[Far]

I have solved flow in two rotating cylinders and also applied magnetic filed using MHD module.

As a results, I have obtained x and y components of induced magnetic field.

My question is that,

1. How do I get tangential component of induced magnetic filed?

[FMDenaro]

Originally Posted by Far

I have solved flow in two rotating cylinders and also applied magnetic filed using MHD module.

As a results, I have obtained x and y components of induced magnetic field.

My question is that,

1. How do I get tangential component of induced magnetic filed?

In the cartesian system you have



m=mx i + my j


while in the polar system you have that the same vector is



m=mr ir + mt it

Therefore

m.it = mt =mx i.it + my j.it


You just need to consider the angles, very simple.

[Far]

Originally Posted by FMDenaro

In the cartesian system you have



m=mx i + my j


while in the polar system you have that the same vector is



m=mr ir + mt it

Therefore

m.it = mt =mx i.it + my j.it


You just need to consider the angles, very simple.

i.it = cos theta and j.it = sin theta?