Formula for two adjacent weirs
Formula for two adjacent weirs
(OP)
I am looking at a flow control/flow splitting device using two weirs set at different levels and adjacent to each other in the same stream. Flow volumes are large max 450l/s. Any ready formulas out there for calculating the head or flow for this arragement?





RE: Formula for two adjacent weirs
Hope this helps.
saxon
RE: Formula for two adjacent weirs
Other threads on this site state where one can get a current or older Cameron versions.
rmw
RE: Formula for two adjacent weirs
RE: Formula for two adjacent weirs
sounds like you need a hand book on open channel irrigation
most of the documented weir flow fornulas are for normal flow with known upstream conditions.
RE: Formula for two adjacent weirs
But if all you want to do is achieve a flow split where +/-15% accuracy is OK then you have got a chance. From what I have seen on weirs the flow disturbance diminishes rapidly with distance, and if you have about 18 inches (450 mm) the weirs will have little effect on each other.
As I have said here several times before - the answer depends on the question, so the question has to be clearly stated if you want a clear answer.
RE: Formula for two adjacent weirs
There are some relevant formulae at:
www.seanmoran.co.uk/Water%20Feature%20Design.htm
there are also lots of useful tools for this sort of thing (quite a few of them free)at www.lmnoeng.com
Hope this helps
Seán
www.seanmoran.co.uk