Topic
Hydrostatic equilibrium
About: Hydrostatic equilibrium is a research topic. Over the lifetime, 2451 publications have been published within this topic receiving 62172 citations.
Papers published on a yearly basis
Papers
More filters
••
TL;DR: In this paper , a linearization theory is proposed for representation of the acoustic scattering process of the rubber coating with a large static predeformation caused by the hydrostatic pressure, and a constitutive model with hyperelasticity and viscoelasticity is employed for characterizing the dynamic behavior of rubber with a static preformation.
9 citations
••
TL;DR: In this paper, a new isostatic model for the Earth's gravity field is presented based on a simple hypothesis of layers approximating constant density contrasts, which leads to a new set of spherical harmonic coefficients for the gravitational potential.
Abstract: A new isostatic model for the Earth's gravity field is presented based on a simple hypothesis of layers approximating constant density contrasts. The spherical layer distribution used to describe the hydrostatic equilibrium of the Earth's masses leads to a new set of spherical harmonic coefficients for the gravitational potential. First attempts to quantify the information content of these coefficients led to the outcome that they seem to explain the observed gravity field for a certain wavelength band, while they are insufficient for short and very long wavelengths. A synthesis of the derived coefficients over specific degree ranges provided a computation of band-limited geoid undulations on a global scale. The association of these potential quantities with known tectonic structures, such as the topography of the core-mantle boundary, strengthens the belief that the interpretation of Earth gravity models, especially those arising from global digital elevation models, should be considered in close relation with deep-Earth structure.
9 citations
••
01 Jan 2012TL;DR: In this paper, a nonlinear model of a hydrostatic squeeze film damper has been developed and the results are discussed and compared with the linear model which is restricted to only small vibrations around the equilibrium position.
Abstract: The aim of this research is to study the non-linear dynamic behaviour of a flexible shaft supported by hydrostatic squeeze film dampers which are filled with a Negative Electro-Rheological fluid (NERF). In order to study the effect of the electro-rheological fluid on the dynamic behaviour of a flexible shaft, a non linear model of a hydrostatic squeeze film damper has been developed and the results are discussed and compared with the linear model which is restricted to only small vibrations around the equilibrium position. A new control system is proposed to reduce the transient response of the shaft, by applying an electric field in order to modify the viscosity of the NER fluid in the hydrostatic journal, and thus control its damping. The results of this control show that it is possible to effectively monitor the electric field and the viscosity of the fluid inside the hydrostatic squeeze film dampers (HSFD) for controlling flexible shaft vibration.
9 citations
••
TL;DR: Phase stability limit of cubic boron nitride (c-BN) has been investigated by the crystal structure search technique and it indicated that this limit is ∼1000 GPa at hydrostatic pressure condition.
Abstract: Phase stability limit of cubic boron nitride (c-BN) has been investigated by the crystal structure search technique. It indicated that this limit is ∼1000 GPa at hydrostatic pressure condition. Above this pressure, c-BN turns into a metastable phase with respect to rocksalt type boron nitride (rs-BN). However, rs-BN cannot be retained at 0 GPa owing to its instability at pressure below 250 GPa. For non-hydrostatic pressure conditions, the phase stability limit of c-BN is substantially lower than that under hydrostatic pressure conditions and it is also dramatically different for other pressure mode.
9 citations
••
TL;DR: In this paper, numerical simulations of blood flow in arteries with a variable stiffness and cross-section at rest using a finite volume method coupled with a hydrostatic reconstruction of the variables at the interface of each mesh cell were performed.
Abstract: We performed numerical simulations of blood flow in arteries with a variable stiffness and cross-section at rest using a finite volume method coupled with a hydrostatic reconstruction of the variables at the interface of each mesh cell. The method was then validated on examples taken from the literature. Asymptotic solutions were computed to highlight the effect of the viscous and viscoelastic source terms. Finally, the blood flow was computed in an artery where the cross-section at rest and the stiffness were varying. In each test case, the hydrostatic reconstruction showed good results where other simpler schemes did not, generating spurious oscillations and
nonphysical velocities.
9 citations