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Poiseuille flow - wrong velocity

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Old   June 19, 2015, 04:46
Default Poiseuille flow - wrong velocity
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Kathrin Burckhardt
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Hello,

I'm trying to simulate Poiseuille flow in a standard pipe (length 0.05m, radius 0.0025m, pressure drop 2.56 Pa, viscosity 0.001, density 1000), but I get a wrong velocity profile. The maximal velocity should be at 0.080m/s, but I get a maximum of 0.06m/s.
Can somebody please confirm that the following set-up is correct:

file ../0/p:
inlet
{
type fixedValue;
value uniform 0.00256;
}
outlet
{
type fixedValue;
value uniform 0.0;
}
wall
{
type zeroGradient;
}

file ../0/U:
inlet
{
type pressureInletVelocity;
phi phi;
rho rho;
value uniform (0 0 0);
}
outlet
{
type zeroGradient;
}
wall
{
type fixedValue;
value uniform (0 0 0);
}


Thanks a lot in advance!
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