Transient Conduction Flow Chart

Transient Conduction Flow Chart - (requires extensive...

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Roadmap to Completing a Transient Heat Transfer Problem Find Bi = Use lumped capacitance: Bi < 0.1 Bi > 0.1 Calculate Fo = One-term approximation: Use entire series: Not enough info. to calculate Bi ? Assume Bi < 0.1 and then verify afterwards. Energy generation? (Eqn. 5.6) Heisler charts (Eqn. 5.25) OR If Bi does not < 0.1, you can not use the LC method. Fo < 0.2 Fo > 0.2 Plane wall: (Eqn. 5.49a) (Eqn. 5.50a) (Eqn. 5.40a) Infinite cylinder: Sphere: See Table 5.1 to find values for C 1 and Z 1 , and Appendix B.4 to find values for J 0.
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Unformatted text preview: (requires extensive computation; computer software needed) Examine geometry of object Has all finite surfaces Has ONE surface that extends to infinity Semi-infinite medium: Multi-dimensional effects: 2D or 3D heat transfer See App. B.2 for solving erf functions. Constant Ts = T(0,t) Constant heat flux (Eqn. 5.59) Surface convection (Eqn. 5.60) (Eqn. 5.57) 2D ex.: 3D ex.: See Chp. 5 Suppl. section 2, Fig. 5S.11 for all geometries. Semi-infinite: Cylinder: Plane wall: (Eqn. 5.39a)...
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