Recent content by seanl

ok thanks for all the help i managed to verify it. Turns out as well as not understanding exactly what gradU was i made a mistake in another part of my working so all good now!

yeah but in this case its acting on a vector not a scalar. In the textbook i was looking at the only options for applying the grad operator to a vector field were a dot product or a cross product. The grad U term on the RHS of the equality i posted doesn't appear to be either and when i tried to...

both sides are scalars if that's what you're asking. My experience with index notation is kind of limited so I'm not sure exactly what that first equation you've written represents, could you expand it out in terms of Ux, Uy, Uz and dx, dy and dz so I'm certain I'm interpreting that correctly

hi, I'm trying to follow a derivation in a paper and this equation is confusing me: (u'.\nabla)U = (\nablaU).u' Where U and u' are velocities. The operation of del on the vector U without a dot or cross product is giving me some grief. Can someone explain how this works to me...