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Continuous Irregular and Intermittent Boil-off

A number of phenomena have been observed in which agitation modifies the structure of the surface sub-layer and thereby changes the evaporation rate. [Pg.60]

On a short time scale, surface evaporation is observed to vary continuously with time, with peaks and troughs in the evaporation mass flux, and hence the surface evaporation impedance, up to 10 % of the mean figure. This was the first discovery made on commencing the monitoring of boil-off rates using instantaneously recording vapour flow meters, with an integration time of less than 1 s. [Pg.60]

This observation was the first indication that evaporation is a dynamic process associated with intermittent convection of heat and mass through the surface. [Pg.60]


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Boil-off

Continuous and intermittent

Intermittent

Irregular

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