Abstract
The present paper describes a new measuring technique of bubble velocity inair-magnetic fluid two-phase flow for flow regimes of slug flow and churn flow. The proposed technique using the electromagnetic induction achieves a non-contact measurement. In the present method, the measurement was carried out by analyzing two signals, which are the induced electromotive forces obtained in two sets of pick-up coils, with an alternating magnetic field. Inorder to verify the credibility of the measurement, an alternative experiment for measuring bubble velocity was carried out together with a theoretical comparison with an existing model. As a result,it was proved that the proposed measurement particularly gave good estimations of bubble velocity particularly in slug and churn flows observed in vertical two-phase flow.
