# add decimals to coefficients of the polynomial function in a material property Fluent

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 May 21, 2014, 14:38 add decimals to coefficients of the polynomial function in a material property Fluent #1 New Member   Josue Fraire Join Date: Mar 2013 Location: Monterrey, Mexico Posts: 3 Rep Power: 11 I'm working with oil so dynamic viscosity is too low and the polynomial regression for this property use to have coefficients with more than 12 decimals in order to have a pretty low error in the viscosity calculation, so I set the material properties and enter the coefficients for the function and I save changes, but when I go back to the material property I realize it changes to 6 decimals. what can I do to keep more decimals for the coefficients? By the way, I'm using double precision simulation Thanks lazregenset likes this.

August 4, 2014, 07:05
halp
#2
New Member

lazreg
Join Date: Jul 2014
Posts: 9
Rep Power: 9
Quote:
 Originally Posted by Josue Fraire I'm working with oil so dynamic viscosity is too low and the polynomial regression for this property use to have coefficients with more than 12 decimals in order to have a pretty low error in the viscosity calculation, so I set the material properties and enter the coefficients for the function and I save changes, but when I go back to the material property I realize it changes to 6 decimals. what can I do to keep more decimals for the coefficients? By the way, I'm using double precision simulation Thanks

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 August 4, 2014, 10:37 #3 Senior Member   François Grégoire Join Date: Jan 2010 Location: Canada Posts: 392 Rep Power: 15 Josue: Materials... Create/Edit... User-Defined Database... Copy Materials From Case... then save the database file (.scm) somewhere. Open the database file in notepad and you will see the actual number of decimals of the polynomial coefficients. lazregenset:

August 4, 2014, 13:49
#4
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lazreg
Join Date: Jul 2014
Posts: 9
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Quote:
 Originally Posted by macfly Josue: Materials... Create/Edit... User-Defined Database... Copy Materials From Case... then save the database file (.scm) somewhere. Open the database file in notepad and you will see the actual number of decimals of the polynomial coefficients. lazregenset:

thanks thank you verri match

August 4, 2014, 14:03
thanks again
#5
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lazreg
Join Date: Jul 2014
Posts: 9
Rep Power: 9
Quote:
 Originally Posted by macfly Josue: Materials... Create/Edit... User-Defined Database... Copy Materials From Case... then save the database file (.scm) somewhere. Open the database file in notepad and you will see the actual number of decimals of the polynomial coefficients. lazregenset:

thanks again i'm very happy for him find people like you in my life thanks again

 October 2, 2014, 10:15 #6 New Member   Josue Fraire Join Date: Mar 2013 Location: Monterrey, Mexico Posts: 3 Rep Power: 11 I have already done that, but I realized that even if I add all necessary decimals for my regression in the notepad file, as soon as I open the property manager in fluent, the amount of decimals will be decreased. the max amount of decimals is 8, and I need 12

 Tags decimals, fluent, polynomial, properties, viscosity