- #1
EricVT
- 166
- 6
Consider a cylindrical shell so that the cross sectional radius is some constant a.
In the first term of the divergence expression in cylindrical coordinates:
[tex] \frac{1}{r}\frac{\partial}{\partial r}(rA_{r}) [/tex]
When I multiply the radial component by r, do I go ahead and substitute r=a before I take the derivative with respect to r or do I substitute r=a after I take the derivative with respect to r?
Thanks a lot.
In the first term of the divergence expression in cylindrical coordinates:
[tex] \frac{1}{r}\frac{\partial}{\partial r}(rA_{r}) [/tex]
When I multiply the radial component by r, do I go ahead and substitute r=a before I take the derivative with respect to r or do I substitute r=a after I take the derivative with respect to r?
Thanks a lot.