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Difficult iteration equation in SMath
 Rank: Newbie
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Joined: 12/04/2012(UTC)
Posts: 4
Location: Netherlands
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Hello,
My compliments for SMath, it's a great program!
I've a question about the possibility of solving an iteration equation with SMath.
To calculate a pressure drop of air flow in a part a calculation is set up.
The equation tries to solve the speed.
A lot of different friction factors are involved, all dependent on Reynolds (and therefore speed).
I don't think the calculations itself are very hard, but there will be a lot of variables.
A friend of mine did something similar in Excel with Macros.
Is it possible to solve complex iteration equations in SMath? (and is it easier/better than Excel)
Are there any examples of iteration equations in SMath? (or with the same structure as SMath)
The exact equation is not yet finished.
I'm also a new user in SMath (I've a few hours experience in Mathcad 2001)
Thanks in advance,
Gerjan
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  Rank: Administration Groups: Registered, Advanced Member Joined: 23/06/2009(UTC) Posts: 1,740   Was thanked: 318 time(s) in 268 post(s)
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Hello Gerjan, Try to look in the "Civil Engineering Hydraulics/Fluid Mechanics" under Examples section on SMath Wiki. Regards, Radovan Edited by user 12 April 2012 19:21:32(UTC)
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 1 user thanked omorr for this useful post.
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Rank: Newbie
Groups: Registered
Joined: 12/04/2012(UTC)
Posts: 4
Location: Netherlands
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Thanks for your reply. Didn't see the Wiki page before. I found this example, and I think it will help me. I'm happy SMath can do this kind of calculations! I think further questions will arise as soon as I start with the model. Thanks for your help so far, I'll keep you guys informed. Gerjan
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Rank: Newbie
Groups: Registered
Joined: 12/04/2012(UTC)
Posts: 4
Location: Netherlands
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I want to calculate pressure losses over a part with different friction factors, length and hydraulic diameter.
For each of these factors I want to give a view values.
I've tried to put these values in a matrix but I don't know how to define each variable.
I also put a serie of data in one matrix, but it has to be square...
dp(v)=0,5*rho*[(f*L)/Dh]*v^2
Pressure loss should be calculated first with f1, L1 and Dh1.
And then f2, L2 and Dh2 and so on.
A summation should be done to calculate the total pressure losses.
Can anyone give me tips or an example how to do this?
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Rank: Administration Groups: Registered, Advanced Member Joined: 23/06/2009(UTC) Posts: 1,740 Was thanked: 318 time(s) in 268 post(s)
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Hello Gerjan,  file - dp.smYou should read some tutorials on the Wiki - TutorialsRegards, Radovan |
When Sisyphus climbed to the top of a hill, they said: "Wrong boulder!" |
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Rank: Newbie
Groups: Registered
Joined: 12/04/2012(UTC)
Posts: 4
Location: Netherlands
|
After some practice with help of the tutorials i've completed the calculation.
Thanks for your tips!
I made several smath files. Now i want to summarize these.
Is there an option to collect variables of different files on one sheet?
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Rank: Administration Groups: Registered, Advanced Member Joined: 23/06/2009(UTC) Posts: 1,740 Was thanked: 318 time(s) in 268 post(s)
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Hello Gerjan, Read this file Data files in order to figure out how to exchange data between SMath files. Read also this post - ImportData. ImportData() function has been implemented and I hope the exportData() will be in the next release. Regards, Radovan |
When Sisyphus climbed to the top of a hill, they said: "Wrong boulder!" |
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