[philippose]

Hello,
I am simulating flow of oil through a valve using icoFoam. The mesh consists of roughly 250,000 elements, and the points are defined in millimeter. It was created by importing an STL file from Pro-E into Netgen...meshing it, and then converting it using netgenNeutralToFoam.

While setting up the simulation, I used the utility function: transformPoints to scale the entire mesh by a factor of 0.001 in all the three axes, in order to convert it to metre.

In icoFoam I used a "Pressure Inlet" patch type at the Inlet side, and a "Pressure Inlet Outlet" patch type on the Outlet side, with all other boundaries defined as a wall.

The simulation was carried out with a time-step of 1.0e-07, with inlet pressure (600000/870), outlet pressure 0.0, and velocities being all zero.

When looking at the pressure and velocity distribution using ParaView, I found that for a delta P of 6 bar (fluid density 870 kg/m³), though the theoretical velocity at steady state should be around 37m/s, the velocities recorded, are scaled down by a factor of 1000 (I see around 0.0300 in ParaView).

The dimension specified in the "U" file for each time step says [0 1 -1 0 0 0 0].

Is this normal? Or have I made a mistake somewhere while defining the simulation?

Thank you,

Philippose