Please find attached file. The subject name is Environmental Fluid Mechanics , Topic is Open channel flow.

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Please find attached file. The subject name is Environmental Fluid Mechanics , Topic is Open channel flow.


Topic 1-5 Governing eqn, Turbulance, Op...ass transport OCF, stratified flow.pdf
Answered 2 days AfterMay 13, 2022

Answer To: Please find attached file. The subject name is Environmental Fluid Mechanics , Topic is Open channel...

Dr Shweta answered on May 13 2022
93 Votes
Solutions
Ans 1: Given – Blackwood River has significant problem with Anoxia- low level of dissolv
ed oxygen-DO.
The competing effects of DO consumption by phytoplankton respiration and atmospheric reaeration causes vertical gradients in oxygen concentration.
Saturated DO concentration at surface due to reaeration is 10mg/L
Depth of river 1.5m, river slope 1/1000 and there is no flux boundary for DO
To find: Governing equation for vertical concentration profile of DO in stretch of river
Solution: Under the conditions of steady state flow and unidirectional mass transfer (in y direction) with no chemical reaction in the river, the transfer of oxygen will be:
Let us...
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