How to use the solve function in this task - Сообщения
#1 Опубликовано: 02.06.2024 20:33:38
#2 Опубликовано: 02.06.2024 22:24:24
Take care :
Your CoolProp function, as you write it, does not change the sign, between the two limits of the variable p :
![2024-06-02 17_15_56-SMath Solver - [3-2-CoolProp-Solve.sm_].png](/ru-RU/file/ZH6vav/2024-06-02-17_15_56-SMath-Solver---_3-2-CoolProp-Solve_sm___png)
Your CoolProp function, as you write it, does not change the sign, between the two limits of the variable p :
Do to others as you would like them to do to you!
Knowledge is of no value unless you put it into practice - Chekhov
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Valery Ochkov 02.06.2024 23:27:00
#3 Опубликовано: 02.06.2024 23:27:35
Thanks,
send please the sm-file with the solution
send please the sm-file with the solution
#4 Опубликовано: 03.06.2024 00:42:55
Hi,
The problem, as you formulated, seems as not having a solution in real numbers, in order to be solved with the solve routine.
I'm sorry but I have no time to reformulate your problem.
If you intend to solve it numerically, try to check the continuity of the function and the fact that in the range you look for solution there is at least one change of the function value sign.
The problem, as you formulated, seems as not having a solution in real numbers, in order to be solved with the solve routine.
I'm sorry but I have no time to reformulate your problem.
If you intend to solve it numerically, try to check the continuity of the function and the fact that in the range you look for solution there is at least one change of the function value sign.
Do to others as you would like them to do to you!
Knowledge is of no value unless you put it into practice - Chekhov
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Valery Ochkov 03.06.2024 00:59:00
#5 Опубликовано: 03.06.2024 01:46:02
The problem as stated in the opening post, actually has a solution in the given range.
Yet, I don't see an alternative to using brute force to tame the coolprop function: sampling and interpolation.
Yet, I don't see an alternative to using brute force to tame the coolprop function: sampling and interpolation.
Martin Kraska
Pre-configured portable distribution of SMath Studio: https://en.smath.info/wiki/SMath%20with%20Plugins.ashx
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Valery Ochkov 03.06.2024 01:50:00
#6 Опубликовано: 03.06.2024 02:12:41
Hi. The guess values, in this case the range, are part of the solution, this means that you must know where the numerical procedure works fine. In this case the interval 1 MPa ... 6 MPa.
3-2-CoolProp-Solve.sm
Best regards.
Alvaro.
3-2-CoolProp-Solve.sm
Best regards.
Alvaro.
#7 Опубликовано: 03.06.2024 10:47:51
Thanks, Martin and Alvaro
See please the problem in attach
Fireless-Locomotive.sm
PS
Alvaro!
And what about the book?
See please the problem in attach
Fireless-Locomotive.sm
PS
Alvaro!
And what about the book?
#8 Опубликовано: 03.06.2024 12:58:22
Hi Valery. This could be an option.
Fireless-Locomotive.sm
I'm pretty busy right now! Sorry.
Alvaro.
Fireless-Locomotive.sm
...
PS
Alvaro!
And what about the book?
I'm pretty busy right now! Sorry.
Alvaro.
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Valery Ochkov 03.06.2024 16:04:00
#9 Опубликовано: 03.06.2024 16:29:42
It works! By p.0=240 atm
Fireless-Locomotive.sm
But by p.0=140 atm ---???
Check please 1-2-3 chapters.
My student from Cuba is waiting for it!
Fireless-Locomotive.sm
But by p.0=140 atm ---???
Check please 1-2-3 chapters.
My student from Cuba is waiting for it!
#10 Опубликовано: 05.06.2024 21:16:15
... Check please 1-2-3 chapters.
My student from Cuba is waiting for it!
Hi Valery. I find it quite inappropriate that what is a voluntary collaboration helping on regarding a translation, and therefore supposedly free of commitment on both sides, is publicly claimed in the forum. This situation seems to reflect some type of irresponsibility on my part as I am failing to make some type of commitment, which, I insist, there is none. I would sincerely like to receive some kind of explanation as to why you are making a public complaint about a translation job on my part when there is no agreed commitment.
Best regards.
Alvaro.
#11 Опубликовано: 05.06.2024 23:25:56
Please forgive me, of course I'm wrong.
Regards,
Val
Regards,
Val
#12 Опубликовано: 06.06.2024 00:18:58
Of course. He is already forgotten.
Best regards.
Alvaro.
Best regards.
Alvaro.
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