The physics interpretation of divergence and curl,it is possible to be seen very fast going to an infinitesimal cube.
In Cartesian coordinates, supposing an infinitesimal cube, trim in the origin, we can serve to us as the differential of the field to see its meaning:
\ \vec{\nabla} \cdot...
I am new in this place, am studying civil engineering in Spain,Madrid, and is something I do not understand in a theoretical exposition of the velocity/force potential.
They suppose that the external force that it acts in each point of the fluid and the speed, derive from scalar , so they...