上海交通大学：《生物传热学教与学 Bioheat Transfer》课程教学资源（电子讲义）lecture 1 Introduction（张爱丽）

Bioheat Transfer 生物传热学 Lecture 张爱丽zhangailic@sjtu.ed山.cn TA: 忻颖 novelxiaoxin@yahoo.com.cn

Bioheat Transfer 生物传热学 Lecture ：张爱丽 zhangaili@sjtu.edu.cn TA: 忻颖 novelxiaoxin@yahoo.com.cn

Course Description Homework assignment and personal presence: 20% Final examination:80%

Course Description  Homework assignment and personal presence: 20%  Final examination: 80%

Textbook: Thermal Dosimetry and Treatment Planning,JC Chato, KD Paulsen,RB Roemer,M.Gautherie (Ed.),Springer-Verlag Berlin Heidelberg New York, London,Paris,Tokyo,Hongkong,1990. ■Referred books: Heat transfer in Medicine and Biology,A.Shitzer, Robert C.Eberhart,Plenum Press,New York and London,1985 Heat Transfer Essentials,Latif M.Jiji,Begell House Inc.,Publishers,New York,1998

 Textbook:  Thermal Dosimetry and Treatment Planning, JC Chato, KD Paulsen, RB Roemer, M. Gautherie (Ed.), Springer-Verlag Berlin Heidelberg New York, London, Paris, Tokyo, Hongkong, 1990.  Referred books：  Heat transfer in Medicine and Biology, A. Shitzer, Robert C. Eberhart, Plenum Press, New York and London, 1985  Heat Transfer Essentials, Latif M. Jiji, Begell House Inc., Publishers, New York, 1998

Introduction

Introduction

Heat Transfer Energy transfers in the form of heat(J)thru a media where temperature difference exists Temperature the measurement of heat and cold the molecular activity Unit: oC,K,F 0C=273.15K, T(K)=t(°C)+273.15 0C=32FT(°月=32+1.8t(oC)

Heat Transfer  Temperature the measurement of heat and cold : the molecular activity Unit： Energy transfers in the form of heat (J) thru a media where temperature difference exists o C ，K, F 0 oC=273.15K, T(K)=t( oC)+273.15 0 oC=32 oF, T( o F)=32+1.8t( oC)

9.=-K40 Three Modes of Heat Transfer Conduction(Diffusion) a.Media:stationary solid,gas or liquid at diff b.Mechanism:molecular activities,free electrons or atomic vibrations c.Rate equ. d.=-kA E -Fourier's Law dx

Three Modes of Heat Transfer Conduction (Diffusion) a. Media: stationary solid, gas or liquid at diff. b. Mechanism: molecular activities, free electrons or atomic vibrations c. Rate equ. dx dT qx = −KA dx dT qx = −KA ——Fourier’s Law dx dT q x = − kA

qx--Heat transfer rate [w] k--Thermal conductivity of the material [w/m-K] A--Cross-sectional areaqx [m2] "means heat flowing from higher temperature to lower temperature dT =q”=-k [W/m2] A dx Heat flux =heat transfer rate/unit area

qx-- Heat transfer rate [w] k -- Thermal conductivity of the material [w/m·K] A -- Cross-sectional area ┴ qx [m2] “-” means heat flowing from higher temperature to lower temperature dx dT q Aq '' x x = = −k [W/m2] Heat flux =heat transfer rate/ unit area

9.=-K4 4 Convection a Media:between solid moving fluid b.Mechanism:Bulk motion effects c.Rate equ. g=hA(T-T) Newton's law of cooling

Convection a Media: between solid & moving fluid b. Mechanism: Bulk motion effects c. Rate equ. dx dT qx = −KA Newton’s law of cooling hA(T T ) = s − ∞ q

h--Heat transfer coefficient [w/m-k] Ts--Surface temperature T--Fluid temperature =q=h(T,-T) A

h -- Heat transfer coefficient [w/m·k] Ts -- Surface temperature T ∞ -- Fluid temperature h(T T ) A s '' = = − ∞ q q

Radiation a.Media:none b.Mechanism:electromagnetic waves (EM) Any surface at a finite temp.higher than zero K emits heat in the form of EM waves. The intensity of the wave is related to temp. c.Rate equation: g=80T A

Radiation a. Media: none b. Mechanism: electromagnetic waves (EM) Any surface at a finite temp. higher than zero K emits heat in the form of EM waves. The intensity of the wave is related to temp. c. Rate equation: As q 4s = εσT