TY  - CHAP
A1  - Bung, Daniel B.
A1  - Tullis, Blake
T1  - Hydraulic Structures - ISHS2018 in Perspective
T2  - 7th IAHR International Symposium on Hydraulic Structures, Aachen, Germany, 15-18 May
Y1  - 2018
SN  - 978-0-692-13277-7
U6  - http://dx.doi.org/10.15142/T3WH2B
ER  - 
TY  - JOUR
A1  - Bung, Daniel B.
A1  - Valero, Daniel
T1  - Re-aeration on stepped spillways with special consideration of entrained and entrapped air
JF  - Geosciences
N2  - As with most high-velocity free-surface flows, stepped spillway flows become self-aerated when the drop height exceeds a critical value. Due to the step-induced macro-roughness, the flow field becomes more turbulent than on a similar smooth-invert chute. For this reason, cascades are oftentimes used as re-aeration structures in wastewater treatment. However, for stepped spillways as flood release structures downstream of deoxygenated reservoirs, gas transfer is also of crucial significance to meet ecological requirements. Prediction of mass transfer velocities becomes challenging, as the flow regime differs from typical previously studied flow conditions. In this paper, detailed air-water flow measurements are conducted on stepped spillway models with different geometry, with the aim to estimate the specific air-water interface. Re-aeration performances are determined by applying the absorption method. In contrast to earlier studies, the aerated water body is considered a continuous mixture up to a level where 75% air concentration is reached. Above this level, a homogenous surface wave field is considered, which is found to significantly affect the total air-water interface available for mass transfer. Geometrical characteristics of these surface waves are obtained from high-speed camera investigations. The results show that both the mean air concentration and the mean flow velocity have influence on the mass transfer. Finally, an empirical relationship for the mass transfer on stepped spillway models is proposed.
Y1  - 2018
SN  - 2076-3263
VL  - 8
IS  - 9
SP  - Article number 333
PB  - MDPI
CY  - Basel
ER  - 
TY  - CHAP
A1  - Bung, Daniel B.
A1  - Valero, Daniel
A1  - Hermens, G.
T1  - Hybrid investigation on the hydraulic performance of a new trapezoidal fishway
T2  - 7th IAHR International Symposium on Hydraulic Structures, ISHS 2018
Y1  - 2018
SN  - 978-069213277-7
U6  - http://dx.doi.org/10.15142/T3S06R
SP  - 184
EP  - 193
ER  - 
TY  - CHAP
A1  - Duffner, Markus
A1  - Moorkamp, Wilfried
A1  - Peterson, Leif Arne
A1  - Uibel, Thomas
ED  - Kuhlmann, Ulrike
T1  - Untersuchungen zur Tragfähigkeit und Steifigkeit eines neuartigen Wandelements in Holzbauweisen
T2  - Doktorandenkolloquium Holzbau Forschung + Praxis : Stuttgart, 08./09. März 2018
Y1  - 2018
SP  - 131
EP  - 139
PB  - Universität Stuttgart, Institut für Konstruktion und Entwurf
CY  - Stuttgart
ER  - 
TY  - RPRT
A1  - Fischedick, Manfred
A1  - Schoof, René
A1  - Hebel, Christoph
A1  - Merkens, Torsten
A1  - [und 27 weitere], 
T1  - Sektorenkopplung als Herausforderung und Chance für das Energieland NRW : Handlungsoptionen und Ergebnispapier der Expertengruppe AG 4 „Sektoren- kopplung“ im Netzwerk Netze und Speicher der EnergieAgentur.NRW im Auftrag des Landes Nordrhein-Westfalen / EnergieAgentur.NRW GmbH
Y1  - 2018
ER  - 
TY  - CHAP
A1  - Groß, Rolf Fritz
T1  - Möglichkeiten und Grenzen für Forschung an Fachhochschulen
T2  - Smart Building Convention und BIMconvention in Aachen im September
Y1  - 2018
N1  - 10. und 11. September 2018, Aachen
ER  - 
TY  - BOOK
A1  - Jochim, Haldor E.
A1  - Lademann, Frank
T1  - Planung von Bahnanlagen: Grundlagen - Planung - Berechnung
Y1  - 2018
SN  - 978-3-446-44220-7
U6  - http://dx.doi.org/10.3139/9783446448940
PB  - Fachbuchverlag Leipzig im Carl Hanser Verlag
CY  - München
ET  - 2., aktualisierte und erweiterte Auflage
ER  - 
TY  - JOUR
A1  - Jochim, Haldor E.
A1  - Menzel, Christoph J.
T1  - Die Trassenbündelung als Planungsmethode nachhaltiger Verkehrspolitik
JF  - Der Eisenbahningenieur : EI
Y1  - 2018
SN  - 0013-2810
VL  - 69
IS  - 11
SP  - 26
EP  - 31
PB  - DVV Media Group
CY  - Hamburg
ER  - 
TY  - CHAP
A1  - Jockwer, R.
A1  - Kleiber, M.
A1  - Uibel, Thomas
ED  - Görlacher, Rainer
T1  - Criteria for Evaluating the Simplification of Design Rules for Dowel-type Fasteners
T2  - International Network on Timber Engineering Research, INTER : proceedings, meeting 51, 10 - 13 August 2016, Tallinn, Estonia
Y1  - 2018
SP  - 461
EP  - 466
PB  - Timber Scientific Publishing, KIT Holzbau und Baukonstruktionen
CY  - Karlsruhe
ER  - 
TY  - JOUR
A1  - Klubert, Joachim
A1  - Malecha, Hartmut
A1  - Sparla, Peter
T1  - Modernisierung der geodätischen Messtechnik der Urfttalsperre
JF  - Wasserwirtschaft
T2  - Modernisation of the geodetic measurement technology of the Urft dam
Y1  - 2018
SN  - 0043-0978
N1  - gedruckt in der Bereichsbibliothek Bayernallee vorhanden
VL  - 108
IS  - 10
SP  - 14
EP  - 18
PB  - Springer Vieweg
CY  - Wiesbaden
ER  -