Archimedes number


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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.
References in periodicals archive ?
The similarity principle shows that any nondimensional velocity in the room can be given as a unique function of the Archimedes number, Ar, if the flow in the room is a fully developed turbulent flow (high Reynolds number flow) (see Tahti and Goodfellow [2001]).
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).
The curves that show different values of the Archimedes number give the limits within which the design graphs are valid.
NOMENCLATURE Ar Archimedes number [MATHEMATICAL EXPRESSION NOT REPRODUCIBLE IN ASCII] D column diameter at top of reactor section (m) [d.
g],-- 701 Froude number, Fr,-- 485 Archimedes number, Ar,-- 174 Solids-to-gas mass flow ratio, 10.
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.
In practice, it is necessary to use a high flow rate to obtain a low level of the concentration in the room, and this situation corresponds to the low Archimedes number in the graph.
This flow rate and load correspond to an Archimedes number of 120.
The room inlet Archimedes number (Ar), defined in Equation 1, is the ratio of thermal buoyancy force to inertial force.
Randal and Battams (1979) found that a corrected Archimedes number (Arc) of inlets can predict airflow patterns of buildings under non-isothermal ventilation conditions.
Critical Archimedes number (Ar) is a limit Ar value at which the diffuser air jet drops immediately after entering the room.
The principles of similarity show that any dimensionless velocity in the room can be given as a unique function of the Archimedes number if the flow in the room is a fully developed turbulent flow (high Reynolds number flow) (see Tahti and Goodfellow [2001]).