[anon_q]

Hello,
If I have access to a volScalarField object, or volVectorField object. How can I access to its dictionary to read some inputs?

For example, if I have access to the velocity field U object, how can I lookup for an input from the dictionary 0/U?

Regards

[vivek05]

Hi,
volVectorField U
(
IOobject
(
"U",
runTime.timeName(),
mesh,
IOobject::MUST_READ,
IOobject::AUTO_WRITE
),
mesh
);

I hope You are expecting the same like above lines.

[anon_q]

Originally Posted by vivek05

Hi,
volVectorField U
(
IOobject
(
"U",
runTime.timeName(),
mesh,
IOobject::MUST_READ,
IOobject::AUTO_WRITE
),
mesh
);

I hope You are expecting the same like above lines.

Sorry, that is not what I am asking. You just declared a volVectorField. I am not asking for that I am looking how to get a reference to the dictionary object given a volScalarField (or volVectorField).

[olesen]

Originally Posted by Evren Linda

Hello,
If I have access to a volScalarField object, or volVectorField object. How can I access to its dictionary to read some inputs?

For example, if I have access to the velocity field U object, how can I lookup for an input from the dictionary 0/U?

Regards

It doesn't work like that. You can start with a file that is more or less in dictionary format, and use that to create the fields. After this has happened, the dictionary input has no mean and also cannot be accessible. If, for example, you imagine creating a volScalarField from some other calculation, there simply is no dictionary correspondence.


Depending on what you really need, you could go back to searching for the file on disk and read if from there. Can see why you'd want any of that though. If you have the volField, you have direct access to its contents and all of its boundary values. The only place where I might imagine wishing to have a dictionary would be if you are trying to stream off to some other external application. Could use a OListStream and then the writeEntries() methods on the boundary fields.


/mark

[anon_q]

hello Mark,
Thank you for your reply.
Actually, I need to access to some custom variables in the file 0/U but I have only a reference to the volVectorField U.

[olesen]

Originally Posted by Evren Linda

hello Mark,
Thank you for your reply.
Actually, I need to access to some custom variables in the file 0/U but I have only a reference to the volVectorField U.

Just use an IOdictionary to read them in for name "U" and time 0 in that case, but make certain to have the IOobject unregistered to avoid any name collisions with your field.

[api]

I created a custom list of scalar (powertime) and list of vector (powerVectime) in my thermophysicalProperties.air file and I could access the entries using the following command in my fvOptions.


List<scalar> my_myList = mesh().lookupObject<IOdictionary>("thermophysicalP roperties.air").lookup("powertime");
List<vector> my_vec = mesh().lookupObject<IOdictionary>("thermophysicalP roperties.air").lookup("powerVectime");

I have not tried accessing U fields , but may be we can try this way and see if it works. Hope this helps..