CHME 333 Workbook Handouts - Chapter 1

CHME 333 Workbook Handouts - Chapter 1 - CHME 333 Workbook...

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1 CHME 333 Workbook Chapter 1 – Introduction to Heat and Mass Transfer Importance of heat and mass transfer o Affects every-day life in numerous ways o Heat Transfer – _____________________________________________ ± Transfer from ________________ to _____________________ ± Examples of heat transfer: ____________________________ _____________________________ _____________________________ o Mass Transfer – _____________________________________________ ± Transfer from _________________ to ____________________ ± Examples of mass transfer: ____________________________ _____________________________ _____________________________
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2 Objectives of this course o _____________________________________________________________ _____________________________ ± In contrast to ______________ , where concern is systems at equilibrium and we calculate the __________________ of heat/work transferred. ± **Exercise** Can there heat transfer between system and surroundings at equilibrium? ± **Exercise** Can there be mass transfer between system and surroundings at equilibrium? Organization of this course o First – heat transfer; heat transfer is more intuitive o Then mass transfer o The governing equations are of the same form for both heat and mass transfer ± ___________ Chapter 1 Objectives o Overview of the three modes of heat transfer: ___________ , _________ , _______ ± Understand the definitions of each mode ± Memorize and apply the governing equations to simple examples
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3 o Conduction – Heat transfer in a _______________________ (gas or liquid) due to the __________________________________________________ ± ____________________________ ± Random translational, rotational, and vibrational energy o Convection - Heat transfer due to the combined influence of ________________ ______________________________ o Radiation - Energy that is _______________ due to _____________________ __________________________________ and is transported as _______________ ________________________ . ± Although radiation originates from matter, its transport does not require a material medium and occurs most efficiently ______________ .
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4 Heat Transfer By Conduction o Described by _____________________ ± General (vector) form of Fourier’s Law: Math review: write the expanded form of Fourier’s Law for Cartesian coordinates.
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5 ** Exercise ** - Application to one-dimensional, steady-state conduction across a plane wall of constant thermal conductivity: First, draw control volume and identify heat transfer processes Write Fourier’s Law for the system Simplify the equation This is a heat flux – how do you get the total heat transfer rate?
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6 Heat Transfer by Convection o Relation of convection to flow over a surface and development of velocity and thermal boundary layers: o Described by _______________________________ ±
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This note was uploaded on 03/11/2011 for the course CHEME 333 taught by Professor Anthony during the Spring '11 term at UNL.

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CHME 333 Workbook Handouts - Chapter 1 - CHME 333 Workbook...

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