Recent content by Toodles

Thanks for this reply. Why do you say the top to bottom resistances are high and the side to side resitances are low? I would expect due to nonlinear effects that since the current is so large (assumedly exceeding the max current density of the conductor) in the side to side electrodes, that you...

Rotational current would be one with nonzero curl: $$\nabla \times \mathbf{j} \neq 0$$ And I am referring to the standard Maxwell equations; in particular Faraday's law $$-\frac{\partial \mathbf{B}}{\partial t} = \nabla \times \mathbf{E} $$ and Ohm's law $$\mathbf{j} = \sigma \mathbf{E} $$. If...

Hi everyone, Thanks for the replies. First off, I unfortunately can not give out a much better explanation of the problem nor can I elaborate on the rule of the magnetic field, but for my question here, it can be considered to not exist. Sorry! I understand what the current should do...

Sorry, I should change the figure. The electrodes are supposed to be touching the conducting medium. So there are infinitely large current right at the joining point of the electrodes (essentially a dipole here).

Hi, I am looking for some information regarding maximum current density in conducting mediums, such as a conducting fluid. Say that we have a setup like the figure that I have attached. We are looking down on a conducting medium with a uniform magnetic field coming out of the page and the...

This is what I have always thought, and I guess just more or less accepted. However, I am thinking about it now and have become confused. Say that you have a velocity gradient ∂u/∂x, which doesn't imply incompressibility. This will result in a normal viscous force of 2μ∂u/∂x according to stress...