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单词 Barotropic fluid
释义

Barotropic fluid

中文百科

正压

正压大气是当大气压力仅仅取决于大气密度、以及大气密度亦仅取于大气气压。因此,在正压大气内,等压面亦即为等密度面。

若相关大气乃理想气体,则等压面、等密度面与等温面亦为同一平面。因而,地转风不因大气高度改变而变化,故此大尺度环流亦不随高度变化。

由于正压大气具有这种特性,因此气象研究常假设正压大气以简化计算。

英语百科

Barotropic fluid 正压

Barotropic fluid stratification of pressure and density
Barotrope Atmosphäre
Barotroper Ozean

In fluid dynamics, a barotropic fluid is a fluid whose density is a function of pressure only. The barotropic fluid is a useful model of fluid behavior in a wide variety of scientific fields, from meteorology to astrophysics.

The density of most liquids is nearly constant (isopycnic), so it can be stated that their densities vary only weakly with pressure and temperature. Water, which varies only a few percent with temperature and salinity, may be approximated as barotropic. In general, air is not barotropic, as it is a function of temperature and pressure; but, under certain circumstances, the barotropic assumption can be useful.

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