effective size
Effective size
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effective size (E.S.)
The diameter of the particles in a granular sample (filter media) for which 10 percent of the total grains are smaller and 90 percent larger on a weight basis. Effective size is obtained by passing granular material through sieves with varying dimensions of mesh and weighing the material retained by each sieve. The effective size is also approximately the average size of the grains.
Effective Size
A term used in specifying sand size. It is the sieve size in millimeters that permits 10 percent (by weight) of the filter sand to pass.
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