it's much faster to use Gas Particle To Field DOP if you just want to transfer velocity from points like that
or Field Force DOP to make it act as a force since you are adding it anyway instead of just blending/replacing
but in general anything that can modify fields can change velocity, there is plenty of nodes/methods for that, it really depends on usage, use simple and fast ones like Gas Linear Combination, Gas Calculate, Gas Particle To Field for basic transfer and calculations and more expensive ones like Gas Field VOP and Sop Solver for more complex math
on top of that very quick way is to just check use point/volume/rigid velocity for colisions/sources directly on smoke solver which will take care of basic velocity transfer from them
Yes, but Gas Particle TO Field needs decent amount of particle in some case which it does not reach to the voxel that it have to do the calculation for vel or whatever field. You can increase the radius of search but sometimes, vector type volume convert from less point amount and use it in Gas Field VOP for more complex calculation or Gas Caculate or Linear Combination for simple calculation would do the job faster.
In some cases, sim with lots of voxel data compare to the scene scale, large amount of particle may take the sim really slow.
What my question was mainly about not technically getting the vel data to dop vel but what kind of method out there for object velocity implementation for emit source but thanks all for attention!