- #1
good_phy
- 45
- 0
Hi i just learned fluide equation form chen textbok
The equation is [tex] mn\left[ \frac{\partial u}{\partial t}+(u\cdot\nabla)u\right]=qn(E+u\times B)-\nabla\cdot P - \frac{mn(u-u_{o})}{\tau}[/tex]. where P is pressure and last term is collision between charged particle and the nutral
I was confusing what is exactly [tex]\nabla\cdot P[/tex], force from pressure.
I think in strictly saying, in microsopic view, only electromagnetic force is imposing on each particle and pressure
is also E.M force. and E and B in this equation is Macroscopic field ( external field), not
microscopic field.
Is it right?
The equation is [tex] mn\left[ \frac{\partial u}{\partial t}+(u\cdot\nabla)u\right]=qn(E+u\times B)-\nabla\cdot P - \frac{mn(u-u_{o})}{\tau}[/tex]. where P is pressure and last term is collision between charged particle and the nutral
I was confusing what is exactly [tex]\nabla\cdot P[/tex], force from pressure.
I think in strictly saying, in microsopic view, only electromagnetic force is imposing on each particle and pressure
is also E.M force. and E and B in this equation is Macroscopic field ( external field), not
microscopic field.
Is it right?