- author = "Orazio Giustolisi and Angelo Doglioni and Daniele Laucelli",
- title = "Determination of friction factor for corrugated drains",
- 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 slopes.",
-
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,
Italy
wama161-031.pdf",
