Diff and Coolprop - Сообщения
#1 Опубликовано: 27.01.2018 23:37:12
Hi. How can take the derivative or integral of a function involving coolprops?
Thanks in advance.
Alvaro.
Thanks in advance.
Alvaro.
#2 Опубликовано: 28.01.2018 06:41:06
Hello Alvaro,
I have the impression that numerical derivative and integration issues (especially with units) will be here on the Forum for ever
. I wish I was wrong.
The analytical attempts with Maple or Maxima will fail here. We are forced to use numerical solvers or functions here. Here is the solution (not straight forward though) only in SMath.
I tried Gradient.CD() from NumericalSolvers plugin, but I failed.
Regards,
Radovan
I have the impression that numerical derivative and integration issues (especially with units) will be here on the Forum for ever
. I wish I was wrong.The analytical attempts with Maple or Maxima will fail here. We are forced to use numerical solvers or functions here. Here is the solution (not straight forward though) only in SMath.
I tried Gradient.CD() from NumericalSolvers plugin, but I failed.
Regards,
Radovan
When Sisyphus climbed to the top of a hill, they said: "Wrong boulder!"
1 пользователям понравился этот пост
Alvaro Diaz Falconi 29.01.2018 10:30:00
#3 Опубликовано: 28.01.2018 07:11:32
Aside smath issues, you can use the coolprop derivatives syntax (units not handled here, wrapper stuff to check)
![2018-01-28 10_58_02-SMath Studio - [Page2_].png](/ru-RU/file/mWZ656/2018-01-28-10_58_02-SMath-Studio---_Page2___png)
If you like my plugins please consider to support the program buying a license; for personal contributions to me: paypal.me/dcprojects
2 пользователям понравился этот пост
#4 Опубликовано: 28.01.2018 09:44:11
Oh, thanks. I want to use coolprop and smath to show the basic thermodynamics equations, like
the dT dS relationships, etc. With nice notation (even have not partial derivatives) and, of course, units.
Any way. Another question ... there are a standard way to plot with log scale? I can try to write my own function, but first want to know that. In the attached, a classical problem solved in less than two sheets, with the help of SMath.
Best regards.
Alvaro.
Rankine Cycle with Reheat.sm
the dT dS relationships, etc. With nice notation (even have not partial derivatives) and, of course, units.
Any way. Another question ... there are a standard way to plot with log scale? I can try to write my own function, but first want to know that. In the attached, a classical problem solved in less than two sheets, with the help of SMath.
Best regards.
Alvaro.
Rankine Cycle with Reheat.sm
1 пользователям понравился этот пост
frapuano 28.01.2018 15:26:00
#5 Опубликовано: 29.01.2018 00:00:06
Oh, thanks. I want to use coolprop and smath to show the basic thermodynamics equations,
Hello Alvaro,
Physical water has two measurable properties [T,P].
Boiling drum operates @ saturation thus, measuring one gives the other one.
Here, it seems you are working compressed water [single phase].
It has 15 WASP properties ... how you call either one @ mystic from CoolProp.
Maybe, I don't understand the project.
Jean
Maths CoolProp_Props Copy.sm
1 пользователям понравился этот пост
Alvaro Diaz Falconi 29.01.2018 10:26:00
#6 Опубликовано: 29.01.2018 03:11:21
No comment ... just learn that fluid speed in piping
is no more m/s since century, rather Gy/K ... does is
run faster/slower/fly out of pipe/spits out $$$
is no more m/s since century, rather Gy/K ... does is
run faster/slower/fly out of pipe/spits out $$$
#7 Опубликовано: 29.01.2018 10:25:08
Here what can I do, but guess that not much more, at least without an equivalent of wolfram's Hold or maple's x::uneval. I don't see any other way for handle the case with 2 variables, i.e. h(s,v), u(T,P) etc and have a true readable implementation of classic thermodynamics.
Best regards.
Alvaro.
CoolPropDiff.sm
Best regards.
Alvaro.
CoolPropDiff.sm
#8 Опубликовано: 29.01.2018 10:29:04
Maybe, I don't understand the project.
Jean
Hi Jean. Good to read you. The "project" is just write the classical thermodynamics formulas and check them numerically, like
Best regards.
Alvaro.
#9 Опубликовано: 29.01.2018 15:34:25
Thanks Alvaro, saved
Very interesting stuff from http://www.katmarsoftware.com/
From Katmar, I use lot Uconeer [Unit Converter]
and WASP [Water & Steam Properties] ... 3 min free session, unlimited sessions.
See you, cheers ... Jean
Very interesting stuff from http://www.katmarsoftware.com/
From Katmar, I use lot Uconeer [Unit Converter]
and WASP [Water & Steam Properties] ... 3 min free session, unlimited sessions.
See you, cheers ... Jean
#10 Опубликовано: 29.01.2018 16:07:28
These two turned red in 6179, quite puzzling.
Are they red in your 6484 ? if YES => Oh !
Are they red in your 6484 ? if YES => Oh !
-
Новые сообщения
-
Нет новых сообщений