单词 | bubble point |
释义 | > as lemmasbubble point bubble point n. a set of conditions at which bubbles begin to form; spec. the temperature at or above which, at a given pressure, bubbles of vapour form in a liquid containing more than one component; (also) the pressure at or below which, at a given temperature, such bubbles form.In quot. 1871 as part of an extended metaphor relating to business activity, perhaps referring to sense A. 2c. ΚΠ 1871 W. Elder Questions of Day xii. 168 They have arbitrary zero, freezing, temperate, and boiling or bubble points marked upon the mercurical indicator. 1922 Trans. Amer. Electrochem. Soc. 40 176 The slightest trace of grease, oxide or foreign material in contact with the electrode is sufficient to introduce uncertainty and irregularities in the bubble point. 1929 C. S. Cragoe Thermal Prop. Petroleum Products iii. 8 The vapor pressure of a many-component liquid..is defined as the equilibrium pressure on a two-phase system composed of a relatively large volume of liquid and such a small volume of vapor that any decrease in the vapor volume would not alter the pressure appreciably. The temperature at which the vapor pressure, as defined above, is equal to one standard atmosphere is designated the normal bubble point. 1949 Our Industry (Anglo-Iranian Oil Co.) (ed. 2) 330 (Gloss.) Gas saturation pressure (Bubble point), the pressure at which the dissolved gas content of the oil will begin to come out of solution at any given temperature. 2005 M. R. Simmons Twilight in Desert xv. 325 When the reservoir pressure drops below ‘bubble point’ in each key field, the gas dissolved in the oil will immediately begin to emerge from the oil solution and create a gas cap at the top of the reservoir. < as lemmas |
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