PPT-Chapter 3: Unsteady State [ Transient ] Heat Conduction

31 Introduction 32 Biot and Fourier Number 33 Lumped heat capacity analysis 34 Time constant and response of a thermocouple 35 Transient. 1 Objectives of conduction analysis 22 General Conduction Equation dE dt QW system in out dE dt QW system in in dE dt QQ system in gen E U mu mc T T V c T T pr f pr brPage 2br cV dT dt QQ system in gen c xyz dT dt qq qq qq Q system xxxyyyzzz g en 1 Introduction 52 Biot and Fourier numbers brPage 2br 57360 flow heat external to resistance flow heat internal to resistance Bi Fourier number Fo time ess dimensionl brPage 3br 53 Lumped thermal capacity analysis brPage 4br Note and their Co-variability with . the Gulf Stream and Kuroshio-Oyashio Extensions. Young-Oh Kwon and Terrence M. Joyce. (Woods Hole Oceanographic Institution). Climate Implications of Frontal Scale Air-Sea Interaction. of Change II. 7. Heat Equations of Change. . 7.1. Derivation of Basic Equations. . 7.1.1. Differential Equation for Heat Conduction. . 7.1.2. Energy Equation. . 7.1.3. . This case of heat transfer happens in different situations.. It is complicated process occupies an important side in applied mathematics to find a solution for Fourier’s low as a partial differential . The process which heat or electricity is . directly. transferred through a substance when there is a difference in temperature or electrical potential. . Conduction = TOUCHING . Conduction. Convection. Conduction problems may involve multiple directions and time-dependent conditions. Inherently complex – Difficult to determine temperature distributions. One-dimensional. . steady-state. models can represent accurately numerous engineering systems. of Change I. So far…. Outline. Heat Transfer Mechanisms. Conduction Heat Transfer. Convection Heat Transfer. Combined Heat Transfer. Overall Shell Heat Balances. Heat Equations of Change. 6. Heat Equations of Change. Fins and Extended Surfaces. 1. Chapter 3c : One-dimensional, Steady state conduction (with thermal energy generation) (Section 3.5 – Textbook). 2. 3.1 Implications of energy generation. Involve a local source of thermal energy due to conversion from another form of energy in a conducting medium.. HT3: Experimental . Studies of Thermal Diffusivities and Heat Transfer Coefficients . Transient Heat Conduction. Many heat conduction problems encountered in . engineering . applications. involve . time as . Unsteady State Heat Transfer HT3: Experimental Studies of Thermal Diffusivities and Heat Transfer Coefficients Transient Heat Conduction Many heat conduction problems encountered in engineering applications Douglas Wilhelm Harder, . M.Math. . LEL. Department of Electrical and Computer Engineering. University of Waterloo. Waterloo, Ontario, Canada. ece.uwaterloo.ca. dwharder@alumni.uwaterloo.ca. © 2012 by Douglas Wilhelm Harder. Some rights reserved.. ComputersConduction cooling for modular embedded computers have been used for many years in applications where air cooling is not appropriate Standardization efforts in that domain have early helped t Shape Evolution of Heat Exchanging Surfaces… . P M V Subbarao. Professor. Mechanical Engineering Department. Forced Convection Cooling of Chips Using Air. Analytical Convective Heat Transfer. 1701 Newton’s law of cooling..