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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2 citations
TL;DR: In this paper, a dynamical, thermal, and chemical equilibrium for isolated dark clouds is considered in the presence of small, isolated clouds, and the model is extended to the case of large clouds.
Abstract: Hydrostatic models of small, isolated dark clouds are presented. A dynamical, thermal, and chemical equilibrium is considered in these models.
2 citations
01 Apr 2018
2 citations
TL;DR: In this article, a generalisation of their result translated to the atmosphere is presented, extending the fluid velocity equations with an additional convection-diffusion equation representing pollutants in the atmosphere.
Abstract: Considered as a geophysical fluid, the polluted atmosphere shares the shallow domain characteristics with other natural large-scale fluids such as seas and oceans. This means that its domain is excessively greater horizontally than in the vertical dimension, leading to the classic hydrostatic approximation of the Navier-Stokes equations. The authors of the \cite{azerad2001mathematical} article have proved a convergence theorem for this model with respect to the ocean, without considering pollution effects. The novelty of this present work is to provide a generalisation of their result translated to the atmosphere, extending the fluid velocity equations with an additional convection-diffusion equation representing pollutants in the atmosphere.
2 citations
25 Jun 2020
TL;DR: In this paper, a guideline on how to calculate the downsizing potential of electric motors and inverters arising from variable transmission ratio based on the load regime of a given application is presented.
Abstract: Electro-hydrostatic compact drives are an emerging technology within a range of industrially available translational drive solutions, combining the specific advantages of hydraulic and electromechanical screw drives. Compared to electromechanical screw drives, hydrostatic drives can vary their transmission ratio with comparably little effort, giving them the key advantage of downsizing the electric drive components for a given load cycle. This paper provides a guideline on how to calculate the downsizing potential of electric motors and inverters arising from variable transmission ratio based on the load regime of a given application. Furthermore, a comprehensive systematisation of the actual switching process is described for systems that are switched by means of switching valves. The presented set of methodology is applied to demonstrators in order to validate the general findings.
2 citations