LINK TO THE ORIGINAL PAGE  CACHED IMAGE 22/11/2007  SAFE FOOD PACKAGING PORTAL 
QSPRMS WEBSERVER
BETA VERSION, TO BE RELEASED VERY SOON (no extrahelp at this time)


INPUTS 
NAME  DESCRIPTION AND ADVICES 

_FA or _FB  compartments left and right respectively (their behaviors are symmetric) 
_Pi  layer i=1..n of plastics or polymer. Layer _P1 and _Pn are in contact with _FA and _FB respectively 
_FP  respectively to the whole P 
M  migrant/diffusant/permeant 
0  initial 
C  concentrations (units can be arbitrary) Concentrations can be by volume (all ρ=1) or by mass (in this case you need to assign correct ρ values) >>output concentrations have the same units as inputs 
Bi  mass Biot number (respectively to the layer with the highest resistance) = h·lref/Dref >>use Bi=0 to set an impervious boundary condition 
D  diffusion coefficients 
k =1/S  Henry coefficients (units can be arbitrary) Definition: p=k·C >>units of p and C must be chosen accordingly 
L  dilution coefficients (ratios of volumes or lengths) >>use very large (e.g. 1e8) L values =0 to set a Dirichlet boundary condition (i.e. constant concentration/pressure) 
p  partial pressure (units can be arbitrary) Definition: p=k·C >>units of p and C must be chosen accordingly 
ρ  relative densites (units can be arbitrary, must be set to 1 when you use volume concentrations) 
S =1/k  solubilities (units can be arbitrary) >>true units are only required when you need a true scale of pressure 
PARAMETER FORM 
©2007 by INRA\Olivier Vitrac