[zhangxc0223]

I know it can use functions with "libutilityFunctionObjects.so" in controlDict to control the writeInterval to some specific fields. For example the following code is for only writting the T.air' and 'U.air' fields every 1e-5 seconds.

functions
{
    writeFields
    {
        type writeObjects;
        libs ( "libutilityFunctionObjects.so" );
 
        objects
        (
	    T.air U.air 
        );

        writeControl runTime;
        writeInterval 1e-5;
    }
}

I would like to know how can I control the writeInterval for Lagrangian particles, like the 'U' and 'positions' fields?

[jairoandres]

Did you find any solution? I am stuck in the same.

[jairoandres]

Well, I think I rushed to the forum without spending a good time trying to fix it. Here is the solution:

When you use a Lagrangian field inside the "objects", it cannot find it in the database as they are stored inside the kinematicCloud object. Hence if you do the following:

objects
(
kinematicCloud // list of fields/variables to be written
);

It will save all the objects inside kinematicCloud (all the Lagrangian objects).

To save specific Lagrangian objects, such as Nparticle, I guess you need to access the information inside kinematicCloud