- #1
Smed
- 36
- 1
Hi, I'm having trouble understanding how to perform the following calculation:
[tex]
u=(u,v,w)
[/tex]
[tex]
(\nabla u + (\nabla u)^T) : \nabla u
[/tex]
I get the following by doing the dot product of the first term and then adding the dot product of the second term, but I'm pretty sure it isn't correct.
[tex]
2\left(\frac{\partial u}{\partial x}\right)^2
+ 2\left(\frac{\partial v}{\partial y}\right)^2
+ 2\left(\frac{\partial w}{\partial z}\right)^2
[/tex]
Could someone please shed some light on how the double inner product should work?
Thanks
[tex]
u=(u,v,w)
[/tex]
[tex]
(\nabla u + (\nabla u)^T) : \nabla u
[/tex]
I get the following by doing the dot product of the first term and then adding the dot product of the second term, but I'm pretty sure it isn't correct.
[tex]
2\left(\frac{\partial u}{\partial x}\right)^2
+ 2\left(\frac{\partial v}{\partial y}\right)^2
+ 2\left(\frac{\partial w}{\partial z}\right)^2
[/tex]
Could someone please shed some light on how the double inner product should work?
Thanks