PPT-Heat Conduction through Hollow Spheres

Heat and Mass Transfer DTE 122 Dr J Badshah University Professor cum Chief Scientist Dairy Engineering Department Sanjay Gandhi Institute of Dairy Technology Jagdeopath Patna. Heat transport - short distance. 1. No mass movement. 2. Interaction adjacent molecules. Magnitude - heat transfer. Determined by:. 1. thermal conductivity - material. a. Metals high. ma k e commerc l FEA program t thi Two-dimensional conduction:two or three-dimensional. In these cases we may apply a number of differentThese include analytical, graphical and numerical approaches Governing Equation:. Dirichlet Boundary Conditions:. Solution:. Heat Flux:. Heat Flow:. temperature . is not . a function of . k. Notes:. . A. is the cross-sectional area of the wall . perpendicular. 3.1 …………. Introduction. 3.2 …………. Biot and Fourier Number. 3.3 …………. . Lumped heat capacity analysis. 3.4 …………. Time constant and response of a thermocouple. 3.5 …………. Transient. 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. . Heat Transfer. Heat always moves from a warmer place to a cooler place.. Hot objects in a cooler room will cool to room temperature.. Cold objects in a warmer room will heat up to room temperature.. Question. 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. Conduction Convection . Radiation. Types of Heat transfer. Heat Transfer. Heat can be transferred in 3 ways. Conduction. Convection. Radiation. Heat flow depends on the temperature difference – . flows from hot to cold. Essential Standard. 6.P.. 3 Understand . characteristics . of energy . transfer and interactions of matter and energy.. Clarifying Objective. 6.P.. 3.1 Illustrate . the transfer of heat energy from warmer objects . 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..