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Error: GENERAL CAR CDR - User-Defined-Material-Database

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Old   December 21, 2020, 08:01
Post Error: GENERAL CAR CDR - User-Defined-Material-Database
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Eva Knahl
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I would like to create two fabrics using the User Defined Material Database in Fluent.
I am working with Ansys 2020 R1 or R2 (both in use - files do not mix).
For this I used the following procedure:


User defined Material database in FLUENT


I created an empty Scheme file and edited it with Fluent.
There I set constant values for the acentric factor and the kiritic point. For cp, density, thermal conductivity and viscosity I want piecwise polynomial (3 rank with 3 coefficients).
I had also tried polyinomial with 7 coefficients....

I get the same error every time:
Error: GENERAL-CAR-CDR: invalid argument [1]: improper list

This error appears every time when starting the calculation and very often already when copying from the User-Defined-Material-Database.

I have also tried the following way.
user defined new material

But for this I copied the materials from the Scheme file. This leads to the fact that the substances appear in the Fluent-Database, but this leads to the same error when I want to copy/create the substances.

Is it possibly due to the piecewise polynomial assignment?
Have I ignored a step or am I forgetting something in the schema file?



(e_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))
(latent-heat)
(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))
)

(e-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))
)
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