[jonfah]

Hi, Im trying to calculate the temperature in Celsius by using the postProcess utility. In previous version (OF22x) it was straight forward with the foamCalc utility to simply subtract 273 K from T to get Tdeg. I have tried different combinations with the postProcess utility e.g.

PHP Code:

postProcess -func "subtract(T,273.15,result=Tdeg)" -region fluid_Humidifier 


I get this error message:



--> FOAM FATAL IO ERROR:
wrong token type - expected word, found on line 4 the doubleScalar 273.15

file: /usrfem/femsys_local/OpenFOAM/OpenFOAM-6/etc/caseDicts/postProcessing/fields/subtract.fields at line 4.

From function Foam::Istream& Foam:perator>>(Foam::Istream&, Foam::word&)
in file primitives/strings/word/wordIO.C at line 74.



Does anyone know how to simply subtract a value from a field via the postProcess utility?
Additional info, I’m using OF6 in a multiregion case.

[tomf]

Hi,

I guess it would be fastest to make a field Tref with internalField and all boundaries at uniform 273.15 and than run as

postProcess -func "subtract(T,Tref,result=Tdeg)" -region fluid_Humidifier

Regards,
Tom

[jonfah]

Thanks Tom, it works perfect!