Output files: not write Phi, U_0 and phi_0 as output

hambo · February 7, 2015, 12:39

How can I force Openfoam to do not write Phi, U_0 and phi_0 as output?

opedrofunk · February 7, 2015, 13:03

Change:

Code:

IOobject::AUTO_WRITE

to

Code:

IOobject::NO_WRITE

in the solver for the fields of interest (or disinterest, as the case may be). Recompile in your user directory and test.

alexeym · February 7, 2015, 15:41

Hi,

@opedrofunk: In general these fields come not from solver but from discretisation of time derivatives. So, modifiations of the solver in general will not help.

@hambo you can disable all output (setting outputInterval to rather large value, larger than endTime) and use writeRegisteredObject function object to write the fields of interest. Though, I guess, it can cause difficulties upon simulation restart.

hjasak · February 8, 2015, 03:59

You should not really do that. You are running second order in time and without second old-time fields (_0) you cannot do a precise restart.

Hrv

February 7, 2015, 12:39	Output files: not write Phi, U_0 and phi_0 as output	#1
hambo New Member hamid reza Join Date: Aug 2013 Posts: 4 Rep Power: 12	How can I force Openfoam to do not write Phi, U_0 and phi_0 as output?

February 7, 2015, 13:03		#2
opedrofunk Member Peter Join Date: Feb 2015 Location: New York Posts: 73 Rep Power: 11	Change: Code: IOobject::AUTO_WRITE to Code: IOobject::NO_WRITE in the solver for the fields of interest (or disinterest, as the case may be). Recompile in your user directory and test.

February 7, 2015, 15:41		#3
alexeym Senior Member Alexey Matveichev Join Date: Aug 2011 Location: Nancy, France Posts: 1,930 Rep Power: 38	Hi, @opedrofunk: In general these fields come not from solver but from discretisation of time derivatives. So, modifiations of the solver in general will not help. @hambo you can disable all output (setting outputInterval to rather large value, larger than endTime) and use writeRegisteredObject function object to write the fields of interest. Though, I guess, it can cause difficulties upon simulation restart. wyldckat likes this.

February 8, 2015, 03:59		#4
hjasak Senior Member Hrvoje Jasak Join Date: Mar 2009 Location: London, England Posts: 1,905 Rep Power: 33	You should not really do that. You are running second order in time and without second old-time fields (_0) you cannot do a precise restart. Hrv hgcastro and sharonyue like this. __________________ Hrvoje Jasak Providing commercial FOAM/OpenFOAM and CFD Consulting: http://wikki.co.uk