Topic
Hydrostatic equilibrium
About: Hydrostatic equilibrium is a research topic. Over the lifetime, 2451 publications have been published within this topic receiving 62172 citations.
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TL;DR: In this article, the mesoscale vertical velocity induced by stress changes in the surface layer as a function of the size of the rough patch in relation to environmental parameters is evaluated.
Abstract: We evaluate the mesoscale vertical velocity induced by stress changes in the surface layer as a function of the size of the rough patch in relation to environmental parameters. The nature of the flow per- turbation strongly depends on the relation between the width of the rough patch and the two natural scales of the flow, i.e. the inverse inertia wave number and the inverse of the Scorer parameter. When the width of the rough patch is comparable to the inverse inertia wave number or larger, the atmospheric perturbation is trapped, the vertical scale equals the depth of the stress surface layer, and the horizontal scale equals the Ross- by radius. When the width of the rough patch is larger than the inverse of the Scorer parameter, but smaller than the inverse inertia wave number, the atmospheric perturbation is a hydrostatic gravity wave with a verti- cal wave number equal to the Scorer parameter. When the width of the rough patch is comparable to the inverse of the Scorer parameter, the atmospheric per- turbation is a propagating lee wave with a vertical wave number equal to the Scorer parameter. When the ambient flow is strong over a small rough patch, the flow is irrotational. The same limitations, inherent to the linear gravity waves excited by the forcing in the atmosphere (e.g. mountain waves, gravity waves ini- tiated by convection, etc.), apply to the mesoscale per- turbation induced by a rough patch.
3 citations
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TL;DR: In this paper, the properties of the Newtonian forces acting on a test particle in the field of the Kerr black hole geometry were studied and it was shown that the centrifugal force and the Coriolis force reverse signs at several different locations.
Abstract: We study the properties of the ’Newtonian forces’ acting on a test particle in the field of the Kerr black hole geometry. We show that the centrifugal force and the Coriolis force reverse signs at several different locations. We point out the possible relevance of such reversals particularly in the study of the stability properties of the compact rotating stars and the accretion discs in hydrostatic equilibria
3 citations
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08 Jul 1988
TL;DR: In this article, the authors proposed a bridge circuit to measure a differential pressure with high precision by using diffused resistance layers 13a-13d sensitive to the hydrostatic pressure on the same semiconductor monocrystalline plate.
Abstract: PURPOSE:To make it possible to measure a differential pressure with high precision, by providing a first bridge circuit obtaining a differential pressure output comprising a hydrostatic error using a diffused resistance layer as a pressure sensitive element and a second bridge circuit obtaining a hydrostatic pressure output using a diffused resistance layer for compensation. CONSTITUTION:It becomes possible to measure a fluid pressure with high precision without any influence of a hydrostatic pressure by providing diffused resistance layers 13a-13d sensitive to the hydrostatic pressure on the same semiconductor monocrystalline plate 1 other than diffused resistance layers 3a-3d for detecting a differential pressure and constituting a bridge circuit so as to offset a hydrostatic pressure error using these diffused resistance layers 3. A first bridge circuit outputting the differential pressure comprising the hydrostatic pressure error and a second bridge circuit outputting only the hydrostatic pressure are separately constituted and an output amplifier of the second bridge circuit is provided as a variable gain type. As a result, compensation with high precision becomes possible.
3 citations
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TL;DR: In this paper, the effects of pressure, both hydrostatic and uniaxial, on the thermal conductivity of insulators are evaluated in the high-temperature range, assuming a constant relaxation time.
Abstract: The effects of pressure, both hydrostatic and uniaxial, on the thermal conductivity of insulators are evaluated The calculation is carried out in the high-temperature range, assuming a constant relaxation time Comparison of the calculated results for hydrostatic pressure with the available experimental data shows reasonable agreement The effect of uniaxial compression is found to be somewhat smaller than that of hydrostatic pressure
3 citations
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TL;DR: In this article, the equations of mass continuity and of hydrostatic equilibrium of a relativistic stellar configuration in D space-time dimensions (D ≥/ 4) with a spherical symmetric gravitational field are obtained.
Abstract: The equations which describe the hydrostatic equilibrium of a relativistic stellar configuration inD space-time dimensions (D ≥/ 4) with a spherical symmetric gravitational field are obtained. With suitable transformations, the equations of mass continuity and of hydrostatic equilibrium are given in a non-dimensional form. With the obtained equations the homogeneous stellar model is studied and some stability criteria are obtained inD (D ≥/ 4) space-time dimensions.
3 citations