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 effect of turbulent pressure on the structure and vibrational stability of stars with extensive convective envelopes is not negliable, and a theory of non-local convection based on the dynamic equations of correlation functions is proposed.
10 citations
Patent•
12 Jun 1997
TL;DR: In this article, a fixed point switch (KH,KD) was used to switch on and off the braking function of a fixed-point switch for a fixed transmission ratio fixed point.
Abstract: The transmission has several selection ranges and/or a device for hydrostatic bridging in the form of a fixed point switch (KH,KD) with a first hydrostatic unit (A) of adjustable vol. and a second unit (B) of adjustable or constant vol. and a summing planetary gear. The hydrostatic units exchange pumping and motor functions at a range change, which takes place when the coupling elements of the coupling to be selected and the fixed point switch are synchronised. The hydrostatic transmission can be controlled as a brake at a selected transmission ratio fixed point. The braking function can be manually or automatically switched on and/or off independently of or dependent on the operating brake system. The hydrostatic braking can be manually or automatically varied continuously or discontinuously . The braking system has a safety function independent of the hydrostatic braking effect.
10 citations
TL;DR: In this paper, a thin wing, flying in air above a dynamic water surface, is analyzed in the asymptotic limit as the clearance-to-length ratio tends to zero, leading to a nonlinear integral equation for the one-dimensional pressure distribution beneath the wing, which is solved numerically.
Abstract: Steady potential flow about a thin wing, flying in air above a dynamic water surface, is analysed in the asymptotic limit as the clearance-to-length ratio tends to zero. This leads to a non-linear integral equation for the one-dimensional pressure distribution beneath the wing, which is solved numerically. Results are compared with established “rigid-ground” and “hydrostatic” theories. Short waves lead to complications, including non-uniqueness, in some parameter ranges.
10 citations
TL;DR: In this article, the authors show that when self-consistent hydrostatic adjustment is included with temperature feedback, there can be significant differences in the computed change in local ozone concentration in two frames of reference (changes in ozone at constant altitude and changes at constant pressure) to illustrate the importance of the frame of reference.
Abstract: Calculated perturbations to stratospheric ozone are generally thought to be reduced when temperature feedback is included in the model. We find that when self-consistent hydrostatic adjustment is included with temperature feedback, there can be significant differences in the computed change in local ozone concentration. We present results in two frames of reference (changes in ozone at constant altitude and changes at constant pressure) to illustrate the importance of the frame of reference. Including hydrostatic adjustment is particularly important for calculations of the change in local ozone at constant altitude due to CFM, CO2 and H2O perturbations because large changes in the temperature structure are predicted. Only small differences are computed for increases in N2O. Air density adjustment in a constant pressure frame of reference is important when local temperature changes are large.
10 citations
TL;DR: In this article, a bulk-flow thermohydrodynamic (THD) analysis is developed for prediction of the static and dynamic performance characteristics of turbulent-flow, process-liquid, hydrostatic journal bearings (HJBs).
Abstract: A bulk-flow thermohydrodynamic (THD) analysis is developed for prediction of the static and dynamic performance characteristics of turbulent-flow, process-liquid, hydrostatic journal bearings (HJBs ). Pointwise evaluation of temperature and hence liquid properties is achieved through the solution of the energy equation in the fluid film with insulated boundaries, and justified for fluid film bearings with external pressurization. Fluid inertia within the film lands and at recess edges is preserved in the analysis. Flow turbulence is accounted through turbulence shear parameters based on friction factors derived from Moody's formulae. The effects of fluid compressibility and temperature variation in the bearing recesses are included. Numerical solution and results are presented in the second part of this work and compared with some limited experimental data for a liquid hydrogen (LH 2 ) bearing.
10 citations