Reduced Ito particle: everything an ItoParticle carries that is not recomputed from the mesh. More...

#include <CD_ItoMergeParticle.H>

Public Attributes
ParticleReal	energy = 0.0
	Average particle energy – the only payload this particle carries.

Detailed Description

Reduced Ito particle: everything an ItoParticle carries that is not recomputed from the mesh.

This is the Ito particle representation for merging, and the holder the bulk particles ride across a regrid in. Position, weight and the particleID/rankID metadata are container-owned columns, so the payload is a single scalar – the average energy – and the whole particle is 53 B in 3-D against ItoParticle's 149 B.

Nothing else in ItoParticle needs to survive either operation. Its mobility, diffusion and velocity columns are interpolated from the mesh (interpolateMobilities()/interpolateDiffusion()/ interpolateVelocities()); its scratch columns are scratch; and old_x/y/z is rewritten wholesale at the top of every time step (ItoKMCGodunovStepper::setOldPositions()) and read back inside the same advance, so no regrid can land between the write and the read. The energy is the one genuine state candidate – it is read on a live path, ItoSolver::interpolateMobilities() feeding ItoSpecies::mobility(Real) – so it is carried, and dropping the rest is lossless.

Warning: The old_x/y/z argument above expires the day anything writes those columns outside ItoKMCGodunovStepper::advance(); ItoKMCStepper::computeEdotJSource() reads them and would be such a caller if it were ever wired up (it has no callers anywhere in the tree today).

The documentation for this struct was generated from the following file:

Source/ItoDiffusion/CD_ItoMergeParticle.H

Public Attributes

Detailed Description