Simulations of photoacoustic wave propagation using a finite-difference time-domain method with Berenger's perfectly matched layers.

摘要: This study developed a numerical solution of the general photoacoustic generation equations involving heat conduction theory and state, continuity, Navier–Stokes in 2.5D axisymmetric cylindrical coordinates using finite-difference time-domain scheme. The techniques included staggered grids Berenger’s perfectly matched layers (PMLs), linear-perturbation analytical solutions were used to validate simulation results. results at different detection angles durations laser pulses agreed with theoretical estimates within an error 2% absolute differences. It was also demonstrated that simulator can be develop advanced imaging methods. performance PMLs assessed by comparisons traditional first-order Mur’s boundary condition. At edges domain, ten-layer PML medium polynomial attenuation coefficient grading from 0 5×106 m3/kg s designed t...