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Sewer sideweir with throttling pipe
(1999)Journal of Irrigation and Drainage EngineeringSewer sideweirs in a combined sewer system are used for diversion of excess discharge during rainfalls. Their hydraulic performance depends significantly on the approach Froude number, the relative weir height, and the overflow length. The throttling pipe is a simple device to limit the discharge to treatment facilities. An experimental work was conducted to establish the main flow features of the converging sewer sideweir. The effect of ...Journal Article -
Underflow of standard sluice gate
(1999)Experiments in FluidsGate flow is known to be subjected by scale effects. This experimental project adds to the understanding of effects of viscosity and surface tension. Minimum gate openings as a function of channel width are presented for water flow such that the Froude similarity law applies. Also, the upstream extension of the so-called Reynolds ridge is determined. Further, results are provided to the pressure distributions on the channel bottom and ...Journal Article -
Hydraulic jump in circular pipes
(1999)Canadian Journal of Civil EngineeringHydraulic jumps in conduits containing free surface flow have received practically no attention. This project was conducted to investigate experimentally the main features of such jumps and to obtain limits for conduit choking. The sequent depth ratio is determined in terms of the approach Froude number based on the conventional momentum approach. The lengths of the surface recirculation and aeration zones are also considered. Two different ...Journal Article -
Cavity outflow from a nearly horizontal pipe
(1999)International Journal of Multiphase FlowOutflow from a circular pipe is considered for cavity flow. The cavity geometry, the end depth and the jet trajectories are described, in terms of the pipe Froude number. This is an extension of previous work for pipes sufficiently large such that effects of viscosity and surface tension can be neglected.Journal Article -
Irrotational flow and real fluid effects under planar sluice gates
(1999)Journal of Hydraulic EngineeringOther Journal Item -
Schiessender Abfluss in Krümmerschächten
(1999)KA: Korrespondenz Abwasser AbfallDie Hydraulik von Krümmerschächten bei schiessendem Zufluss wird vorgestellt. Einerseits wird die Abflussstruktur für sogenannt unverbaute schächte ermittelt, d.h. insbesondere die Durchflusskapazität, die Wellenbildung und der Unterwasserbereich. Andererseits wird die sogenannte Deckplatte als konstruktives Element zur Kapazitätserhöhung vorgeschlagen. Die Untersuchung erlaubt eine unmittelbare Bemessung von Krümmerschächten, die mit ...Journal Article -
Studying flow at tunnel bends
(1999)The International Journal on Hydropower & DamsThe characteristic flow features of 45° bends in a circular profile conduit are determined. The experimental research project introduces the choking number that significantly controls supercritical bend flow. The results obtained are readily applicable for designing new or checking existing bottom outlets with an angle of deviation close to 45°. It is found out that so-called cover plates do not improve bend flow, and that bends can be ...Journal Article -
Plunge pool scour: Early history and hydraulicians
(1998)Journal of Hydraulic EngineeringJournal Article -
Generalized culvert design diagram
(1998)Journal of Irrigation and Drainage EngineeringThe features of culvert flow in a basic arrangement are highlighted. Four fundamental flow types may be identified, namely critical flow, uniform flow, gated flow, and pressurized flow. A generalized design diagram is presented for the circular barrel that gives the possible transitions between various flow types. Further, the lengths of free surface flows with a central pressurized flow portion are determined as a function of the pipe ...Journal Article -
Hydraulics of embankment weirs
(1998)Journal of Hydraulic EngineeringEmbankment weirs, often found in engineering applications with a side slope 1V:2H, are considered in this paper. For free overflow, the discharge coefficient is determined in terms of relative crest length for long broad-crested, broad-crested, short-crested, and thin-crested weirs. A considerable increase of capacity is noted when compared to broad-crested weirs with vertical faces. For submerged overflow, four regimes are identified: ...Journal Article