TRANSFERUL DE IMPULS - Cadre Didactice
TRANSFERUL DE IMPULS - Cadre Didactice
TRANSFERUL DE IMPULS - Cadre Didactice
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Echilibrul absolut al fluidelor în<br />
câmpul de forte gravitational<br />
•iar ecuaţia (48) devine:<br />
dP = ρ ⋅ g ⋅ dz ∫dP = ρ g ∫<br />
• din care rezultă:<br />
↔<br />
•Dacă P 0 reprezintă presiunea la suprafaţa<br />
unui lichid (H 0 = 0), ecuaţia (54) devine:<br />
P<br />
P<br />
FENOMENE <strong>DE</strong> TRANSFER SI OPERATII UNITARE 77<br />
H<br />
H<br />
0 0<br />
dz<br />
( H H )<br />
P = −<br />
P = P + ρ ⋅ g ⋅<br />
0<br />
(53)<br />
− P ρ g 0<br />
0 (54)<br />
H<br />
(55)
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