Tuning the characteristics of photoacoustic pressure in a laser-induced photoacoustic generator: A numerical study
| Autor: | Jeeseong Hwang, Sangmo Kang |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
Pressure wave
Materials science Applied Mathematics Multiphysics Acoustics Photoacoustic imaging in biomedicine 02 engineering and technology Laser 01 natural sciences law.invention Generator (circuit theory) 020303 mechanical engineering & transports Transducer 0203 mechanical engineering law Modeling and Simulation 0103 physical sciences Thermal Material properties 010301 acoustics |
| Zdroj: | Applied Mathematical Modelling. 94:98-116 |
| ISSN: | 0307-904X |
| DOI: | 10.1016/j.apm.2020.12.029 |
| Popis: | We present a new numerical approach to model a laser-induced photoacoustic generator (LIPAG) by integrating thermal, elastic, and acoustic multiphysics simulations in a linear regime. Our unique approach implements a fully-explicit staggered-grid finite-difference time-domain method with perfectly matched layers to remove common artifacts in numerical simulations due to finite-sized computational domains. The approach simulates the dynamics of photoacoustic (PA) pressure signals and local temperature fields using realistic LIPAG models to elucidate details of the underlying PA pressure generation mechanism. We also report on how the pressure wave characteristics are affected by the variation of the key parameters of the pulsed light and material properties. Our simulation technique, capable of adjusting a wide range of key parameters in the LIPAG model, may provide a guidance in the design of LIPAGs to achieve desired PA pressure characteristics for testing the performance of acoustic transducers and their calibrations. |
| Databáze: | OpenAIRE |
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