Merger of three parallel pipe flows (same speed) at medium Reynolds number

Merger of three parallel pipe flows into a channel at medium Reynolds number. The inflows through the inlets have the same parabolic profile. The resulting flow is nonsteady and still axisymmetric for some time before all symmetry is broken. This simulation has to be compared with the similar ones in the Album, including lower Reynolds numbers and different types of inflows.

• Distribution of temperature/concentration via Boussinesq model
  
  

  Visualization via tracing of concentration, starting from the inlet, shaded (first and second as a zoom, 2.3 and 2.4 MB) and via isolines (third, 6.8 MB). 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 pressure plots, shaded (first, 1.7 MB) and via isolines (second and third, as zoom, 5.8 MB and 3.1 MB).
  

  
  

  
  

  
  
  

• Streamfunction
  
  

  Visualization via streamline plots, shaded (first, 1.8 MB) and via isolines (second and third, as zoom, 2.4 MB and 3.4 MB).
  

  
  

  
  

  
  
  

• Velocity
  
  

  Visualization via vector plots (vectors, 2.6 MB) in a zoomed region.