energie_interne.py

Created by magantojulhad

Created on January 15, 2024

940 Bytes


energie interne
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conduction : propagation de lénergie 
se fait sans déplacement de matière. 
Lagitation des atomes est diffusée 
de proche en proche

convection :  lagitation des atomes 
est transmise de proche en proche et 
transportée par mouvement du fluide
________________________________
flux thermique : 
  
fi = energie / delta(t)
fi (flux thermique) en W
enegie en J
delta(t) (duree) en s

Theta c = source chaude
Theta f = source froide

fi = S(theta(c)-theta(f)) / Rth
fi (flux thermique) en W
S = surface en m**2
temperature (theta) en K
Rth = resistance thermique en 
m**2*K*W**-1
_______________________________
Resistance thermique

Rth = e / lambda
Rth = resistance thermique en 
m**2*K*W**-1
e = epaisseur en m
lambda = conduc thermique en
W*K**1*m**1

pour plusieurs couches on 
additionne les Rthermiques
comme en ingé exo mur 
(ou g eu 13.7 fais chier)

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