Abstract: An electromagnetic flow meter and method for monitoring the flow of a fluid is provided. In particular, the electromagnetic flow meter and method measure the axial velocity profile of a conducting fluid. The conducting fluid may be a conducting single phase fluid or a conducting continuous phase of a multiphase fluid. The conducting fluid may have a uniform flow profile or a non-uniform flow profile. The electromagnetic flow meter and method measure the axial velocity profile of a conducting fluid by dividing the flow cross section into multiple pixels and determining the axial velocity of the conducting fluid in each pixel. Having derived the axial velocity profile, the electromagnetic flow meter and method may further derive the volumetric flow rate of the conducting fluid. The electromagnetic flow meter and method may be suitable for measuring the axial velocity profile and optionally the volumetric flow rates of each phase of a multiphase fluid.

Abstract: The invention relates to an means and method for monitoring the flow of a fluid. The invention relates to an electromagnetic flow meter and method for measuring the axial velocity profile of a conducting fluid. The conducting fluid may be a conducting single phase fluid or a conducting continuous phase of a multiphase fluid. The conducting fluid may have a uniform flow profile or a non-uniform flow profile. The electromagnetic flow meter and method measure the axial velocity profile of a conducting fluid by dividing the flow cross section into multiple pixels and determining the axial velocity of the conducting fluid in each pixel. Having. derived the axial velocity profile, the electromagnetic flow meter and method may further derive the volumetric flow rate of the conducting fluid. The electromagnetic flow meter and method may be suitable for measuring the axial velocity profile and optionally the volumetric flow rates of each phase of a multiphase fluid.

Abstract: A multi-electrode capacitive apparatus for measuring multi-phase flows comprising a pipe through which the flow is directed having the electrodes, typically ten in number, disposed around an outer surface thereof, sensing means being provided for connection to each electrode by means of a switching arrangement, the switching arrangement being operable to vary the connections of the electrodes to the sensing means such that the electric field seen within the pipe rotates; averaging means being provided to determine the average capacitance measured over an integer number of rotations. The pipe can be formed from a material having substantially the same dielectric constant as the flowing material and is of sufficient thickness to optimise the angular sensitivity of the device for flow at the pipe wall. Typically, the internal radius of the pipe is about 0.7 of the radius of the electrode arrangement.

Abstract: A fluidic-oscillator type flowmeter has an inlet nozzle (1) leading into a chamber (2) with diverging side walls (3a, 3b). A splitter (8) has a blunt end opposite the inlet nozzle and defines outlet paths (4a, 4b) which lead from the chamber. The shape and position of the splitter are such that oscillating flow is encouraged across its face. Feedback channels (5a, 5b) lead from the side walls back to control ports (7a, 7b) which open into the chamber. The relative position of the splitter and feedback channel entrances is such that the downstream corners of the entrances to the feedback channels lie in the oscillating path of the edge of the flow which separates from the face of the splitter when the meter is in use.