Determination of friction factor for corrugated drains

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  author =       "Orazio Giustolisi and Angelo Doglioni and 
                 Daniele Laucelli",
  title =        "Determination of friction factor for corrugated
  journal =      "Proceedings of the ICE - Water Management",
  year =         "2008",
  volume =       "161",
  number =       "1",
  pages =        "31--42",
  month =        "1 " # feb,
  keywords =     "genetic algorithms, genetic programming, hydraulics,
                 hydrodynamics, sewers, drains",
  ISSN =         "1741-7589",
  DOI =          "doi:10.1680/wama.2008.161.1.31",
  size =         "12 pages",
  abstract =     "This paper describes two approaches for evaluating the
                 resistance factor of corrugated drains. The first
                 employs a monomial formula and is based on dimensional
                 analysis while the second uses a physically based
                 formula that incorporates the relationships among
                 hydraulic parameters measured for a set of corrugated
                 pipes. The latter depends on an evolutionary modelling
                 technique that renders a superior description of the
                 hydraulics of the tested corrugated pipes,
                 outperforming the classical monomial formula for rough
                 pipes. The formulae derived herein accurately reproduce
                 experimental data and highlight the influence of
                 dimensionless factors on roughness values. Three
                 differently sized corrugated plastic pipes with slopes
                 ranging between 3.5percent and 17.5percent were
                 considered. The tests were directed at measuring open
                 channel flow hydraulic parameters in order to ascertain
                 the role of friction factors when wake interference
                 occurs. This hydro dynamic phenomenon, observed in the
                 tested pipes, is situated in the rough fully turbulent
                 flow region of the Moody diagram. From a technical
                 standpoint, wake interference is interesting because
                 the abnormal turbulence experienced along the channel's
                 wall-roughness elements generates additional energy
                 dissipation, entailing potentially significant
                 implications for sewer networks installed on steep
  notes =        "Orazio Giustolisi Professor, Engineering Faculty of
                 Taranto, Technical University of Bari, Italy Angelo
                 Doglioni Post-doctoral Research Fellow, Engineering
                 Faculty of Taranto, Technical University of Bari, Italy
                 Daniele Laucelli Research Fellow, Engineering Faculty
                 of Taranto, Technical University of Bari,


Genetic Programming entries for Orazio Giustolisi Angelo Doglioni Daniele B Laucelli