Multiphase flow metering is still a challenging research area, especially when flow of immiscible liquids is considered. Actual flow models in oil and water mixtures treat, in most cases, the flow as a homogenous mixture omitting the nature of the dispersion, the slippage between phases and its implications on the measurements accuracy. Computational fluid dynamics have provided substantial improvement in capturing the flow features of multiphase mixtures. The present work is related to numerical simulations of flows through a modified orifice plate meter combined with a bluff body. The flow simulation using a mesoscopic approach has revealed the existence of a pulsation mechanism that has a characteristic frequency proportional to the flow rate.

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