OS: Windows 10 (10.0)
Word size of OS: 64-bit
Word size of FreeCAD: 64-bit
Version: 0.19.23074 (Git)
Build type: Release
Branch: master
Hash: 74b866ed3022fd1452c534dae31a721bcc668f2f
Python version: 3.6.8
Qt version: 5.12.1
Coin version: 4.0.0a
OCC version: 7.3.0
Locale: German/Switzerland (de_CH)
Hi,
I have a interesting behaviour of the residuals when simulating my case. (File attached). In the first run I defined the velocity at the nozzle inlets and the pressure at the outlet. The residuals of al parameters did a smooth decend down to 10-4 / 10-5.
In the actual case I just switched the boundary conditions; means pressure at the nozzle inlets and velocity at the outlet. In this particular case the residuals did decend first but then climb again to 10-2 and stayed stable this size. (residuals attached)
Nothing else was changed. (geometry, grid, initial conditions etc.)
Can somebody tell me why this happens ?
Thx
Flow in cleaning tank_modified boundaries.FCStd (280 KB)