dissipation_influence

The dissipation influence will move a defined property toward a background value at a specified decay rate.

To use this node, plug its output into the influences input of a simulate node like simulate_aero, simulate_particles, or simulate_mpm.

Inputs

influence

One may optionally connect an influence field out_influence into this port. For example a mask_influence node could be connected to mask the effect of this influence. Any number of influence fields may be added to the daisy chain to build a complex field.

enable

Turn off to disable the effect. Disabling makes it a pass through node. Note that any other influence fields connected to the influence input port will still be active when this is disabled.

rate

This determines how fast the property decays toward the background value. There is no effect if the value is zero. The rate is a geometric decay, so the background value would only be exactly reached if the rate were infinite. You can connect a ScalarField to vary the effect over space.

property

This is the geo property on the simulation object to modify.

background_value

This is the target value that the dissipation moves towards. For an aero property like voxel_density 0.0 is usually a good value, so that gradually density will diminish over time. For voxel_temperature one may wish to use the value of the ambient background temperature, which is 20.0.

Outputs

out_influence

An output influence object that one can connect to simulation nodes or other influence nodes.