Simulation of Bar Screens

What are the benefits of hydrograv simulations?

  • Ensuring an equally distributed inflow to each bar screen
  • Prevention of depositions in the up and downstream area

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Example 1: Calibration by measurements

  • Calibration of the modelling approaches including the degree of debris by measuring the water levels
  • Comparison at different discharges

Figure:   Test of different model-like opening widths of the bar screen to model hydraulic losses realistically.

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Example 2: Determination and optimization of the distribution of waste water substances

  • Status quo: unequal distribution of substances even though both bar screens receive the same hydraulic loading
  • The distributary channel  is higher loaded with substances

Recommendation with simulation:

  • A separation baffle leads to a different distribution of the currents which improves the distribution of waste water substances

Figure:   Optimization of bar screen inflow. Analysis of the distribution of organic particle with different settling velocities.

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Example 3: Verification and optimization of depositions

Figure:   Verification of areas with depositions and analysis of the distribution of particles within a comparison of different variants.

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Example 4: Simulation of a Center Flow Screen

  • Model representation and optimization of the in- and outflow of a Center Flow Screen

Figure:   Modelling of a Center Flow Sreen. Illustraton of water velocities close to the bottom.