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3 cards from this section. Quick, good the night before a test.
Define specific energy in the context of open channel flow.
Think about energy forms like potential and kinetic.
What is the Froude number and why is it important?
Remember the comparison between flow velocity and wave speed.
What is the definition of specific energy?
Consider how energy levels are calculated in flows.
Is the following statement true or false? 'Supercritical flow occurs when the Froude number is less than 1.'
Reflect on the definitions of flow states.
A rectangular channel carries water at a velocity of 3 m/s with a flow depth of 2 m. Calculate the specific energy and Froude number. Based on these, determine if the flow is subcritical, critical, or supercritical.
Don't forget to calculate gravity as 9.81 m/s².
In a trapezoidal channel with a bottom width of 5 m, side slopes of 1:3, and a flow depth of 2 m, calculate the wetted perimeter and the hydraulic radius.
Make sure to visualize the trapezoidal shape when calculating.
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