Merger of three parallel pipe flows into a channel at different Reynolds numbers

Merger of three parallel pipe flows into a channel at different Reynolds numbers and different inflows. The inflows through the left inlets have the same parabolic profile for the first (low Reynolds number) and second configuration (medium Reynolds number) while in the third and fourth configuration (medium Reynolds number) the inflow speed in the pipes varies. The resulting flow ranges from steady up to nonsteady and axisymmetric and even up to completely nonsymmetric. Even more configurations can be found in the `Virtual Album' which contains a configuration with additional perpendicular inflows through the small upper and lower inlets!

The corresponding coarse mesh for all simulations is plotted in the following diagram.

For a detailed description of the simulated flow configurations look at the corresponding pages in the `Virtual Album'.

• Distribution of temperature/concentration via Boussinesq model
  
  

  Visualization via tracing of concentration, starting from the left inlets. The last row shows the flow in a zoomed region for the medium ranged Reynolds number calculations (we omit the first column of low Reynolds number calculation!). The color red means `value of concentration +1' while blue stands for 'value of concentration -1'. Consequently, the green regions represent the mixed zones (concentration almost zero!).
  

  
  

  
  

  
  

  
  
  

  
  
  

• Pressure
  
  

  Visualization via shaded pressure plots and via isolines in a zoomed region. Again, we omit the first column of the low Reynolds number calculation in the last row for showing the zoomed regions.
  

  
  

  
  

  
  

  
  
  

  
  
  

• Streamfunction
  
  

  Visualization via shaded streamline plots and via isolines in a zoomed region. Again, we omit the first column of the low Reynolds number calculation in the last row for showing the zoomed regions.
  

  
  

  
  

  
  

  
  

  
  
  

• Velocity
  
  

  Visualization via vector plots in a zoomed region.