Patent ID: 6378380
Filing Date: 2002-04-30
Classification: G01F

Abstract:
A method for measuring fluid flow characteristics in a multiphase fluid stream which passes through a gradiometer-venturi flow meter, the method comprising:measuring liquid holdup (&agr;l,I) at or near the inlet of the venturi; determining a slipfactor (S) which expresses the difference between the gas and liquid velocity at a selected location in the venturi, which slip factor is based on the measured level of liquid holdup; and calculating the fluid flow characteristics on the basis of an algorithm which takes into account the measured liquid holdup and slipfactor (S), characterized in that said algorithm takes into account the measured liquid holdup (&agr;l,I) at the inlet of the venturi and different slip factors at the inlet (Si) and in the throat of the venturi (St).