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Bounds of cavitation inception are experimentally determined in a creepingflow between eccentric cylinders, the inner one being static and the outerrotating at a constant angular velocity, {\Omega}. The geometric configurationis additionally specified by a small minimum gap between cylinders, H, ascompared with the radii of the inner and outer cylinders. For some values H and{\Omega}, cavitation bubbles are observed, which are collected on the surfaceof the inner cylinder and equally distributed over the line parallel to itsaxis near the downstream minimum gap position. Cavitation occurs for theparameters {H,{\Omega}} within a region bounded on the right by the cavitationinception curve that passes through the plane origin and cannot exceed theasymptotic threshold value of the minimum gap, Ha, in whose vicinity cavitationmay occur at H<Ha only for high angular rotation velocities.

Bounds of cavitation inception in a creeping flow between eccentric cylinders rotating with a small minimum gap