October 2017
Intermediate to advanced
816 pages
25h 46m
English
Using the energy flux, e, to carry out an energy balance on our annulus (Figure 12-15) with system volume 2πrΔrΔz, we have
(Energy flow in at r) = er Acr = er · 2πrΔz
(Energy flow in at z) = ez Acz = ez · 2πrΔr

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Dividing by 2πrΔrΔz and taking the limit as Δr and Δz → 0

The radial and axial energy fluxes are

Substituting for ...