# GfsPhysicalParams

(Difference between revisions)
 Revision as of 04:04, 21 September 2007GeordieMcBain (Talk | contribs) (new page)← Previous diff Current revisionPopinet (Talk | contribs) Line 1: Line 1: - Use GfsPhysicalParams to set the gravitational field strength g (a number) and the specific volume (the reciprocal of density) alpha (a scalar field). + GfsPhysicalParams controls the following physical parameters + + { + L = NUMBER + g = NUMBER + alpha = [ [[GfsFunction]] ] + } - For example, from the [http://gfs.sourceforge.net/tests/tests/geo.html Geostrophic adjustment] test case + with - PhysicalParams { g = 9.4534734306584e-4 } + ;L: the size of a [[GfsBox]] (default is unity), + ;g: for the [[GfsOcean]] and [[GfsRiver]] solvers only, the strength of the gravitational field (default is unity), + ;alpha: for the [[GfsSimulation]] solver, the specific volume (i.e the inverse of density) (default is unity). - and from the [http://gfs.sourceforge.net/examples/examples/rt.html Rayleigh--Taylor] example + - + - VariableTracerVOF {} T + - InitFraction {} T (0.05*cos (2.*M_PI*x) + y) { ty = 0.5 } + - PhysicalParams { alpha = 1./(T*1.225 + (1. - T)*0.1694) } + - + - (here the fluid with characteristic function T has density 1.225 and the other fluid has density 0.1694). +

## Current revision

GfsPhysicalParams controls the following physical parameters

{
L = NUMBER
g = NUMBER
alpha = [ GfsFunction ]
}

with

L
the size of a GfsBox (default is unity),
g
for the GfsOcean and GfsRiver solvers only, the strength of the gravitational field (default is unity),
alpha
for the GfsSimulation solver, the specific volume (i.e the inverse of density) (default is unity).