Numerical simulation of beam drift effect in ultrasonic flow-meter

In the present work, we have performed numerical simulations of carry-along (sound drift) effect in ultrasonic flow-meter with various steering angles using an accurate, dispersion relation preserving (DRP) scheme. Validation has been performed with the experimental results by Kang et al. (2017) for the case of wave propagation along and opposite to the direction of the flowing medium. Linearized Euler equations have been solved for the simulation of the ultrasonic acoustic field. Various velocity profiles associated with uniform, laminar and turbulent are applied in acoustic field simulations while keeping the same average mean flow velocity. Results highlight that the final steered angle does not depend on the velocity profile but depends on the average mean velocity of the flow. However, flow measurement will be affected by the velocity profile since the propagating time depends upon the velocity profile. Present simulations can be used to design the ultrasonic flow-meter with a phased array transducer with steering & focusing capabilities to achieve high signal to noise ratio (SNR). (C) 2019 Elsevier Ltd. All rights reserved.