[seju]

Dear foamer
I want use this code for calculate droplet velocity but I dont kwon any thing.I dont know I must how use it?
its:

downAverage
{
type swakExpression;
valueType internalField;
variables (
"downDirection=vector(0,-1,0);"//select the downwards direction
"thres=0.5;"//which cells to keep
"liquidVol=sum(alpha1>thres ? vol() : 0);" //calculates the volume of the drop
"downVel=alpha1>thres ? (U & downDirection) : 0;" //a & b:inner vector product. Keep the y component of U. );
expression "downVel*vol()/liquidVol" //vol():vol of the cell
accumulations ( sum ); verbose true;
}


please help me. I dont know any thing about use swak4Foam,I just found this code in wiki.
http://www.openfoamwiki.net/index.ph...ropletVelocity