Hydrostatic equilibrium

About: Hydrostatic equilibrium is a research topic. Over the lifetime, 2451 publications have been published within this topic receiving 62172 citations.

Moist Convection at a Surface Cold Front

Abstract: The motion of a surface cold front in an environment that is unstable to moist convection is studied with the aid ofboth hydrostatic and nonhydrostatic two-dimensional models. Simulations with the hydrostatic model essentially extend the work reported by Ross and Orlanski. It is shown that when deep convection occurs, Coriolis turning of the flow into the convective line creates a poleward low-level jet ahead of the front. It is also shown that after the generation and decay of the first convective element, another line develops on the order of a day later. It is found that the intensity of this line increases significantly ira north-south gradient of moisture is specified. The periodicity in convective activity at the front is explained in terms of an inertial gravity oscillation in the low-level convergence. The first convective system, which decays when the subeloud layer is dried out by the convection, forces a geostrophic imbalance in the surface front and the surrounding environment. In ret...

Hydrostatic spindle dynamic design system and its verification

Abstract: A design system for hydrostatic spindle is presented in light of the dynamic synthesis, which is based on the laws of the fluid mechanics, engineering thermodynamics and rotor dynamics. The finite element theory and hydrostatic principle are integrated into the design process, which provides not only the analyses and determination of the stiffness and temperature rise of the hydrostatic bearing but also the dynamic performance optimization. The proposed design system was implemented through a hydrostatic spindle on ultra-precision machining tools with the flycutting process.

On the hydrostatic equilibrium of the interstellar gas.

Abstract: The hydrostatic equilibrium of the interstellar gas-field system perpendicular to the galactic plane in the neighborhood of the Sun has been reexamined. It is demonstrated that the hydrostatic equilibrium condition of the interstellar gas may be formulated independently from the dynamics of halo gas and halo magnetic fields. The distribution of interstellar gas and magnetic fields satisfying hydrostatic and Poisson's equations with distance above the galactic plane is evaluated and compared with the observed distribution as inferred from 21 cm and synchrotron radiation measurements. It appears from the present study that a single-phase description of the interstellar gas is not adequate to account for the observations, whereas a two-component gas model, assuming that the interstellar gas clouds are not directly coupled to the interstellar magnetic field, seems to provide a natural explanation of the distribution of interstellar gas and magnetic fields perpendicular to the galactic plane up to distances of about 500 pc above and below the midplane.

Physics of Stressed Solids

Abstract: The internal energy of a system is subdivided into a work or potential function and a thermal or kinetic function, the former expressed in terms of the current electrostatic theory of intercrystalline bonding, and these functions then examined for variations of temperature, hydrostatic pressure, unidirectional stress and combined hydrostatic and unidirectional pressure. From these considerations a theory is evolved which not only seems satisfactorily to explain and correlate phenomena of deformation, creep or plastic flow, cold working, elastic after‐working, rupture, shear and certain other phenomena hitherto described as ``anomalous'' effects but has been corroborated experimentally in some of its predictions, in particular for the effect of hydrostatic pressure on deformation and compressive strength. The mechanism evolved consists of two processes—one an elastic deformation which is a function of the strain or potential energy of the system. Failure occurs here by ``brittle'' rupture wherein the maxim...