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In a constant-head permeability test, the length of the specimen is 200 mm and the cross sectional area is 78.5 cm2. If k = 2.1 x 10^-2 cm/sec, and a rate of flow of 130 cm3/min has to be maintained during the test, what should be the head difference across the specimen?

Respuesta :

Answer:26.28 cm

Explanation:

In permeability test k is given by

[tex]k=\dfrac{qL}{Ah}[/tex]

where

k=Coefficient of permeability

q=Length of specimen

A=area of cross-section

h=constant head causing flow

[tex]h=\dfrac{q\times L}{A\times k}[/tex]

[tex]h=\dfrac{130\times 20}{60\times 78.5\times 2.1\times 10^{-2}}[/tex]

[tex]h=26.28\ cm[/tex]

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