BEGIN:VCALENDAR VERSION:2.0 PRODID:-//Talks.cam//talks.cam.ac.uk// X-WR-CALNAME:Talks.cam BEGIN:VEVENT SUMMARY:High-order algorithms for time- and frequency-domain wave propagat ion models - Mahadevan Ganesh (Colorado School of Mines) DTSTART:20230420T130000Z DTEND:20230420T134500Z UID:TALK198760@talks.cam.ac.uk DESCRIPTION:Efficient simulations of  \;acoustic wave propagation in t hree dimensional regions with multiple structures are fundamental for nume rous applications. Robust mathematical modeling of the underlying time-dep endent multiple scattering \; physical process  \;is crucial for d esigning fully-discrete high-order computational methods for multiple scat tering simulations. Development of related algorithms are based on celebra ted continuous mathematical equations either in the time- or frequency-dom ain\, with the latter based on mathematical manipulations.Consequently\, t he meaning of the term "multiple scattering" varies depending on the conte xt in which it is used. It has been argued in the physics literature that the \; continuous frequency-domain (FD) multiple scattering model is a purely mathematical construct\, \; and that in the time-domain (TD) m ultiple scattering becomes a definite physical phenomenon. \;\nIn rece nt years there has been substantial development of computational multiple scattering algorithms in the FD.  \;From the context of computational multiple scattering\, it is important to ensure that the simulated solutio ns represent the definite physical multiple scattering process. In this ta lk\, we describe our recent contributions to the development of high-order wave propagation computational models in both  \;time- and frequency- domains\, and argue that spectrally accurate FD  \;scattering algorith ms are crucial for efficient and practical simulation of physically approp riate TD multiple scattering in unbounded regions with multiple structures . \;(This talk is based on collaborative work with Drs. Dominguez\, Ha wkins\, and Le Louer.) LOCATION:Seminar Room 1\, Newton Institute END:VEVENT END:VCALENDAR