The propagator of the unsteady Stokes equation is shown to be dominated by the solution of a purely diffusive equation, whose dispersion coefficient is the viscosity. Pressure plays an indirect role only, by creating instantaneously a steady velocity field which decays slowly in space. Viscosity appears to measure the temporal growth of the second moment of the unsteady Stokes propagator.
|Autori:||MAURI R; RUBINSTEIN J|
|Titolo:||On the Propagator of the Stokes Equation and a Dynamical Definition of Viscosity|
|Anno del prodotto:||1996|
|Digital Object Identifier (DOI):||10.1080/00986449608936526|
|Appare nelle tipologie:||1.1 Articolo in rivista|