Week 12 Transport Properties Flashcards
1
Q
what is the mean free path eqn and what is true of it
A
λ = τ
mean free path is independent of
2
Q
what is the flux of a quantity Q equation in the z direction
A
j(Q) = -1/3 N/V λmdQ/dz
3
Q
what is true of viscosity
A
it is independent of number density
4
Q
what is not true of flux when a temp gradient is present
A
is no longer independent of z
5
Q
what is the diffusion coefficient eqn
A
D = 1/3 λ
6
Q
what is Fick’s law eqn
A
jn = -D∇n
7
Q
what two ideas are combined to find diffusion eqn
A
ficks law and the continuity eqn
8
Q
what is the diffusion eqn
A
dn/dt = D∇^2n
