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Experimental Investigation of Fluid-Structure Interaction Problems with Applications to Marine Environments
Başlık:
Experimental Investigation of Fluid-Structure Interaction Problems with Applications to Marine Environments
Yazar:
Jalalisendi, Mohammad, author.
ISBN:
9780355991093
Yazar Ek Girişi:
Fiziksel Tanımlama:
1 electronic resource (281 pages)
Genel Not:
Source: Dissertation Abstracts International, Volume: 79-10(E), Section: B.
Advisors: Maurizio Porfiri Committee members: Sean D. Peterson; Iskender Sahin; Stefano Ubertini; George Vradis.
Özet:
The interaction between structures and fluids gives rise to a variety of physical phenomena occurring in different fields of science, ranging from biology to marine and polar engineering. The coupling between the flow field and the structural dynamics makes it specifically challenging to numerically and experimentally investigate these phenomena. Understanding fluid-structure interactions is especially crucial in the design of marine vessels that should withstand hydrodynamic loading during their lifespan. Previously, experimental efforts in marine applications have mainly focused on identification of global loads or point measurements using pressure sensors. Beyond the difficulties in the installation and measurement using pressure sensors, the lack of spatially resolved data for the hydrodynamic loading is a key limitation. The motivation for this dissertation stems from such a paucity of temporally and spatially resolved data for the pressure experienced by solid bodies impacting the water surface.
This dissertation builds on previous work by our group on the indirect reconstruction of pressure from particle image velocimetry (PIV) data. PIV is a non-intrusive technique for velocity measurements inside a flow field. By cross-correlating pairs of subsequent images, PIV measures the displacement vectors of a group of particles in a small window, called interrogation windows. The acquired displacements provide the instantaneous fluid velocity vectors on an equally spaced grid points. The velocity data can be then used to estimate the pressure distribution in the flow field using Navier-Stokes equations. From pressure data, the hydrodynamic loading on the solid surface can be estimated, which, in turn, can be used to calculate the forces and moments acting on the body. With respect to water entry problems, the inference of the pressure field can be used to complement local (pressure sensors) or global (built-in accelerometers) measurements, toward a precise quantification of the distribution of the hydrodynamic loading experienced by the wedge during water entry. In this dissertation, we demonstrate the feasibility of this approach in a number of relevant marine applications. Upon identifying a few critical gaps in the technical literature, we seek to fill those through an integrated experimental and theoretical framework which advances fundamental research in experimental fluid mechanics, structural dynamics, and fluid-structure interactions.
Notlar:
School code: 1988
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Yer Numarası | Demirbaş Numarası | Shelf Location | Lokasyon / Statüsü / İade Tarihi |
---|---|---|---|
XX(678572.1) | 678572-1001 | Proquest E-Tez Koleksiyonu | Arıyor... |
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