How is the water flow in a river during flood conditions classified in fluid mechanics_________________ flow?
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Answer: B. Unsteady non-uniform
Explanation
Flood conditions in a river vary with time making the fluid flow unsteady. Channel cross section geometry and flow velocities vary along the river making it non uniform. Combining time variation and spatial variation classifies river floods as unsteady non uniform flow. Fluid mechanics classifies flows based on whether velocity changes with time or spatial distance. Unsteady flow means fluid parameters fluctuate at specific channel points as time passes. Non uniform flow indicates that flow velocity differs between adjacent locations along the channel.
Civil engineers use unsteady non uniform flow models to design flood protection levees safely. Hydraulic routing software predicts flood wave propagation times along major natural river basins. Managing urban stormwater drainage systems requires analyzing transient unsteady flow conditions. Steady uniform flow describes constant velocity conditions over time and space like smooth pipe flow. Steady non uniform flow features spatial velocity changes but remains constant over time. Unsteady uniform flow assumes uniform channel velocity profiles that fluctuate simultaneously over time.
- Subject
- Engineering
- Category
- Chemical Engineering
- Topic
- —
- Difficulty
- medium
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