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hydraulic radius

 
Sci-Tech Dictionary: hydraulic radius
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(hi′drö·lik ′rād·ē·əs)

(fluid mechanics) The ratio of the cross-sectional area of a conduit in which a fluid is flowing to the inner perimeter of the conduit.

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Geography Dictionary: hydraulic radius
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Also known as hydraulic mean, this is the ratio of the cross-sectional area of a stream to the length of the wetted perimeter. The wetted perimeter is the cross-sectional length of a river bed. The hydraulic radius is a measure of the efficiency of the river in conveying water. If the value of the hydraulic radius is large, a large area of water in the cross-section is affected by each metre of the bed, and there is thus little friction.

Architecture: hydraulic radius
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The ratio of the cross-sectional area of fluid flow through a pipe to the wetted perimeter of the pipe.

 
 

 

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Sci-Tech Dictionary. McGraw-Hill Dictionary of Scientific and Technical Terms. Copyright © 2003, 1994, 1989, 1984, 1978, 1976, 1974 by McGraw-Hill Companies, Inc. All rights reserved.  Read more
Geography Dictionary. A Dictionary of Geography. Copyright © Susan Mayhew 1992, 1997, 2004. All rights reserved.  Read more
Architecture. McGraw-Hill Dictionary of Architecture and Construction. Copyright © 2003 by McGraw-Hill Companies, Inc. All rights reserved.  Read more