“condensation”的概念、定义、翻译、参考文献-科学参考

condensation

Physics

The change of a vapour or gas into a liquid. The change of phase is accompanied by the evolution of heat (see latent heat).

Chemistry

The change of a vapour or gas into a liquid. The change of phase is accompanied by the evolution of heat (see latent heat).

Chemical Engineering

The change in state from a vapour to a liquid or a solid accompanied by the release of energy known as the heat of condensation, which has the same magnitude as the heat of vaporization at the same temperature. Condensation is the opposite of evaporation. The direct change in state from a vapour to a solid phase is called deposition.

A vapour may condense on a cold surface by either film condensation in which condensate forms a continuous layer of liquid that flows over the surface, or dropwise condensation in which condensate forms at nucleation sites where droplets tend to coalesce and may form into rivulets that flow under the influence of gravity. Although dropwise condensation is associated with higher transfer coefficients, it is difficult to maintain in practical situations.

Computer

See connected graph.

Geography

The change of a vapour or gas into liquid form, accompanied by the release of latent heat, altering the adiabatic temperature change in rising air. See Wang and Wang (1999) J. Atmos. Scis 56, 18 on the classic turbulence condensation theory. Condensation in meteorology can be caused by the cooling of a constant volume of air to dew point; the expansion of a parcel of air without heating; the evaporation of extra moisture into the air; the fall in the moisture-holding capacity of the air due to changes in volume and/or temperature; and contact with a colder material or air mass. The likelihood of water vapour condensing will depend on the saturation vapour pressures of water and ice at a given temperature, and/or the presence of condensation nuclei, since water vapour can cool well below 0 °C before condensation occurs. See condensation nuclei; bergeron–findeisen theory. The condensation level is the height at which rising air will cool, condense, and form clouds.

单词	condensation
释义	condensation Physics The change of a vapour or gas into a liquid. The change of phase is accompanied by the evolution of heat (see latent heat). Chemistry The change of a vapour or gas into a liquid. The change of phase is accompanied by the evolution of heat (see latent heat). Chemical Engineering The change in state from a vapour to a liquid or a solid accompanied by the release of energy known as the heat of condensation, which has the same magnitude as the heat of vaporization at the same temperature. Condensation is the opposite of evaporation. The direct change in state from a vapour to a solid phase is called deposition. A vapour may condense on a cold surface by either film condensation in which condensate forms a continuous layer of liquid that flows over the surface, or dropwise condensation in which condensate forms at nucleation sites where droplets tend to coalesce and may form into rivulets that flow under the influence of gravity. Although dropwise condensation is associated with higher transfer coefficients, it is difficult to maintain in practical situations. Computer See connected graph. Geography The change of a vapour or gas into liquid form, accompanied by the release of latent heat, altering the adiabatic temperature change in rising air. See Wang and Wang (1999) J. Atmos. Scis 56, 18 on the classic turbulence condensation theory. Condensation in meteorology can be caused by the cooling of a constant volume of air to dew point; the expansion of a parcel of air without heating; the evaporation of extra moisture into the air; the fall in the moisture-holding capacity of the air due to changes in volume and/or temperature; and contact with a colder material or air mass. The likelihood of water vapour condensing will depend on the saturation vapour pressures of water and ice at a given temperature, and/or the presence of condensation nuclei, since water vapour can cool well below 0 °C before condensation occurs. See condensation nuclei; bergeron–findeisen theory. The condensation level is the height at which rising air will cool, condense, and form clouds.
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