[nimasam]

im going to modeling a two phase-flow which is heated along pipe, my boundary is cyclic in U and alpha but not in p and T so im going to use following boundary

.............wall..................
inlet outlet
.............axis..................

i would like to direct map of outlet into inlet for alpha and U,

alpha:


inlet
{
type directMapped;
value uniform 0;
setAverage false;
average 0;

}

outlet
{
type zeroGradient;
}

U:

inlet
{
type directMapped;
value uniform (0 0 1);
setAverage true;
average (0 0 1);
}

outlet
{
type zeroGradient;
}
p:
inlet
{
type zeroGradient;
}

outlet
{
type fixedValue;
value uniform 0;
}
T:

inlet
{
type fixedValue;
value uniform 0 ;
}

outlet
{
type zeroGradient;

}

are my boundaries corrects ?
whats the meaning of value,setAverage, and average?
what should be those values for direct map of outlet value into inlet value i want something exactly like cyclic boundary condition for U and alpha?


P.S: i used changeDictionary Dict like below

dictionaryReplacement
{
boundary
{
inlet
{
type directMappedPatch;
offset ( 0 0 4e-5 );
samplePatch outlet;
}
}
}