Diffusion

Question 1

Loi de Fick

Answer 1

j(M,t) = -Dgrad(n(M,t))

[D] = m².s^-1

Question 2

Loi d’échelles particulaire

Answer 2

L² = D Td

Question 3

Loi de Fourier

Answer 3

j_Q= - Ygrad(T)

Y = lambda

[Y] = Wm^-1.K^-1

Question 4

conducto convection

Answer 4

jcc=h(Tsolide-Texterieur)

[h] = W.m^-2.K^-1

Question 5

Loi d’échelle thermique

Answer 5

Dth = y/uc

L² = Dth Td

Question 6

Résistance thermique