A quetion about function trunc()

killsecond · June 3, 2014, 05:29

Hi all,
In my turbulence model, I want to use the function trunc(), its' type is "double trunc(double)", something went wrong when I compiled.
Example:
Fblend_(F2()*max(scalar(1)-trunc(k_/Cblend_/omega_/nu()), scalar(0))),

and the error is:
error: cannot convert ‘Foam::tmp<Foam::GeometricField<double, Foam::fvPatchField, Foam::volMesh> >’ to ‘double’ for argument ‘1’ to ‘double trunc(double)’

I wonder that whether I can't use the "k_/Cblend_/omega_/nu()" in trunc() directly, because "k_/Cblend_/omega_/nu()" is flow field datas, which is not "double" type.

How can I solve this problem? Thank you!

jherb · June 28, 2014, 19:05

I am not sure, but nu() is a scalar with some dimensions whereas trunc wants an double as argument. Try nu().value()

June 3, 2014, 05:29	A quetion about function trunc()	#1
killsecond New Member Zhiwei Zheng Join Date: May 2014 Posts: 23 Rep Power: 12	Hi all, In my turbulence model, I want to use the function trunc(), its' type is "double trunc(double)", something went wrong when I compiled. Example: Fblend_(F2()*max(scalar(1)-trunc(k_/Cblend_/omega_/nu()), scalar(0))), and the error is: error: cannot convert ‘Foam::tmp<Foam::GeometricField<double, Foam::fvPatchField, Foam::volMesh> >’ to ‘double’ for argument ‘1’ to ‘double trunc(double)’ I wonder that whether I can't use the "k_/Cblend_/omega_/nu()" in trunc() directly, because "k_/Cblend_/omega_/nu()" is flow field datas, which is not "double" type. How can I solve this problem? Thank you!

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June 28, 2014, 19:05		#2
jherb Senior Member Joachim Herb Join Date: Sep 2010 Posts: 650 Rep Power: 21	I am not sure, but nu() is a scalar with some dimensions whereas trunc wants an double as argument. Try nu().value()