Download me 259 final exam review

ME 259 MIDTERM EXAM #2 REVIEW
Open book, notes, homework, & mind
Coverage:
Numerical methods notes
Text, Chapter 4
sections 4.4-4.5
Text, Chapter 5: sections 5.1-5.8
Text, Chapter 6: sections 6.1-6.6, 6.8-6.9 (excluding concentration BL, mass transfer topics)
Text, Chapter 7: all
Text, Chapter 8: all
Understand:
 the limitations of the lumped capacitance method (LCM).
 the limitation of the one-term, exact solution approximation for 1-D transient conduction in plane
walls, long cylinders, and spheres with uniform convection.
 the importance of the Biot and Fourier numbers in transient conduction.
 why and when a solid undergoing transient conduction can be viewed as “semi-infinite”.
 the concept of superposition in forming multidimensional transient conduction solutions from 1-D
solutions.
 the basic differences between the finite-difference method (FDM) and finite-element method (FEM).
 how a steady-state numerical solution differs from a transient numerical solution
 the development of the velocity and thermal boundary layers and their effects on the convection
coefficient; laminar vs. turbulent.
 the effect of turbulence on convection heat transfer.
 the significance of the Reynolds, Prandtl, and Nusselt numbers.
 which properties have the greatest influence on convection heat transfer.
 how an empirical correlation is developed.
 the differences between entry region and fully-developed flow convection in pipes.
 the differences between constant surface heat flux and constant surface temperature convection heat
transfer.
 how to enhance convection heat transfer in pipes.
Know How To:
 use the lumped capacitance method (LCM) and check its validity.
 use the exact solutions and/or Heisler charts (Figures D.1-D.9) for 1-D transient conduction in plane
walls, long cylinders, and spheres with uniform convection.
 use the family of semi-infinite solid solutions for 1-D transient heat conduction.
 determine if a flow is laminar, turbulent, or mixed.
 evaluate properties at the proper temperature.
 calculate local and average convection coefficients, local heat flux (or local temperature), and overall
convection heat rate for parallel flow over a flat plate.
 calculate average convection coefficients for crossflow over a cylinder and sphere, banks of tubes,
and impinging jet flow on a flat plate.
 determine hydrodynamic/thermal entry lengths in pipes and if a flow is fully-developed.
 determine pressure drop for pipe flow with given length, diameter, and mean velocity.
 determine the convection coefficient, outlet mean temperature, and heat transfer rate for flow through
pipes or noncircular ducts with i) constant surface temperature, ii) constant surface heat flux, and iii)
a known external flow with constant freestream temperature.