Article révisé par les pairs
| Résumé : | In the present work, on the basis of the first principle of thermodynamics, we establish the law of variation of temperature with pressure in a saturated mass sphere containing liquid water into which saturated air containing also liquid water penetrates.Admitting that the considered mass of air and the air which is introduced into it form a closed system, the problem consists in the study of the adiabatic transformations of a polytherm closed system.Owing to a few hypothesis (cf (24) and (28)), we obtain formula (35) which is a particular case of the formula (36) to which leads the study of the entrainment of non saturated air into a cumulus.Taking the example of a buble which moves in the middle of a cumulus, we show that the rate of variation of temperature with pressure is, to the first approximation, that of the standard adiabatic. |
