Channel flow with two bumps at medium Reynolds number (nonsymmetric location)

Channel flow with two narrowing sections at Re=10,000, starting from rest. Both bumps are at different locations. The height of the lower hill is 0.35, while the upper one has heigth 0.25. The flow shows a complex, but nevertheless "quasi-periodical" behaviour.

• Distribution of temperature/concentration via Boussinesq model
  
  

  Visualization via distribution of the concentration in the flow field, starting from the inlet, but with different color maps (first, shaded, 1.8 MB, second, shaded, 2.6 MB).
  

  
  
  
  
  
  
  

• Pressure
  
  

  Visualization via pressure plots, shaded (first, 1.6 MB) and via isolines (second, 5.7 MB).
  

  
  
  
  
  
  
  

• Streamfunction
  
  

  Visualization via streamline plots, shaded (first, 1.9 MB) and via isolines (second, 6.3 MB).
  

  
  
  
  
  
  
  

• Velocity
  
  

  Visualization via vector plots (15.3 MB).