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Dear Friends, I need to make a hydraulic profile of a channel. In which a control section is a free fall downstream of it. Use the software to little more than two months and do not have much skill with it. I'm trying to resolve the EDO (dx / dy = (IJ) / (1-Fr²), but I am not succeeding because an error appears in which I do not know identify. Attached hereto the file to anyone who can help me. Thanks in advance!
Anderson Farias
Hi,
I do not see any error messages in your document. Using Mathcad Prime 3.1.
I also don't see any error, using Prime 3.0.
It is possible that the user is not satisfied with the mathematical model for their calculations.
Maybe. We have to wait for clarification.
Dear Richard and Vladimir, I apologize for not having specified the right problem.
It happens when I insert the value to 0 mH, or consider a section of rectangular and not trapezoidal channel, is where the problem arises.
The important fact to be reported is that when I make the validation of my calculation model with the HEC-RAS software, which uses the same calculation methodology, the figures do not match.
I thank you help!
AF
It happens when I insert the value to 0 mH, or consider a section of rectangular and not trapezoidal channel, is where the problem arises.
Do you mean 0 m_sub_h? I don't get any error if I insert 0 for that variable.
How do you define it to be rectangular rather than trapezoidal?
The important fact to be reported is that when I make the validation of my calculation model with the HEC-RAS software, which uses the same calculation methodology, the figures do not match.
So what is the answer supposed to be?
Where does the equation come from? If you get a different answer, then you are doing something differently. The first thing to check is the equation. Also check the units for the Manning number (which is not unitless)
Anderson Farias wrote:
... It happens when I insert the value to 0 mH ...
Please provide a screenshot with this error.
VladimirN. wrote:
Anderson Farias wrote:
... It happens when I insert the value to 0 mH ...
Please provide a screenshot with this error.
And a copy of the worksheet that produces the error!
Stuart