Hi,
I'm new at mathcad so maybe this is a basic issue.
I'm trying to solve this equation with find command, but i get a green box and no answer.
The green box indicates that Mathcad is trying to calculate.
When trying to solve symbolically (as you show), I also get the green box while Mathcad tries to find the solution. I did not wait long enough for it to finish. You can try letting it run in the background to see if it ever finishes.
Do you need a symbolic solution, or would a numerical solution work? When I try to solve numerically with d=0 as the guess value, I get an undefined error. However, when I change the guess to 0.00001, I get the following:
Your sking for a symbolic solution, but with the powers of d that's not going to work.
Problem is numerically solvable, using the root function.
(If 'difficult expression'=m, then 'difficult expression' - m must be zero, that's what the root function will search.)
Now the result is complex, did you expect that?
Success!
Luc
A real solution is found for smaller guess values.
I find no real solution.
Interesting. In using the Root method, I was able to get this solution only by a very close guess value:
using any fewer significant digits in my guess value resulted in a complex solution.
It is interesting. Especially to see that there's only a very narrow range where real solutions to the problem exist.
To check that the result is OK, feed it back:
Check!
Hi LucMeekes & Mark Gase,
Thanks for your reply ! I'm searching for a real solution, the value that i get should be the diameter of a critical orifice (for in-compressible flow).