CFD Online Logo CFD Online URL
www.cfd-online.com
[Sponsors]
Home > Forums > Software User Forums > ANSYS > FLUENT

Add piecewise polinomial material property

Register Blogs Members List Search Today's Posts Mark Forums Read

Reply
 
LinkBack Thread Tools Search this Thread Display Modes
Old   December 21, 2020, 06:03
Question Add piecewise polinomial material property
  #1
New Member
 
Eva Knahl
Join Date: Dec 2020
Location: Germany
Posts: 5
Rep Power: 2
EvaKn is on a distinguished road
I want to add two aggregate states of a substance as a new substance in Fluent. So two materials - one gas phase and the other one liquid phase.



I used an empty Scheme file and loaded it in the User-Defined-Material-Database. Then I created a substance in which I set the ciritcal point parameters as constant and entered for cp, density, thermal conductivity and viscosity piecewise polynomial (3 Ranges with three coefficients).



Basically, the same error always occurs:

Error: GENERAL-CAR-CDR: invalid argmument[1]: improper list
Error Object () or Error Object #f


The problem also occurs when I try the following:

user defined new material


How can I fix this error?
My Scheme Code is:
(I know that the coefficients are not great - and I don't know why the real-gas-law is added)


(eth_g fluid
(chemical-formula . #f)
(acentric-factor (constant . 0.09950000000000001))
(specific-heat (polynomial piecewise-polynomial (289.79 295. 2730669. -18393.334733 31.015439) (295. 300.5 612790.6021 -3997.16224 6.55105) (300.5 306. 246111.7724 -1552.2795 2.4756244)) (real-gas-law . #f) (constant . 0.09950000000000001))
(critical-pressure (constant . 4872200.) (polynomial piecewise-polynomial (289.79 295. 2730669. -18393.334733 31.015439) (295. 300.5 612790.6021 -3997.16224 6.55105) (300.5 306. 246111.7724 -1552.2795 2.4756244)) (real-gas-law . #f))
(critical-volume (constant . 0.00485) (polynomial piecewise-polynomial (289.79 295. 2730669. -18393.334733 31.015439) (295. 300.5 612790.6021 -3997.16224 6.55105) (300.5 306. 246111.7724 -1552.2795 2.4756244)) (real-gas-law . #f))
(critical-temperature (constant . 305.32) (polynomial piecewise-polynomial (289.79 295. 2730669. -18393.334733 31.015439) (295. 300.5 612790.6021 -3997.16224 6.55105) (300.5 306. 246111.7724 -1552.2795 2.4756244)) (real-gas-law . #f))
(density (polynomial piecewise-polynomial (289.79 295. 7070.2037820704 -46.398193926 0.07683156694) (295. 300.5 2992.4518829 -18.701474026 0.029801199) (300.5 306. 1766.722568 -10.5323227 0.01618981)) (constant . 305.32) (real-gas-law . #f))
(molecular-weight (constant . 30.069) (polynomial piecewise-polynomial (289.79 295. 7070.2037820704 -46.398193926 0.07683156694) (295. 300.5 2992.4518829 -18.701474026 0.029801199) (300.5 306. 1766.722568 -10.5323227 0.01618981)) (real-gas-law . #f))
(reference-temperature (constant . 285.15) (polynomial piecewise-polynomial (289.79 295. 7070.2037820704 -46.398193926 0.07683156694) (295. 300.5 2992.4518829 -18.701474026 0.029801199) (300.5 306. 1766.722568 -10.5323227 0.01618981)) (real-gas-law . #f))
(speed-of-sound (constant . 230.13) (polynomial piecewise-polynomial (289.79 295. 0.00033736625857 -2.20486957e-06 3.722146e-09) (295. 300.5 0.0001359195 -8.365594405560001e-07 1.398601399e-09) (300.5 306. 7.03099060939e-05 -3.990819180817e-07 6.693306693000001e-10)) (polynomial piecewise-linear (0. . 0.) (0. . 0.)) (real-gas-law . #f))
(thermal-conductivity (constant . 0.02968) (polynomial piecewise-polynomial (289.79 295. 0.00033736625857 -2.20486957e-06 3.722146e-09) (295. 300.5 0.0001359195 -8.365594405560001e-07 1.398601399e-09) (300.5 306. 7.03099060939e-05 -3.990819180817e-07 6.693306693000001e-10)) (polynomial piecewise-linear (0. . 0.) (0. . 0.)) (real-gas-law . #f))
(viscosity (polynomial piecewise-polynomial (289.79 295. 0.00033736625857 -2.20486957e-06 3.722146e-09) (295. 300.5 0.0001359195 -8.365594405560001e-07 1.398601399e-09) (300.5 306. 7.03099060939e-05 -3.990819180817e-07 6.693306693000001e-10)) (polynomial piecewise-linear (0. . 0.) (0. . 0.)) (constant . 285.15) (real-gas-law . #f))
(therm-exp-coeff (constant . 0))
)

(eth-liq fluid
(chemical-formula . #f)
(acentric-factor (constant . 0.09950000000000001))
(specific-heat (polynomial piecewise-polynomial (270. 276.5 86021.53558 -643.444643 1.24863) (276.5 283. 217730. -1594.08283 2.964011) (283. 289.79 980190.171973 -6962.76209 12.41463)) (constant . 0.09950000000000001))
(critical-pressure (constant . 4872200.) (polynomial piecewise-polynomial (270. 276.5 86021.53558 -643.444643 1.24863) (276.5 283. 217730. -1594.08283 2.964011) (283. 289.79 980190.171973 -6962.76209 12.41463)))
(critical-volume (constant . 0.00485) (polynomial piecewise-polynomial (270. 276.5 86021.53558 -643.444643 1.24863) (276.5 283. 217730. -1594.08283 2.964011) (283. 289.79 980190.171973 -6962.76209 12.41463)))
(critical-temperature (constant . 305.32) (polynomial piecewise-polynomial (270. 276.5 86021.53558 -643.444643 1.24863) (276.5 283. 217730. -1594.08283 2.964011) (283. 289.79 980190.171973 -6962.76209 12.41463)))
(density)
(molecular-weight (constant . 30.069) (polynomial piecewise-polynomial (270. 276.5 86021.53558 -643.444643 1.24863) (276.5 283. 217730. -1594.08283 2.964011) (283. 289.79 980190.171973 -6962.76209 12.41463)))
(reference-temperature (constant . 285.15) (polynomial piecewise-polynomial (270. 276.5 86021.53558 -643.444643 1.24863) (276.5 283. 217730. -1594.08283 2.964011) (283. 289.79 980190.171973 -6962.76209 12.41463)))
(speed-of-sound (polynomial piecewise-polynomial (270. 276.5 -2074.136 30.09596 -0.07409341) (276.5 283. -6478.40365 61.9003 -0.131511) (283. 289.79 -22555.67871 175.191406 -0.331094)) (constant . 285.15))
(thermal-conductivity (polynomial piecewise-polynomial (270. 283. 0.150099526 0.000441038 -2.379121e-06) (283. 289.79 -0.4129611463008 0.004445709185 -9.500693223e-06)) (constant . 285.15))
(viscosity (polynomial piecewise-polynomial (270. 276.5 0.00022985144066 -3.5231099e-07 -9.780219999999999e-10) (276.5 283. -4.04156395605193e-05 1.5997178571434e-06 -4.5027472527e-09) (283. 289.79 -0.00095385194 8.037289999999999e-06 -1.5845286e-08)) (constant . 285.15))
)
EvaKn is offline   Reply With Quote

Reply

Tags
new material definition, piecewise polynomial, scheme file

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
How to delete or change material property in simFlow anraw OpenFOAM 1 August 30, 2016 07:09
UDF for MATERIAL PROPERTY Vivek.oswal FLUENT 0 July 27, 2016 04:48
Simple piston movement in cylinder- fluid models arun1994 CFX 4 July 8, 2016 02:54
How can I add new material? doctoryk STAR-CCM+ 2 May 11, 2010 15:13
How to add more material properties sarahsun CFX 1 October 27, 2009 07:27


All times are GMT -4. The time now is 17:29.