TRANSFERUL DE IMPULS - Cadre Didactice
TRANSFERUL DE IMPULS - Cadre Didactice
TRANSFERUL DE IMPULS - Cadre Didactice
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Ecuatia fundamentala a staticii<br />
• Ecuatia (49)<br />
fluidelor<br />
1 ⎛ ∂P<br />
r ∂P<br />
r<br />
⎜ i + j +<br />
ρ ⎝ ∂x<br />
∂y<br />
∂P<br />
∂z<br />
r⎞<br />
k ⎟<br />
⎠<br />
( F i + F j + F k )<br />
• se mai poate scrie:<br />
• forma vectorială a ecuaţiei Euler, în care<br />
operatorul (nabla) aplicat unei funcţii are<br />
expresia: ∇<br />
r 1 1<br />
F = grad P = ∇P<br />
(50)<br />
ρ ρ<br />
∂Ψ<br />
r ∂Ψ<br />
r ∂Ψ<br />
r<br />
∇ Ψ = i + j + k (51)<br />
∂x<br />
∂y<br />
∂z<br />
FENOMENE <strong>DE</strong> TRANSFER SI OPERATII UNITARE 74<br />
=<br />
x<br />
r<br />
y<br />
r<br />
z<br />
r