OpenFOAM – AIR FLOW THROUGH A VENTILATED SUGAR BEET CLAMP. UPDATE

OpenFOAM – AIR FLOW THROUGH A VENTILATED SUGAR BEET CLAMP. UPDATE

In the first attempt at finding a solution to this model, the wrong kinematic viscosity was used. This permitted a solution to be found, but it was worthless. Once the correct kinematic viscosity for air was given, the steady state model would just diverge. The reason appears to be the simple fact that the model isn’t steady: there is turbulence in the system. With outlet velocities of 20 m/s, and a kinematic viscosity of 1.382 e-05, and I think a L of 0.06 m, Reynolds is 87 000. Yeah, turbulent.

The final result isn’t a lot different from the first attempt. I guess this is a result of the need for the fluid to leave the clamp system. In the naturally ventilated version, the fluid could just go around the clamp, which is what it chose to do when I had the wrong kinematic viscosity. Now, it can’t.

The contours are 0.02 m/s apart. This means that most of the clamp has a superficial velocity below 0.1 m/s (the same conclusion as the previous (wrong) attempt).

3D, along the middle of the clamp (z=1.5m). This clamp is 8m wide.
2D, showing some of the top (outlet) of the clamp, including where the ventilation pipe enters the clamp. 10cm this side of the ventilation pipe (z = 1.7m).

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