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Surface Tension

Consider the ...

Question

Consider the following statements:
1. Hydraulically most efficient channel section for an open channel flow will carry maximum discharge for a given area of cross section.
2. For a given cross sectional area hydraulic radius is maximum when the wetted perimeter is minimum.
Which of these statements is/are correct?

A

Both 1 and 2

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B

Neither 1 nor 2

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C

2 only

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D

1 only

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Solution

The correct option is A Both 1 and 2
(c)
The most economical channel carries maximum discharge for a given area of the cross-section.

$H y d r a u l i c r a d i u s = \frac{C r o s s - s e c t i o n a l a r e a}{W e t t e d p e r i m e t e r}$

Hydraulic radius is maximum when the wetted perimeter is minimum if the area is the same.

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