TY  - CHAP
A1  - Bung, Daniel Bernhard
A1  - Valero, Daniel
T1  - FlowCV - An open-source toolbox for computer vision applications in turbulent flows
T2  - Proceedings of the 37th IAHR World Congress August 13 – 18, 2017, Kuala Lumpur, Malaysia
Y1  - 2017
SN  - 2521-716X
SP  - 5356
EP  - 5365
ER  - 
TY  - JOUR
A1  - Valero, Daniel
A1  - Viti, Nicolo
A1  - Gualtieri, Carlo
T1  - Numerical Simulation of Hydraulic Jumps. Part 1: Experimental Data for Modelling Performance Assessment
JF  - Water
Y1  - 2019
U6  - https://doi.org/10.3390/w11010036
SN  - 2073-4441
VL  - 11
IS  - 1
SP  - Art. Nr. 36
PB  - MDPI
CY  - Basel
ER  - 
TY  - JOUR
A1  - Viti, Nicolo
A1  - Valero, Daniel
A1  - Gualtieri, Carlo
T1  - Numerical Simulation of Hydraulic Jumps. Part 2: Recent Results and Future Outlook
JF  - Water
Y1  - 2019
U6  - https://doi.org/10.3390/w11010028
SN  - 2073-4441
VL  - 11
IS  - 1
SP  - Art. Nr. 28
ER  - 
TY  - JOUR
A1  - Wolisz, Henryk
A1  - Schütz, Thomas
A1  - Blanke, Tobias
A1  - Hagenkamp, Markus
A1  - Kohrn, Markus
A1  - Wesseling, Mark
A1  - Müller, Dirk
T1  - Cost optimal sizing of smart buildings' energy system components considering changing end-consumer electricity markets
JF  - Energy
Y1  - 2017
U6  - https://doi.org/10.1016/j.energy.2017.06.025
VL  - 137
SP  - 715
EP  - 728
PB  - Elsevier
CY  - Amsterdam
ER  - 
TY  - JOUR
A1  - Valero, D.
A1  - Bung, Daniel Bernhard
A1  - Crookston, B. M.
T1  - Closure to “Energy Dissipation of a Type III Basin under Design and Adverse Conditions for Stepped and Smooth Spillways”
JF  - Journal of Hydraulic Engineering
Y1  - 2019
U6  - https://doi.org/10.1061/(ASCE)HY.1943-7900.0001669
VL  - 146
IS  - 2
PB  - ASCE
CY  - Reston, Va.
ER  - 
TY  - JOUR
A1  - Kerres, Karsten
A1  - Gredigk-Hoffmann, Sylvia
A1  - Jathe, Rüdiger
A1  - Orlik, Stefan
A1  - Sariyildiz, Mustafa
A1  - Schmidt, Torsten
A1  - Sympher, Klaus-Jochen
A1  - Uhlenbroch, Adrian
T1  - Future approaches for sewer system condition assessment
JF  - Water Practice & Technology
N2  - Different analytical approaches exist to describe the structural substance or wear reserve of sewer systems. The aim is to convert engineering assessments of often complex defect patterns into computational algorithms and determine a substance class for a sewer section or manhole. This analytically determined information is essential for strategic rehabilitation planning processes up to network level, as it corresponds to the most appropriate rehabilitation type and can thus provide decision-making support. Current calculation methods differ clearly from each other in parts, so that substance classes determined by the different approaches are only partially comparable with each other. The objective of the German R&D cooperation project ‘SubKanS’ is to develop a methodology for classifying the specific defect patterns resulting from the interaction of all the individual defects, and their severities and locations. The methodology takes into account the structural substance of sewer sections and manholes, based on real data and theoretical considerations analogous to the condition classification of individual defects. The result is a catalogue of defect patterns and characteristics, as well as associated structural substance classifications of sewer systems (substance classes). The methodology for sewer system substance classification is developed so that the classification of individual defects can be transferred into a substance class of the sewer section or manhole, eventually taking into account further information (e.g. pipe material, nominal diameter, etc.). The result is a validated methodology for automated sewer system substance classification.
Y1  - 2020
U6  - https://doi.org/10.2166/wpt.2020.027
SN  - 1751-231X
IS  - 15 (2)
SP  - 386
EP  - 393
PB  - IWA Publishing
CY  - London
ER  - 
TY  - JOUR
A1  - Höttges, Jörg
T1  - QKan - Management of drainage system data with QGIS
JF  - Free and Open Source Software for Geospatial (FOSS4G) Conference Proceedings
Y1  - 2017
VL  - 17
IS  - Article 13
SP  - 95
EP  - 100
ER  - 
TY  - JOUR
A1  - Bung, Daniel Bernhard
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 Bernhard
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  - https://doi.org/10.15142/T3WH2B
ER  - 
TY  - CHAP
A1  - Valero, Daniel
A1  - Vogel, Jochen
A1  - Schmidt, Daniel
A1  - Bung, Daniel Bernhard
T1  - Three-dimensional flow structure inside the cavity of a non-aerated stepped chute
T2  - 7th IAHR International Symposium on Hydraulic Structures, Aachen, Germany, 15-18 May
Y1  - 2018
SN  - 978-0-692-13277-7
U6  - https://doi.org/10.15142/T3GH17
ER  - 
TY  - JOUR
A1  - Valero, Daniel
A1  - Chanson, Hubert
A1  - Bung, Daniel Bernhard
T1  - Robust estimators for turbulence properties assessment
Y1  - 2019
SP  - 1
EP  - 24
ER  - 
TY  - JOUR
A1  - Kuhnhenne, Markus
A1  - Reger, Vitali
A1  - Pyschny, Dominik
A1  - Döring, Bernd
T1  - Influence of airtightness of steel sandwich panel joints on heat losses
JF  - E3S Web of Conferences 12th Nordic Symposium on Building Physics (NSB 2020)
N2  - Energy saving ordinances requires that buildings must be designed in such a way that the heat transfer surface including the joints is permanently air impermeable. The prefabricated roof and wall panels in lightweight steel constructions are airtight in the area of the steel covering layers. The sealing of the panel joints contributes to fulfil the comprehensive requirements for an airtight building envelope. To improve the airtightness of steel sandwich panels, additional sealing tapes can be installed in the panel joint. The influence of these sealing tapes was evaluated by measurements carried out by the RWTH Aachen University - Sustainable Metal Building Envelopes. Different installation situations were evaluated by carrying out airtightness tests for different joint distances. In addition, the influence on the heat transfer coefficient was also evaluated using the Finite Element Method (FEM). The combination of obtained air volume flow and transmission losses enables to create an "effective heat transfer coefficient" due to transmission and infiltration. This summarizes both effects in one value and is particularly helpful for approximate calculations on energy efficiency.
Y1  - 2020
U6  - https://doi.org/10.1051/e3sconf/202017205008
VL  - 172
IS  - Art. 05008
PB  - EDP Sciences
CY  - Les Ulis
ER  - 
TY  - JOUR
A1  - Valero, Daniel
A1  - Chanson, Hubert
A1  - Bung, Daniel Bernhard
T1  - Robust estimators for free surface turbulence characterization: A stepped spillway application
JF  - Flow Measurement and Instrumentation
N2  - Robust estimators are parameters insensitive to the presence of outliers. However, they presume the shape of the variables’ probability density function. This study exemplifies the sensitivity of turbulent quantities to the use of classic and robust estimators and the presence of outliers in turbulent flow depth time series. A wide range of turbulence quantities was analysed based upon a stepped spillway case study, using flow depths sampled with Acoustic Displacement Meters as the flow variable of interest. The studied parameters include: the expected free surface level, the expected fluctuation intensity, the depth skewness, the autocorrelation timescales, the vertical velocity fluctuation intensity, the perturbations celerity and the one-dimensional free surface turbulence spectrum. Three levels of filtering were utilised prior to applying classic and robust estimators, showing that comparable robustness can be obtained either using classic estimators together with an intermediate filtering technique or using robust estimators instead, without any filtering technique.
Y1  - 2020
U6  - https://doi.org/10.1016/j.flowmeasinst.2020.101809
SN  - 0955-5986
VL  - 76
IS  - Art. 101809
PB  - Elsevier
CY  - Amsterdam
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  - Valero, Daniel
A1  - Bung, Daniel Bernhard
A1  - Erpicum, Sebastien
A1  - Peltier, Yann
A1  - Dewals, Benjamin
T1  - Unsteady shallow meandering flows in rectangular reservoirs: a modal analysis of URANS modelling
JF  - Journal of Hydro-environment Research
N2  - Shallow flows are common in natural and human-made environments. Even for simple rectangular shallow reservoirs, recent laboratory experiments show that the developing flow fields are particularly complex, involving large-scale turbulent structures. For specific combinations of reservoir size and hydraulic conditions, a meandering jet can be observed. While some aspects of this pseudo-2D flow pattern can be reproduced using a 2D numerical model, new 3D simulations, based on the unsteady Reynolds-Averaged Navier-Stokes equations, show consistent advantages as presented herein. A Proper Orthogonal Decomposition was used to characterize the four most energetic modes of the meandering jet at the free surface level, allowing comparison against experimental data and 2D (depth-averaged) numerical results. Three different isotropic eddy viscosity models (RNG k-ε, k-ε, k-ω) were tested. The 3D models accurately predicted the frequency of the modes, whereas the amplitudes of the modes and associated energy were damped for the friction-dominant cases and augmented for non-frictional ones. The performance of the three turbulence models remained essentially similar, with slightly better predictions by RNG k-ε model in the case with the highest Reynolds number. Finally, the Q-criterion was used to identify vortices and study their dynamics, assisting on the identification of the differences between: i) the three-dimensional phenomenon (here reproduced), ii) its two-dimensional footprint in the free surface (experimental observations) and iii) the depth-averaged case (represented by 2D models).
KW  - coherent structures
KW  - hydraulic modelling
KW  - model performance
KW  - Proper Orthogonal Decomposition
KW  - Q-criterion
Y1  - 2022
U6  - https://doi.org/10.1016/j.jher.2022.03.002
SN  - 1570-6443
IS  - In Press
PB  - Elsevier
CY  - Amsterdam
ER  - 
TY  - CHAP
A1  - Valero, Daniel
A1  - Bung, Daniel Bernhard
A1  - Oertel, M.
ED  - Dewals, Benjamin
T1  - Turbulent dispersion in bounded horizontal jets : RANS capabilities and physical modeling comparison
T2  - Sustainable Hydraulics in the Era of Global Change : Proceedings of the 4th IAHR Europe Congress (Liege, Belgium, 27-29 July 2016)
Y1  - 2016
SN  - 978-1-138-02977-4
SN  - 978-1-4987-8149-7 (eBook)
U6  - https://doi.org/10.1201/b21902-13
SP  - 49
EP  - 55
PB  - CRC Press
ER  - 
TY  - RPRT
A1  - Sansom, M.
A1  - Lawson, R.M.
A1  - Tucho, R.
A1  - Kendrick, C.
A1  - Ogden, R.
A1  - Resalati, S.
A1  - Garay, R.
A1  - Döring, Bernd
A1  - Reger, V.
A1  - Gilbert, J.
A1  - Heikkinen, J.
A1  - Hemmila, K.
T1  - Building in active thermal mass into steel structures (BATIMASS) - EUR 28166EN
N2  - The main objective of the BATIMASS project was to address how the energy balance in relatively lightweight steel buildings can be improved by building in ‘active thermal mass’ (ATM) into the building fabric. This was achieved through concept design, dynamic thermal modelling and testing of a number of potentially viable systems and concepts. A significant programme of thermal simulation modelling was undertaken utilising the thermally equivalent slab (TES) concept to model the passive thermal capacity effect of profiled, composite metal floor decks. It is apparent from the modelling results that thermal mass is a highly complex phenomenon which is highly dependent upon building type, occupancy patterns, climate and many other aspects of the building design and servicing strategy. The ATM systems developed, both conceptually and for prototype testing, focussed on water-cooled composite slabs, the Cofradal floor system and the phase change material (PCM) Energain. In addition to laboratory testing of prototypes, whole building monitoring was undertaken at the Kubik building in Spain and the RWTH test building in Germany. Advanced thermal modelling was also undertaken to estimate the likely benefits of the ATM concept designs developed and for comparison with the test results. In addition to thermal testing, structural tests were conducted on composite floor specimens incorporating embedded water pipes. This Final Report presents the results of the activities carried out under this RFCS contract RFSR CT 2012 00033. The work carried out is reported in six major sections corresponding to the technical Work Packages of the project. Only summaries of the work carried out are provided in this report; all work undertaken is fully reported in the formal project deliverables.
KW  - industrial research
KW  - iron and steel industry
KW  - research project
KW  - materials technology
KW  - resistance of materials
KW  - steel
KW  - metal structure
KW  - ingot
KW  - building industry
KW  - research report
Y1  - 2016
SN  - 978-92-79-63176-4
U6  - https://doi.org/10.2777/25999
SN  - 1831-9424
PB  - Publications Office of the European Union
CY  - Luxembourg
ER  - 
TY  - RPRT
A1  - Lawson, R.M.
A1  - Baddoo, N.R.
A1  - Vanier, G.
A1  - Döring, Bernd
A1  - Kuhnhenne, M.
A1  - Nieminen, J.
A1  - Beguin, P.
A1  - Herbin, S.
A1  - Caroli, G.
A1  - Adetunji, I.
A1  - Kozlowski, A.
T1  - Renovation of buildings using steel technologies (Robust) - EUR 25335
N2  - Robust addresses the renovation and improvement of existing residential, industrial and commercial buildings using steel-based technologies, focusing on techniques such as over-cladding, over-roofing and roof-top extensions. Steel-intensive renovation techniques currently on the market were reviewed. Performance criteria were developed for over-cladding systems meeting current regulatory standards, with guidelines on how to achieve appropriate levels of air-tightness.
KW  - iron and steel industry
KW  - steel
KW  - materials technology
KW  - building materials
KW  - metal structure
KW  - building safety
KW  - testing
KW  - industrial research
Y1  - 2013
SN  - 978-92-79-24950-1
U6  - https://doi.org/10.2777/97860
SN  - 1831-9424
PB  - Publications Office of the European Union
CY  - Luxembourg
ER  - 
TY  - RPRT
A1  - Feldmann, M.
A1  - Kuhnhenne, M.
A1  - Döring, Bernd
A1  - Pyschny, D.
A1  - Lawson, R.M.
A1  - Chuter, R.D.
A1  - Boudjabeur, S.
A1  - Lecomte-Labory, F.
A1  - Airaksinen, M.
A1  - Heikkinen, J.
A1  - Laamanen, J.
A1  - Albart, P.
A1  - D'Haeyer, R.
A1  - Chica, J.A.
A1  - Maseda, J.M.
A1  - Amundarain, A.
A1  - Rips, M.O.
A1  - Nuñez, J.A.
A1  - Macías, O.
A1  - Beguin, P.
A1  - Ben Larbi, A.
T1  - Energy and thermal improvements for construction in steel (ETHICS) - EUR 26010
N2  - ETHICS is concerned with evaluating, measuring and making improvements in the thermal and energy performance of steel-clad and steel-framed buildings. It addresses basic building physics performance at a laboratory and full-scale level, and the preparation of design guidance for commercial, industrial and residential buildings. It includes the development of design tools to assist users in assessing whole-building performance, and calibrates these tools against whole-building measurements, which will be obtained from this research. Opportunities for renewable energy and other energy-saving features will be assessed. This project focuses on objectives that are of particular interest for the design of new steel constructions regarding energy efficiency. ETHICS investigates the as-built performance by on-site tests regarding air tightness and heat transfer properties of the building envelope and by monitoring the energy consumption and thermal comfort of selected up-to-date steel buildings. As energy efficiency is a key requirement for design and construction of buildings in the future, this project provides well-founded scientific data, which prove the high energy performance of current steel constructions and work out details for further improvements to maintain and extend the position of steel products in the construction sector.
KW  - steel
KW  - metal structure
KW  - building technique
KW  - energy efficiency
KW  - thermal insulation
KW  - industrial research
KW  - research report
Y1  - 2013
SN  - 978-92-79-30789-8
U6  - https://doi.org/10.2777/17106
SN  - 1831-9424
PB  - Publications Office of the European Union
CY  - Luxembourg
ER  - 
TY  - RPRT
A1  - Kesti, Jyrki
A1  - Mononen, Tarmo
A1  - Lautso, Petteri
A1  - Döring, Bernd
A1  - Reger, Vitali
A1  - Holopainen, R.
A1  - Jung, N.
A1  - Shemeikka, J.
A1  - Nieminen, J.
A1  - Reda, F.
A1  - Lawson, Mark
A1  - Botti, Andrea
A1  - Hall, R.
A1  - Zold, A.
A1  - Buday, T.
T1  - Zero energy solutions for multifunctional steel intensive commercial buildings (ZEMUSIC) - EUR 27627
N2  - The broad commercial objective of this project was the sustainable value creation in steel building technology by addressing the ways in which significant energy reductions can be made in the operation phase of multi-storey commercial buildings. A review on energy efficient commercial buildings in Europe has been carried out consisting of several case studies from different countries. The project included development of zero-energy concepts for reducing energy demand as well as concepts for heating, cooling and ventilation systems by utilising renewable energy sources in three different climates. Also alternative structural frame solutions were developed and analyzed in respect of structural and MEP (mechanical, electrical and plumbing solutions) features. An innovative long span floor system with integrated MEP routings promises a cost effective alternative for sophisticated ventilation distribution and radiant heating and cooling systems, allowing for high energy efficiency and high quality interior climate. The report includes also review of best architectural practices for integrated renewable energy solutions including different design strategies for building facades of zero energy buildings. Interesting results and design basis are also presented for steel energy pile concept, where structural foundation piles are utilized for ground energy harvesting. Life cycle cost calculations for near zero energy office building based on developed technologies show that a near zero energy construction is also profitable. The results and work methods of the project have been summarized in the form of design guidance that offers designers the knowledge gained in a form that can be easily understood.
KW  - steel
KW  - iron and steel industry
KW  - resistance of materials
KW  - materials technology
KW  - metal structure
KW  - research project
KW  - building industry
KW  - building materials
KW  - renewable energy
KW  - designs and models
KW  - research report
KW  - guide
Y1  - 2015
SN  - 978-92-79-54071-4
U6  - https://doi.org/10.2777/111520
SN  - 1831-9424
N1  - Enthalten: Appendix Design Guide: Deliverable Report WP6.4 Design Guide for steel intensive nearly zero office buildings (83 Seiten)
PB  - Publications Office of the European Union
CY  - Luxembourg
ER  -