A mathematical model of unsteady collapsible tube behaviour
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Parametric analysis of multi membrane based pumping flow model with induced magnetic field
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2023, Sensors and Actuators A: PhysicalRetinal venous pulsation: Expanding our understanding and use of this enigmatic phenomenon
2016, Progress in Retinal and Eye ResearchCitation Excerpt :In the early twenty first century, VPP was noted to be also increased in subjects with glaucoma (Abegao Pinto et al., 2013; Fang et al., 2014; Graham et al., 2013; Jonas, 2003a; Morgan, 1999; Morgan et al., 2004; Pillunat et al., 2014; Seo et al., 2012; Stodtmeister, 2008), retinal venous occlusion (Beaumont and Kang, 1994; Jonas, 2003b), diabetes (Cybulska-Heinrich et al., 2015), disk oedema from neuritis or ischaemia (McCulley et al., 2003), carotico-cavernous sinus fistulae (Jonas and Groden, 2003) and patients with elevated orbital pressure from disorders like Grave’s thyroid orbitopathy (Jonas, 2004). In the last twenty years there has been a huge increase in literature concerning both the clinical association of retinal vein pulsation alteration in various diseases, its measurement but also its physical modelling (Bertram and Pedley, 1982; Bertram and Sheppeard, 2000; Conrad, 1969a; Heil and Jensen, 2003; Kamm and Pedley, 1989; Meyer-Schwickerath et al., 1995; Pielhop et al., 2015; Tang et al., 2015). The concept of there being a flow discontinuity along the central retinal vein has been explored and analogous models created by engineers and physicists.
Experimental characterization of the oscillatory behavior of a quasi-two-dimensional collapsible channel
2016, Journal of Fluids and StructuresCitation Excerpt :While the Starling Resistor lends itself to experimentation, it provides a significant challenge for simulations given the complex 3D buckling behavior of the tube, the near-closure of the fluid passage, and potential self-collisions of the deformable tube (see Heil and Hazel (2011) for a discussion of analytical and numerical results for the 3D Starling resistor). However, describing the tube shape with a “tube law” (Whittaker et al., 2010) coupled with lumped parameter or 1D fluid models provides a simplified approach for simulating the Starling resistor (Shapiro, 1977; Bertram and Pedley, 1982; Cancelli and Pedley, 1985; Jensen, 1990, 1992). The 1D fluid model may provide useful estimates of bulk flow, but it cannot resolve all flow features, and may rely on ad-hoc assumptions for estimating viscous losses (Cancelli and Pedley, 1985), which have been demonstrated to be incorrect (Luo and Pedley, 1998).
Fluid-Structure Interactions: Volume 2: Slender Structures and Axial Flow
2016, Fluid-Structure Interactions: Volume 2 Slender Structures and Axial Flow
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Present address: Centre for Biomedical Engineering, University of New South Wales, P.O. Box 1, Kensington, Australia 2033.