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dc.contributor.authorZhang, Junjian
dc.contributor.authorZheng, Zhongquan C.
dc.contributor.authorKe, Guoyi
dc.identifier.citationThe Journal of the Acoustical Society of America 145, 589 (2019); doi: 10.1121/1.5087826en_US
dc.description.abstractSimulations of ultrasound wave propagation inside biological tissues have a wide range of practical applications. In previous studies, wave propagation equations in lossy biological media are solved either with convolutions, which consume a large amount of memory, or with pseudo-spectral methods, which cannot handle complicated geometries effectively. The approach described in the paper employed a fractional central difference method (FCD), combined with the immersed boundary (IB) method for the finite-difference, time-domain simulation. The FCD method can solve the fractional Laplace terms in Chen and Holm’s lossy-medium equations directly in the physical domain without integral transforms. It also works naturally with the IB method, which enables a simple Cartesian-type grid mesh to be used to solve problems with complicated geometries. The numerical results agree very well with the analytical solutions for frequency power-law attenuation lossy mediaen_US
dc.description.sponsorshipThis research is partly supported by the U.S. Army under a cooperative Agreement No. W911NF-14-2-0077en_US
dc.publisherAcoustical Society of Americaen_US
dc.rights© 2019 Acoustical Society of America.en_US
dc.titleTime-domain simulation of ultrasound propagation with fractional Laplacians for lossy-medium biological tissues with complicated geometriesen_US
kusw.kuauthorZhang, Junjian
kusw.kuauthorZheng, Zhongquan C.
kusw.kudepartmentAerospace Engineeringen_US
kusw.oanotesas per SHERPA/RoMEO

Author's Pre-print: green tick author can archive pre-print (ie pre-refereeing) Author's Post-print: grey tick subject to Restrictions below, author can archive post-print (ie final draft post-refereeing) Restrictions: 6 months embargo Publisher's Version/PDF: grey tick subject to Restrictions below, author can archive publisher's version/PDF Restrictions: 6 months embargo General Conditions: On author's institutional website, governmental websites, institutional repository or funders' designated repository Authors version only on free E-print servers Publisher copyright and source must be acknowledged Publisher's version/PDF may be used on authors personal website or employers website only Must link to publisher abstract Set statements to accompany pre-print and post-print deposit
kusw.oaversionScholarly/refereed, author accepted manuscripten_US
kusw.oapolicyThis item meets KU Open Access policy criteria.en_US

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© 2019 Acoustical Society of America.
Except where otherwise noted, this item's license is described as: © 2019 Acoustical Society of America.