of the explicit forward finite difference method. Specifically twenty-eight linear algebraic simultaneous equations are obtained by using five grid points in the spacial coordinate of each element. The model is then simulated for a number of steady state environmental conditions. (Author).
Author: National Library of Medicine (U.S.)
Publisher:
ISBN:
Category : Medicine
Languages : en
Pages :
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Book Description
First multi-year cumulation covers six years: 1965-70.
