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Archimedes number

   Also found in: Wikipedia 0.01 sec.
Archimedes number [¦är·kə¦mēd‚ēz ′nəm·bər]
(fluid mechanics)
One of a dimensionless group of numbers denoting the ratio of gravitational force to viscous force.


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The similarity principles show that any dimensionless velocity in the room can be given as a unique function of the Archimedes number if flow in the room is fully developed turbulent (high Reynolds number flow); see Tahti and Good-fellow (2001).
If it is assumed that the flow in the room is a fully developed turbulent flow, it is possible to express the personal exposure index as a single-value function of the Archimedes number Ar without considering the Reynolds numbers involved.
The room inlet Archimedes number (Ar), defined in Equation 1, is the ratio of thermal buoyancy force to inertial force.
 
 
 
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