After fixing an issue with an earlier solve block I am now finding this,
Please advise and thank you!
ACCEPTED SOLUTION
Accepted Solutions
Main problem is that variable Ws is not defined - not as a variable or vector (its defined as a function!).
But what do you mean by L = |Zb| ?
Actually a vector L can't equal the scalar |Zb| but Prime would interpret this constraint that each element in vector L should equal the scalar on the right hand side.
Did you possibly mean |L|=|Zb| ?
Was Ws meant to be uses as the function (of Q) you defined on top of the sheet?
Main problem is that variable Ws is not defined - not as a variable or vector (its defined as a function!).
But what do you mean by L = |Zb| ?
Actually a vector L can't equal the scalar |Zb| but Prime would interpret this constraint that each element in vector L should equal the scalar on the right hand side.
Did you possibly mean |L|=|Zb| ?
Was Ws meant to be uses as the function (of Q) you defined on top of the sheet?
First equation is NPSHA = NPSHR
Then the relationship between the pipe length L and the elevation Zb. From my understanding they are supposed to be the same as they represent the NPSHA (available). But I will verify this with my professor, the solution you gave me of |L| would give me individual values for each diameter which if needed is a quick change.
Had to replace Ws with Wp which I had changed earlier on another post.
Thank you Werner
Looks like Wp is the very same as Ws(Q) which I suggested 🙂
I have no expertise at all in the field you are working in, but if that constraint in question would be OK and both values in L are supposed to be the same as |Zb|, then there would be no need to define L as a vector of values!
Actually it would not be necessary to use L at all in the solve block - you could as well replace Li by Zb in the first equation, solve for Pb and Zb only and then set all values of L to the absolute value of Zb:
I can't imagine that this really would be what its supposed to be, though.
