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Characteristics of turbulence of the bottom region of a flow

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Hydrotechnical Construction Aims and scope

Conclusions

  1. 1.

    The logarithmic formula of the distribution of the mean longitudinal velocities of water over the depth of a flow with a rough bottom was confirmed and refined in the bottom region.

  2. 2.

    The mean velocity at the level of the tips of roughness projections depends on the friction velocity u* and ratio H/dav.

  3. 3.

    The distance from the bottom δ where the distribution of the standard deviation of the longitudinal velocity fluctuations has a local maximum near the bottom depends on Fr*= u* 2/gH.

  4. 4.

    The distribution of the standard deviation of the longitudinal velocity fluctuations over the depth of the flow in the region from the bottom to δ has a power form and depends on u* and Fr*.

  5. 5.

    The values of the standard deviation of the longitudinal velocity fluctuations at the level of the tips of the roughness projections and at level δ depends on u* and Fr*.

  6. 6.

    The distribution of the Strouhal numbers over the depth of the flow in the region from the bottom to 2δ has a power form and depends on the Froude number Fr=v2/gH.

  7. 7.

    The value of the Strouhal number at the level of the tips of the roughness projections depends on Fr*=u* 2/gH and Fr=v2/gH (13) and its value at level 2δ depends only on the Froude number Fr=v2/gH.

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Authors
  1. A. Yu. Kuz'minov
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  2. D. V. Shterenlikht
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Translated from Gidrotekhnicheskoe Stroitel'stvo, No. 10, pp. 22–24, October, 1986.

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Kuz'minov, A.Y., Shterenlikht, D.V. Characteristics of turbulence of the bottom region of a flow. Hydrotechnical Construction 20, 580–585 (1986). https://doi.org/10.1007/BF01427244

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