Pair-production of charged Dirac particles on charged Nariai and ultracold black hole manifolds [PDF]
, 2009 Spontaneous loss of charge by charged black holes by means of pair-creation of charged Dirac particles is considered. We provide three examples of exact calculations for the spontaneous discharge process for 4D charged black holes by considering the ...
Belgiorno, F. +2 more
core +2 more sources
Discharge coefficient of combined rectangular-triangular weirs using soft computing models [PDF]
Journal of Hydraulic Structures, 2023 This study investigates the potential of Adaptive Neuro-fuzzy inference system (ANFIS), M5P, and Gaussian Process regression (GP) approaches to predict discharge coefficient (Cd) of chimney weir with different apex angles.
Hamidreza Abbaszadeh +4 more
doaj +1 more source
Experimental and numerical analysis of flow over a rectangular full-width sharp-crested weir
Water Science and Engineering, 2018 Weirs are a type of hydraulic structure, used for water level adjustment, flow measurement, and diversion of water in irrigation systems. In this study, experiments were conducted on sharp-crested weirs under free-flow conditions and an optimization ...
Ghorban Mahtabi, Hadi Arvanaghi
doaj +1 more source
Pyramidal vortex breakers influences on the flow discharge of morning glory spillway
Ain Shams Engineering Journal, 2020 Vortex is the basic obstacle envisaged in the morning glory spillways that can lead to the reduction of spillway efficiency due to decreasing the discharge coefficient.
Farzaneh Sayadzadeh +3 more
doaj +1 more source
PDMS/PVA composite ferroelectret for improved energy harvesting performance [PDF]
, 2016 This paper address the PDMS ferroelectret discharge issue for improved long- term energy harvesting performance. The PDMS/PVA ferroelectret is fabricated using a 3D-printed plastic mould technology and a functional PVA composite layer is introduced.
Beeby, S. P., Lou, Z., Shi, J., Zhu, D.
core +1 more source
Effect of Channel Slope on Discharge Coefficient of Cylindrical Crested Weirs [PDF]
Engineering and Technology Journal, 2013 This research paper investigates the effect of the longitudinal channel slope on the discharge coefficient of cylindrical weirs. The methodology applied is by adopting three different diameters of the cylindrical weir and at three different slopes of the
Mohammed Tareq Khaleel
doaj +1 more source
Determination of discharge coefficient in the tilted crown sharp-crested weirs [PDF]
Journal of Applied Research in Water and Wastewater, 2022 In this study, the performance of vertical and tilted crown weirs with different angles of the weir crest across the flow has been investigated using numerical and experimental models.
Salma Ajeel Fenjan +2 more
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Discharge coefficient of a rectangular sharp-edged broad-crested weir
Journal of Hydrology and Hydromechanics, 2014 This paper is concerned with the determination of the relationship for the calculation of the discharge coefficient at free overflow over a rectangular sharp-edged broad-crested weir without lateral contraction. The determination was made on the basis of
Zachoval Zbyněk +4 more
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The effect of crest shape on discharge coefficient at linear weirs
Građevinar, 2023 A detailed experimental laboratory analysis of the effect of crest shape on the discharge coefficient of sharp-crested weirs is presented in the paper. The experiments were conducted for four different crest shapes. The experiments and analyses show that
Yusuf Dogan, Nihat Kaya
doaj +1 more source
Evaluation on flow discharge of grassed swale in lowland area [PDF]
, 2014 Grassed swale is an open vegetated channel designed specifically in attenuating stormwater runoff to decrease the velocity, to reduce the peak flows, and minimize the causes of flood.
Ackerman +6 more
core +3 more sources