The Dissipated Particle Heat node is available when the
Compute particle temperature check box is selected in the physics interface
Additional Variables section.
The Dissipated Particle Heat node does not have any inputs, except to specify a domain selection. This feature defines an accumulated variable on the selected domains. It computes a volumetric heat sink if the particles are being heated by their surroundings, or a volumetric heat source if the particles are being cooled by their surroundings. In other words, the purpose of this node is to compute the heat lost or gained by the surrounding fluid as it heats or cools the particles.
This feature accumulates the heat gained or lost by the fluid due to any Convective Heat Losses or
Radiative Heat Losses nodes in the Particle Tracing for Fluid Flow interface, but it does not take any contribution from
Heat Source nodes, because user-defined heat sources could in principle be derived from a different source than the surrounding fluid, such as radioactive decay or chemical reactions within the particles.
where intop1 is an integration coupling over all fluid domains. The expression
fpt.Tp-at(0,fpt.Tp) means the difference between the current value of the particle temperature and its initial value.