理想流体中多孔球形粒子的声辐射力的研究  

Acoustic radiation force of porous spherical particle in an ideal fluid

作　　者：刘腾 赵越[1] 刘杰惠[1] 刘晓宙[1,2] Teng Liu;Yue Zhao;Jiehui Liu;Xiaozhou Liu(Key Laboratory of Modern Acoustics,Institute of Acoustics and School of Physics,Nanjing University,Nanjing,210093,China;State Key Laboratory of Acoustics,Institute of Acoustics,Chinese Academy of Sciences,Beijing,100190,China)

机构地区：[1]近代声学教育部重点实验室,南京大学声学研究所,南京210093 [2]声场声信息国家重点实验室,中国科学院声学研究所,北京100190

出　　处：《南京大学学报（自然科学版）》2023年第2期222-230,共9页Journal of Nanjing University（Natural Science）

基　　金：国家重点研发计划(2020YFA0211400);国家自然科学重点基金(11834008);国家自然科学基金(12174192);声场声信息国家重点实验室(SKLA202210);中国科学院水声环境特性重点实验室(SSHJ-KFKT-1701)。

摘　　要：主要根据Biot-Stoll多孔介质理论,推导了平面波入射到理想流体中多孔球形粒子的声散射系数以及所受声辐射力表达式,通过数值模拟分析了开孔和闭孔情况下多孔球形粒子在不同体孔隙率、不同面孔隙率以及不同药物材料下所受的声辐射力大小,并利用有限元仿真对理论结果进行了验证.从结果可以看出体孔隙率越大,多孔粒子所受的声辐射力越大,对于不同的药物粒子,由于各类性质不同,所以相对而言所受的声辐射力的波动较大.研究为流体中粒子的声操控提供了理论基础,有助于从药物材料、孔隙率等方面改善和发展用于医学相关领域的药物操控.Based on the Biot-Stoll porous media theory,the expressions of acoustic scattering coefficient and acoustic radiation force of a porous spherical particle in ideal fluid induced by incident plane wave are deduced theoretically.Furthermore,the amplitudes of the acoustic radiation forces of the porous spherical particles in both open-pore and closed-pore situations are analyzed through numerical simulation with various bulk porosity,surface porosity and drug materials.The theoretical results are verified via finite element simulation.Results show that the increasing of the bulk porosity generates the growth of the acoustic radiation force.Moreover,acoustic radiation forces for porous spheres with different drug materials exhibit significant fluctuations.This work provides a theoretical basis for the acoustic manipulation of the porous spherical particle in fluids and contributes to the improvement of drug manipulation in medical domain.

关 键 词：声散射 声辐射力 多孔粒子 平面波 药物材料 

分 类 号：O426.2[理学—声学]