Solve this multiple-choice question and choose the correct option.

Concept/Approach Specific energy E in open channels is the energy per unit weight of fluid, referenced to the channel bed: E = y + v2/(2g) where y is depth and v is mean velocity. Final AnswerSpecific energy is the total energy measured with respect to the datum through the channel bottom.

Curioustab

Open-channel flow: definition of specific energy Specific energy at a section is defined relative to the channel bed (datum through the bottom). Identify the correct description.

Mechanical Engineering Hydraulics and Fluid Mechanics Difficulty: Easy

Choose an option

A

Total energy per unit discharge
B

Total energy measured with respect to the datum passing through the bottom of the channel
C

Total energy measured above a fixed horizontal datum
D

Kinetic energy plotted above the free surface of water

Answer

Correct Answer: Total energy measured with respect to the datum passing through the bottom of the channel

Explanation

Concept/Approach

Specific energy E in open channels is the energy per unit weight of fluid, referenced to the channel bed: E = y + v²/(2g) where y is depth and v is mean velocity.

Final AnswerSpecific energy is the total energy measured with respect to the datum through the channel bottom.