We consider the problem and normal oscillations (eigenoscillations) of system three connected (coupled to each other) pendulums with cavities filled one or several immiscible homogeneous fluids. study case partially dissipative where cavity first pendulum is completely two ideal fluids, second viscous third fluid. use methods functional analysis. prove theorem on correct solvability initial-bou...

Empty sella is a radiological-anatomical entity characterised by a sella turcica filled partially or completely with cerebrospinal fluid, leading to varying degrees of pituitary flattening. Literature reports a 5% 20% incidence of empty sella in unselected autopsies leading many to argue that it is an extreme normal variant. Endocrine dysfunction varies from 8% 25% with primary empty sella and ...

In a previous publication [O. A. M. Boote and P. J. Thomas, Phys. Fluids 11, 2020 (1999)10.1063/1.870065], we described a new banding pattern developing from particle segregation in particle-laden flow inside a partially fluid-filled, horizontal, rotating cylinder. Here we discuss long-term observations lasting up to several weeks revealing that the system can display an extremely rich spatiote...

We present a fast technique for simulating fluid-filled elastic objects with the Finite Element Method. By simulating the presence of fluid with hydrostatic fluid pressure, a quasi-static simulation of fluid can be achieved by applying a force boundary condition to the nodes on the fluidelastic interface. Using a proportional feedback control algorithm, a relationship between the volume and pre...