A formulation is developed to apply the two-layer model to rough surfaces. The approach involves modifying the formula and the boundary condition on k. A hydrodynamic roughness length is introduced and related to the geometrical roughness through a calibration procedure. An experiment has been conducted to test the model. It provides data on flow over a ramp with and without surface roughness.
Rough Wall Modification of Two-Layer
Contributed by the Fluids Engineering Division for publication in the JOURNAL OF FLUIDS ENGINEERING. Manuscript received by the Fluids Engineering Division May 8, 2000; revised manuscript received November 17, 2000. Associate Editor: J. Lasheras.
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Durbin , P. A., Medic , G., Seo , J., Eaton , J. K., and Song, S. (November 17, 2000). "Rough Wall Modification of Two-Layer ." ASME. J. Fluids Eng. March 2001; 123(1): 16–21. https://doi.org/10.1115/1.1343086
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