Publication Date:
2019-08-27
Description:
The specific area of an aqueous foam contained in a tube is obtained by determining the fraction of the quantity of light emitted by a source and diffused by the specific area of the column of the foam. The velocity of the waves of weak pressure (which propagate in the air with the velocity of sound) is measured by noticing the moment when the wave penetrates the column and the moment when, having reached the opposite side, it determines a variation of the light diffused by the area of the latter.
Keywords:
FLUID MECHANICS AND HEAT TRANSFER
Type:
NASA-TT-20347
,
NAS 1.77:20347
Format:
text