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Guided waves propagating in a piezoelectric plate immersed in a conductive fluid

In this research we report theoretical model and experimental measurements for the leaky Lamb wave propagation behaviors in a X-cut lithium niobate immersed in a conductive fluid. Starting with wave equations, a partial wave analysis procedure is taken for the modeling of plane wave reflection coefficient, which characterizes the dispersion relation of piezoelectric plate immersed in a dielectric fluid. Fluid conductivity is modeled by modeling the fluid as lossy dielectric media. Bulk wave ultrasonic transducers with V-shape arrangement are used in this particular experiment, running in pitch-catch manor. Close comparison with fairly well agreement between theory and measurements is obtained.