[gxuxg]

HI FOAMers,
For lagrangian particle tracking, the current practice is to set constant initial velocities for all particles released in space. The setting is defined for U0 in the file 'constant/kinematicCloudProperties'. In my test case, the initial velocities are supposed to be varied in space, dependent on the locations.
Could you please kindly share your tricks or tips how to define various initial particle velocities? FYI, I am using OF v2012.

Thanks for your help and sharing.

[dscian]

Depending on which Injection Model you use, you can make a specific code modification in the source code to inject particles with different velocities. For example, in PatchInjection.C, velocities are initialized in function setProperties.

this->owner() gives you access to the cloud.
this->owner().mesh() will give you the access to the mesh.
parcel.position() will give you the parcel position.
You can also access the particle's cell ID by parcel.cell(), and so on.

Then you can create a velocity distribution as a function of space.

[rqli_npu]

hello
I want to set the initial velocity of particles as the local velocity of flow field, using interpolation method, but I am not familiar with its source code, could you explain how to do it in detail, or do you have any examples that can be uploaded

[jinmingyu]

Originally Posted by rqli_npu

hello
I want to set the initial velocity of particles as the local velocity of flow field, using interpolation method, but I am not familiar with its source code, could you explain how to do it in detail, or do you have any examples that can be uploaded

hello,please tell me if you solved the problem