Assertion: deceleration's time | /r/HasProperty | taken by central part of the fluid
Facets:
value: to reduce to this level
type: PURPOSE
Source sentences:
text: It is characterized by the thickness, d, of a layer close to the wall where the rotation rate is half its initial value, and by τ 1 , the time taken by the central part of the fluid to reduce to this level: (24.2) d = R ( E Ω o