 Divergence in polar coordinates

ID: divergence-in-polar-coordinates

Codex  0 Created 2026-10-03 Updated 2026-10-06

For

u = u_{r} e_{r} + u_{θ} e_{θ}

\nabla \cdot u = \frac{1}{r} \frac{\partial ( r u _{r} )}{\partial r} + \frac{1}{r} \frac{\partial u _{θ}}{\partial θ} .

 New to topics? Read the docs here!