I would like to locally increase the viscosity of a FLIP Fluid by proximity to a solid object.

Is there anything similar to the attribute transfer node that I could use in the DOP Network to locally change viscosity?

Where would I connect it in the network?

You could literally use an attribute transfer.

Throw down a sop solver and plug it into the second input on the flip solver (particle velocity)

In the sop solver the dop_geometry sop will import your particles at the current frame of the simulation. Just object merge in the geo you want to attribute transfer from, and use an attribute transfer to update the viscosity attribute on your particles.

Thank you, that worked out great.

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Lets say I want to increase Gravity/Bouancy if particles are close to some object. (also FLIP solver).

Lets say I create some attribute in SOP Solver and then, can I use this attribute per particle in Force node ?

I think the easiest way to do that would be to create a “force” in the sopsolver by adding to the particles' velocity or acceleration.

tas3d
let me join this thread with similar question

Lets say I want to increase Gravity/Bouancy if particles are close to some object. (also FLIP solver).

Lets say I create some attribute in SOP Solver and then, can I use this attribute per particle in Force node ?

Or else you can add to the velocity of the particle as a force would, inside the SOP solver.

You could convert your geometry into a Volume, create an offset to the volume, and use that Volume as a mask for any kind of field like gravity. That should do the trick with particles, FLIP Fluids and Fluids.