[Maffei]

Hello everyone!

It is the second time that I have posted something on this forum, so, if I doing anything wrong, sorry. That said, lets to my question:

I am trying to simulate an incompressible jet pump. The boundary conditions was setup as normal velocity equal 1 m/s at secondary and primary inlets. At the outlet, it was used the outlet-pressure with reference pressure equal to zero and the wall with no slip conditions. The turbulence model used was the RNG k-epsilon. The mesh was built in the ICEM CFD using the structured type (finer elements was positioned near the walls).

I am using the SIMPLE solver with:

Gradient -> Green Gauss node based
Pressure -> Linear
Momentum, and tubulenty properties -> First order
URF -> fluent standard

I already try a lot of configuration, but I cannot avoid the behavior that is shown in the figure 1, thus, the residuals do not decrease. Way is it happen?

Fig1 -> Velocity field with the error highlighted with red line
Fig2 -> Mesh detail 1 at this region
Fig3 -> Mesh detail 2 at the region

[acalado]

what are the residuals showing?

Is that first plot velocity or residuals? looks like velocity to me...