BEGIN:VCALENDAR VERSION:2.0 PRODID:-//Sabre//Sabre VObject 4.5.8//EN CALSCALE:GREGORIAN BEGIN:VTIMEZONE TZID:Europe/Zurich X-LIC-LOCATION:Europe/Zurich TZURL:http://tzurl.org/zoneinfo/Europe/Zurich BEGIN:DAYLIGHT TZOFFSETFROM:+0100 TZOFFSETTO:+0200 TZNAME:CEST DTSTART:19810329T020000 RRULE:FREQ=YEARLY;BYMONTH=3;BYDAY=-1SU END:DAYLIGHT BEGIN:STANDARD TZOFFSETFROM:+0200 TZOFFSETTO:+0100 TZNAME:CET DTSTART:19961027T030000 RRULE:FREQ=YEARLY;BYMONTH=10;BYDAY=-1SU END:STANDARD END:VTIMEZONE BEGIN:VEVENT UID:news2040@dmi.unibas.ch DTSTAMP;TZID=Europe/Zurich:20260518T115823 DTSTART;TZID=Europe/Zurich:20260522T110000 SUMMARY:Seminar in Numerical Analysis: Santanu Manna (IIT Indore\, India) DESCRIPTION:This talk presents a numerical framework for elastic wave propa gation in fluid-saturated multi-porous media\, with particular emphasis on multi-phase flow interactions and constitutive characterization. The gove rning equations are derived using Lagrangian mechanics\, where the couplin g between the solid matrix and multiple pore fluids is modelled through ge neralised dissipation terms based on a multi-phase extension of Darcy’s law. This formulation enables a systematic representation of inter-phase m omentum transfer and permeability effects across distinct pore networks. T he effective elastic properties are identified via compliance-based Gedank en experiments\, providing a physically consistent approach to determining macroscopic constitutive parameters from idealized mechanical responses. This allows the model to capture the influence of multiple interacting por e systems without relying on purely empirical assumptions. The resulting s ystem supports multiple compressional wave modes associated with solid and fluid phases\, along with a rotational mode in the solid skeleton. A fini te element discretization is employed to simulate wave propagation\, and t he formulation is validated through dispersion analysis\, stability consid erations\, and convergence studies. The proposed framework highlights the critical role of multi-phase Darcy coupling and experimentally motivated p arameter identification in accurately modelling wave phenomena in complex multi-porous media.\\r\\nFor full-length work: https://doi.org/10.1098/rsp a.2023.0863\, Proc. A (2024) 480 (2290): 20230863.\\r\\nFor further inform ation about the seminar\, please visit this webpage [https://dmi.unibas.ch /de/forschung/mathematik/seminar-in-numerical-analysis/]. X-ALT-DESC:

This talk presents a numerical framework for elastic wave pro pagation in fluid-saturated multi-porous media\, with particular emphasis on multi-phase flow interactions and constitutive characterization. The go verning equations are derived using Lagrangian mechanics\, where the coupl ing between the solid matrix and multiple pore fluids is modelled through generalised dissipation terms based on a multi-phase extension of Darcy’ s law. This formulation enables a systematic representation of inter-phase momentum transfer and permeability effects across distinct pore networks. The effective elastic properties are identified via compliance-based Geda nken experiments\, providing a physically consistent approach to determini ng macroscopic constitutive parameters from idealized mechanical responses . This allows the model to capture the influence of multiple interacting p ore systems without relying on purely empirical assumptions. The resulting system supports multiple compressional wave modes associated with solid a nd fluid phases\, along with a rotational mode in the solid skeleton. A fi nite element discretization is employed to simulate wave propagation\, and the formulation is validated through dispersion analysis\, stability cons iderations\, and convergence studies. The proposed framework highlights th e critical role of multi-phase Darcy coupling and experimentally motivated parameter identification in accurately modelling wave phenomena in comple x multi-porous media.

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For full-length work: https://doi.org/10.109 8/rspa.2023.0863\, Proc. A (2024) 480 (2290): 20230863.

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For furthe r information about the seminar\, please visit this webpage.

DTEND;TZID=Europe/Zurich:20260522T123000 END:VEVENT END:VCALENDAR