Hey Bill,

i'm not sure about your problem, but i'll give it a look when i'm back at work tomorrow. What i can tell you now, is that you are missing two " ; " in your createFields.H. One at the end of the "dimensionedScalar nu" entry and one at the end of the "dimensionedVector F" entry. In my experience OpenFOAM is very sensitive to these kinds of mistakes. Given that there is an semicolon after the "dimensionedScalar Re" entry, i guess OF is expecting one after the aforementioned entries.

Greetings

Robert

Dear Robert,

Thank you so much. That was quite a stupid mistake.

However, after I added two semicolons according to your suggestions, the same error still shows.

I have seen that for the version 1.6.x, it seems that someone has successfully turned off the dimension checking, after setting the dimensionSet  from 1 to 0.  This has been indicated at https://openfoamwiki.net/index.php/Main_FAQ#How_does_one_turn_off_the_dimensional_checking.3F

While, bad luck, the procedure is not for me. I wonder how to change that for the version 3.0.1

Thank you for your kind help.

Cheers,

Bill

Hello Bill,

i haven't used dimensionless values my self before. But as a quick idea: If you set to "dimensions" entry for your parameters in the /case/0/ folder to "dimensions [0 0 0 0 0 0 0];" doesn't that get you dimensionless values?

/edit1:

I've found a older case where i have generated a yPlus entry in my /0/ folder. Reads as follows:

---------------------------------------------------------------------------

FoamFile

{

version 2.0;

format ascii;

class volScalarField;

location "0";

object yPlus;

}

// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //

dimensions [0 0 0 0 0 0 0];

internalField uniform 0;

---------------------------------------------------------------------------

With all entries being cyclic or calculated. But yPlus is dimensionless by definition and comes with "dimensions [0 0 0 0 0 0 0];"

/edit2:

Take a look at http://cfd.direct/openfoam/user-guide/basic-file-format/ specifically "4.2.6 Dimensional units". Maybe that helps if the above mentioned fails.

Dear Robert,

I did set the values in 0/constant as can be seen in the attachment for p and U.

The full folder is also attached in order to have a check.

I have checked the user_guide, still got no clue.

Thank you for the help.

Regards,

Bill

You can switch off the dimension checking at run-time by setting

dimensionSet 0;

in etc/controlDict

Dear Dr. Bohorquez,

I have copied the /etc/controlDict out to my case folder and set the dimensionSet to 0. In the original file of controlDict, I have no permission to change it.

But it still checks the dimensions.

The errors are:

\*--------------------------------------------------------------------------------------------------*/

Build : 3.0.1-d8a290b55d28

Exec : myIcoFoam

Date: Dec 10 2016

Time: 17:53:57

Host:

PID:

Case:

nPorcs: 1

sigFpe: Enabling floating point exception trapping (FOAM_SIGFPE).

fileModificationChcking: Monitoring run-time modified files using timeStampMaster

allowSystemOperation : Allowing user-supplied system call operations

//**************************************************************************************************//

Create Time

Create mesh for time=0

PISO: Operating solver in PISO mode

Reading transportProperties

-->FOAM FATAL IO ERROR:

The dimensions [0 0 0 0 0 0 0] provided do not match the required dimensions [0 2 -1 0 0 0 0]

file: /home/LEPT/ywang/OpenFOAM/ywang-3.0.1/run/circle/Re6000/constant/transportProperties.nu at line 20.

From function dimensioned::dimensioned(const word&,const dimensionSet&, Istream&)

in file /usr/local/OpenFOAM/OpenFOAM-3.0./src/OpenFOAM/lnInclude/dimensionedType.C at line 62.

FOAM aborting

#0 Foam::error::printStack(Foam::Ostream&) at ??:?

# Foam::IOerror::abort() at ??:?

#2 ? at ??:?

#3 ? at ??:?

#4 __libc_start_main in "/lib/x86_64-linux-gnu/libc.so.6"

#5 ? at ??:?

Aborted

And what do you mean by "at run-time"?

Hoping to hear from you.

Thank you in advance.

Best Regards,

Bill

If OpenFOAM is installed as superuser (e.g. in /opt/openfoam), you need to edit the file as superuser. (Obviously, do not copy the file to your case folder). You will find more information in the OpenFOAM forum.

Thank you for the instruction.

I can only remote the server, with no permission to edit the file.

Is there any solution for this situation?

Thank you.

Yes. You can make a local installation of OpenFoam in your home directory.

Thank you, Patricio.

I will try and update the information here.

 Dear Mr. Wang,

Have you solved your problem with solver? If yes, could you share it? I am working on similar problem.

on CFD-forum i saw some hint to solve the dimensionless equations:

" You need to do some modification on the solver, e.g., change nu to 1/Re, change kappa to Pr, etc. The equations have very similar form the only different is the coefficient, so it can be done without large modification.

Do not change the unit of variables! "

so... that's all. How make this modifications there are no recommendations.