
Representation:
In spatial simulations
the physical quantities depend on position in space
and can be represented
by
fields  continuous distribution
(scalar, vector, tensor)
particles  discrete distribution
Transformation between the two representations:
distributed
particles >
particle
density function >
field f (r)
field
f (r) >
sampling
with density
f(r) >
particle representation
Processes:
process can be modeled as