Keulegan–Carpenter number

The Keulegan - Carpenter number ( symbol: KC, after Garbis Hvannes Keulegan ( 1890-1989 ) ) is a dimensionless parameter that is used in the description of flows in porous media. It marks the rise of the hydraulic resistance in oscillating currents compared to steady flows.

According to the Forchheimer 's law, the hydraulic resistance for steady flows is a quadratic function of the filter velocity; . In the case of an oscillating flow increases according to the Keulegan - Carpenter number

Where the individual symbols for the following sizes are available:

  • : The maximum amplitude of the flow rate,
  • : The period of the flow,
  • : The characteristic length of the use case.
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