ft2arquivo2 - HW/Tutorial # 1 WWWR Chapters 15-16 ID...

Info iconThis preview shows pages 1–7. Sign up to view the full content.

View Full Document Right Arrow Icon
HW/Tutorial # 1 WWWR Chapters 15-16 ID Chapters 1-2 Tutorial #1 WWWR #15.25, 15.26, 15.1, 15.2, 15.3, 16.1, 16.2. ID # 1.11, 1.13. To be discussed during the week 17 Jan. – 21 Jan. , 2011. By either volunteer or class list. HW # 1 ( Self study – solution is provided ) WWWR #15.15, 15.21, 15.22. ID # 2.2, 2.3 .
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Fundamentals of Heat Transfer Conduction , Convection , and Radiation Heat Transfer Mode Ref. ID Figure 1.1 (p 2) Heat transfer (or heat) is thermal energy in transit due to a temperature difference
Background image of page 2
Conduction Heat Transfer T k A q dx dT k A x q - = - = ; First mechanism - molecular interaction (e.g. gas) Greater motion of molecule at higher energy level (temperature) imparts energy to adjacent molecules at lower energy levels Second mechanism – by free electrons (e.g. solid)
Background image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Thermal Conductivity Physical origins and rate equation (Ref. ID; Figure 1.2) Association of conduction heat transfer with diffusion energy due to molecular activities.
Background image of page 4
Thermal Conductivity of Gas Estimation of the thermal conductivity of gas Ref. WWWR pp202-203 (Self Study) Derived from the gas kinetic theory: (1) Considering the summation of the energy flux associated with the molecules crossing the control surface; (2) The number of molecules involved is related to average random molecular velocity. (3) κ : Boltzmann constant, d: molecular diameter, m: mass per molecule. m T d k / 3 2 5 . 1 1 κ π = [Unit = W/(m-K)]
Background image of page 5

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Thermal Conductivity of Solid Estimation of the thermal conductivity of solid Ref. WWWR pp204 (Self Study) (1) Derived from the Wiedemann, Franz, Lorenz Equation (1872). (2) The free electron mechanism of heat conduction is directly analogous
Background image of page 6
Image of page 7
This is the end of the preview. Sign up to access the rest of the document.

Page1 / 52

ft2arquivo2 - HW/Tutorial # 1 WWWR Chapters 15-16 ID...

This preview shows document pages 1 - 7. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online