Fade-in fvOptions source

potentialFoam · January 6, 2016, 08:42

Dear Foamers,

I would like to fade in a custom-made source term during the progress of the simulation. The momentum source is introduced with a new fvOptions-class.

I tried the following (for simpleFoam first):
The variable 'time' gives the time of the simulation and the variable 'factor' should be used to fade in the source term (after the fvOptions is switched to active after 100 iterations).

Code:

const Time& time = mesh().time();
scalar factor = min( (time - 100)/10, 1);

The errors show a conflict between the data types 'Time' and 'scalar' and for the min-function.

Questions:
- 1) Is there a better approach?
- 2) Should I 'convert' the 'Time'-type to sth. else?

Regards,
Peter

fumiya · January 6, 2016, 10:07

Hi,

You might want to read the following thread regarding your question #2:
http://www.cfd-online.com/Forums/ope...me-scalar.html

Best regards,
Fumiya

potentialFoam · January 6, 2016, 10:14

Dear Fumiya,

Thanks a lot!!

January 6, 2016, 08:42	Fade-in fvOptions source	#1
potentialFoam Member Peter Join Date: Nov 2015 Location: Hamburg, Germany Posts: 57 Rep Power: 11	Dear Foamers, I would like to fade in a custom-made source term during the progress of the simulation. The momentum source is introduced with a new fvOptions-class. I tried the following (for simpleFoam first): The variable 'time' gives the time of the simulation and the variable 'factor' should be used to fade in the source term (after the fvOptions is switched to active after 100 iterations). Code: const Time& time = mesh().time(); scalar factor = min( (time - 100)/10, 1); The errors show a conflict between the data types 'Time' and 'scalar' and for the min-function. Questions: - 1) Is there a better approach? - 2) Should I 'convert' the 'Time'-type to sth. else? Regards, Peter

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January 6, 2016, 10:07		#2
fumiya Senior Member Fumiya Nozaki Join Date: Jun 2010 Location: Yokohama, Japan Posts: 266 Blog Entries: 1 Rep Power: 19	Hi, You might want to read the following thread regarding your question #2: http://www.cfd-online.com/Forums/ope...me-scalar.html Best regards, Fumiya potentialFoam likes this. __________________ [Personal] Blog: https://caefn.com/ Twitter: https://twitter.com/FumiyaNozaki SlideShare: http://www.slideshare.net/fumiyanozaki96

January 6, 2016, 10:14		#3
potentialFoam Member Peter Join Date: Nov 2015 Location: Hamburg, Germany Posts: 57 Rep Power: 11	Dear Fumiya, Thanks a lot!!