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germes de cavitation

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<strong>germes</strong> <strong>de</strong> <strong>cavitation</strong><br />

Bulle : equilibres mécanique et diffusif sont<br />

incompatibles<br />

cet équilibre est-il stable ?<br />

R<br />

P g +P v<br />

Liqui<strong>de</strong> P ∞ , C s g<br />

Pg+Pv=P∞ + 2γ/R<br />

perturbation<br />

P g +P v<br />

Liqui<strong>de</strong> P ∞ , C s g<br />

R resorption du germe<br />

R phénomène opposé<br />

Le double équilibre diffusif et mécanique<br />

est instable.<br />

En milieu naturel une pellicule organique

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