Multi-phase flow measurement in a conduit is accomplished by generating a spin in the flowing fluids and/or entrained solids, by which the centrifugal force separates the flowing components by density. The isolated flow in the central part of the conduit is measured. The denser isolated fractions flowing...http://www.google.es/patents/US5203211?utm_source=gb-gplus-sharePatente US5203211 - Multi-phase flow measurement
