Astrophysics (index)about

passive dust

(dust in a model that is influenced but does not influence)

Passive dust in a hydrodynamic model is dust simulated to see how it reacts to fluids and other forces, i.e., how it spreads and dissipates, but without simulating the effects of the dust on other phenomena. (Possibly the term might be used merely to say only one or two of its influences are included.) Using it can be an approximation, such as to get a handle on what might cause some observed characteristics, and/or it may be tried to investigate the actions simulated. Examples of where it might be used include simulations of nebulae, atmospheres, or disks such as protoplanetary disks.