@inproceedings{MerboldFroitzheimEgbers, author = {Merbold, Sebastian and Froitzheim, Andreas and Egbers, Christoph}, title = {Turbulent Taylor-Couette flow for very wide gaps}, series = {ICTW 19, Book of Abstracts, 19th International Couette-Taylor Workshop, June 24 - 26, 2015 Cottbus, Germany}, booktitle = {ICTW 19, Book of Abstracts, 19th International Couette-Taylor Workshop, June 24 - 26, 2015 Cottbus, Germany}, address = {Cottbus}, pages = {26 -- 27}, language = {en} } @inproceedings{FroitzheimMerboldEgbers, author = {Froitzheim, Andreas and Merbold, Sebastian and Egbers, Christoph}, title = {Torque measurements and flow visualization in a wide gap Taylor-Couette Flow}, series = {15th European turbulence conference (ETC), Delft, The Netherlands (2015)}, booktitle = {15th European turbulence conference (ETC), Delft, The Netherlands (2015)}, pages = {2}, language = {en} } @incollection{FroitzheimMerboldEgbers, author = {Froitzheim, Andreas and Merbold, Sebastian and Egbers, Christoph}, title = {PIV Messungen in einer Taylor-Couette Str{\"o}mung mit weitem Spalt}, series = {Lasermethoden in der Str{\"o}mungsmesstechnik, 23. Fachtagung, 8. - 10. September 2015, Dresden}, booktitle = {Lasermethoden in der Str{\"o}mungsmesstechnik, 23. Fachtagung, 8. - 10. September 2015, Dresden}, publisher = {GALA}, address = {Karlsruhe}, isbn = {978-3-9816764-1-9}, pages = {S. 27}, language = {de} } @inproceedings{MerboldHarlanderEgbers, author = {Merbold, Sebastian and Harlander, Uwe and Egbers, Christoph}, title = {Physics of rotating fluids, a DFG core facility centre}, series = {88th Annual Meeting of the International Association of Applied Mathematics and Mechanics GAMM, March 6-10, 2017, Weimar, Germany, Book of abstracts}, booktitle = {88th Annual Meeting of the International Association of Applied Mathematics and Mechanics GAMM, March 6-10, 2017, Weimar, Germany, Book of abstracts}, pages = {S. 355}, language = {en} } @inproceedings{FroitzheimMerboldEgbers, author = {Froitzheim, Andreas and Merbold, Sebastian and Egbers, Christoph}, title = {Flow organization in the region of the torque maximum in a wide gap Tayor-Couette experiment}, series = {88th Annual Meeting of the International Association of Applied Mathematics and Mechanics GAMM, March 6-10, 2017, Weimar, Germany, Book of abstracts}, booktitle = {88th Annual Meeting of the International Association of Applied Mathematics and Mechanics GAMM, March 6-10, 2017, Weimar, Germany, Book of abstracts}, pages = {S. 362}, language = {en} } @misc{FroitzheimMerboldEgbers, author = {Froitzheim, Andreas and Merbold, Sebastian and Egbers, Christoph}, title = {Velocity profiles, flow structures and scalings in a wide-gap turbulent Taylor-Couette flow}, series = {Journal of Fluid Mechanics}, volume = {831}, journal = {Journal of Fluid Mechanics}, issn = {0022-112}, doi = {10.1017/jfm.2017.634}, pages = {330 -- 357}, language = {en} } @inproceedings{FroitzheimEzetaMerboldetal., author = {Froitzheim, Andreas and Ezeta, Rodrigo and Merbold, Sebastian and Egbers, Christoph and Lohse, D. and Sun, C.}, title = {Formation of large scale vortices in the torque maximum region in Taylor-Couette flow}, series = {25. GALA - Fachtagung Experimentelle Str{\"o}mungsmechanik, 5.-7. September 2017, Karlsruhe-Ettlingen}, booktitle = {25. GALA - Fachtagung Experimentelle Str{\"o}mungsmechanik, 5.-7. September 2017, Karlsruhe-Ettlingen}, publisher = {Deutsche Gesellschaft f{\"u}r Laser-Anemometrie GALA e.V.}, address = {Karlsruhe}, isbn = {978-3-9816764-3-3}, pages = {55 -- 58}, language = {en} } @inproceedings{YousryMerboldEgbers, author = {Yousry, Mohamed and Merbold, Sebastian and Egbers, Christoph}, title = {LDA measurements over hexagonal structured cavity inside turbulent channel flow}, series = {Experimentelle Str{\"o}mungsmechanik, 25. Fachtagung, 5.-7. September 2017, Karlsruhe}, booktitle = {Experimentelle Str{\"o}mungsmechanik, 25. Fachtagung, 5.-7. September 2017, Karlsruhe}, editor = {Ruck, Bodo}, publisher = {Deutsche Gesellschaft f{\"u}r Laser-Anemometrie GALA e.V.}, address = {Karlsruhe}, isbn = {978-3-9816764-3-3}, pages = {S. 22}, language = {en} } @inproceedings{FroitzheimMerboldEgbers, author = {Froitzheim, Andreas and Merbold, Sebastian and Egbers, Christoph}, title = {Torque measurements in a Taylor-Couette experiment with very small radius ration of 0.357}, series = {16th European Turbulence Conference, 21-24 August, 2017, Stockholm, Sweden}, booktitle = {16th European Turbulence Conference, 21-24 August, 2017, Stockholm, Sweden}, pages = {1}, language = {en} } @inproceedings{HasanuzzamanMotuzMerboldetal., author = {Hasanuzzaman, Gazi and Motuz, Vasyl and Merbold, Sebastian and Egbers, Christoph and Cuvier, Christophe and Foucaut, Jean-Marc}, title = {Turbulent boundary layer statistics under the influence of uniform micro-blowing}, series = {16th European Turbulence Conference, 21-24 August, 2017, Stockholm, Sweden}, booktitle = {16th European Turbulence Conference, 21-24 August, 2017, Stockholm, Sweden}, pages = {1}, language = {en} } @misc{ZanounOenguenerShahirpouretal., author = {Zanoun, El-Sayed and {\"O}ng{\"u}ner, Emir and Shahirpour, Amir and Merbold, Sebastian and Egbers, Christoph}, title = {Spectral Analysis of Large Scale Structures in Fully Developed Turbulent Pipe Flow}, series = {Proceedings in applied mathematics and mechanics : PAMM}, volume = {17}, journal = {Proceedings in applied mathematics and mechanics : PAMM}, number = {1}, issn = {1617-7061}, doi = {10.1002/pamm.201710293}, pages = {647 -- 650}, language = {en} } @inproceedings{FroitzheimMerboldEgbersetal., author = {Froitzheim, Andreas and Merbold, Sebastian and Egbers, Christoph and Ezeta, Rodrigo and Lohse, D. and Sun, C.}, title = {Large scale vortices in the Taylor-Couette flow}, series = {The 12th European Fluid Mechanics Conference, 9 September 2018 - 13 September 2018, Vienna, Austria}, booktitle = {The 12th European Fluid Mechanics Conference, 9 September 2018 - 13 September 2018, Vienna, Austria}, pages = {1}, language = {en} } @inproceedings{HasanuzzamanMerboldMotuzetal., author = {Hasanuzzaman, Gazi and Merbold, Sebastian and Motuz, Vasyl and Egbers, Christoph and Cuvier, Christophe and Foucaut, Jean-Marc}, title = {Experimental investigation of active control in turbulent boundary layer using uniform blowing}, series = {Proceedings of the 5th International Conference on Experimental Fluid Mechanics, Munich 2018}, booktitle = {Proceedings of the 5th International Conference on Experimental Fluid Mechanics, Munich 2018}, editor = {K{\"a}hler, Christian J. and Hain, Rainer and Scharnowski, Sven and Fuchs, Thomas}, publisher = {Institute of Fluid Mechanics and Aerodynamics, Universit{\"a}t der Bundeswehr}, address = {Neubiberg}, isbn = {978-3-943207-32-3}, pages = {180 -- 185}, language = {en} } @inproceedings{MerboldFroitzheimEgbers, author = {Merbold, Sebastian and Froitzheim, Andreas and Egbers, Christoph}, title = {Torque in turbulent Taylor-Couette flow for small radius ratios}, series = {Proceedings of the 5th International Conference on Experimental Fluid Mechanics, Munich 2018}, booktitle = {Proceedings of the 5th International Conference on Experimental Fluid Mechanics, Munich 2018}, editor = {K{\"a}hler, Christian J. and Hain, Rainer and Scharnowski, Sven and Fuchs, Thomas}, publisher = {Institute of Fluid Mechanics and Aerodynamics, Universit{\"a}t der Bundeswehr}, address = {Neubiberg}, isbn = {978-3-943207-32-3}, doi = {10.18726/2018_2}, pages = {598 -- 602}, language = {en} } @misc{FroitzheimEzetaHuismanetal., author = {Froitzheim, Andreas and Ezeta, Rodrigo and Huisman, Sander G. and Merbold, Sebastian and Sun, Chao and Lohse, Detlef and Egbers, Christoph}, title = {Statistics, plumes and azimuthally travelling waves in ultimate Taylor-Couette turbulent vortices}, series = {Journal of Fluid Mechanics}, volume = {Volume 876}, journal = {Journal of Fluid Mechanics}, issn = {1469-7645}, doi = {10.1017/jfm.2019.552}, pages = {733 -- 765}, language = {en} } @misc{FroitzheimMerboldOstillaMonicoetal., author = {Froitzheim, Andreas and Merbold, Sebastian and Ostilla-M{\´o}nico, Rodolfo and Egbers, Christoph}, title = {Angular momentum transport and flow organization in Taylor-Couette flow at radius ratio of η=0.357"}, series = {Physical Review Fluids}, volume = {4}, journal = {Physical Review Fluids}, doi = {10.1103/PhysRevFluids.4.084605}, pages = {20}, language = {en} } @phdthesis{Merbold, author = {Merbold, Sebastian}, title = {Experimental investigation on turbulent transport in Taylor-Couette flow}, edition = {1. Auflage}, publisher = {Cuvillier Verlag}, address = {G{\"o}ttingen}, isbn = {978-3-7369-7068-7}, pages = {xxviii, 173}, language = {en} } @incollection{YousryMerboldEgbers, author = {Yousry, Mohamed and Merbold, Sebastian and Egbers, Christoph}, title = {Influence of convex structured surfaces on turbulent channel flow at different channel heights}, series = {Experimentelle Str{\"o}mungsmechanik : 27. Fachtagung 3.-5. September 2019 Erlangen}, booktitle = {Experimentelle Str{\"o}mungsmechanik : 27. Fachtagung 3.-5. September 2019 Erlangen}, editor = {Delgado, Antonio}, publisher = {Deutsche Gesellschaft f{\"u}r Laser-Anemometrie - German Association for Laser Anemometry GALA e.V.}, address = {Karlsruhe}, isbn = {978-3-9816764-6-4}, pages = {5.1 -- 5.9}, language = {en} } @misc{NowakMerboldEgbersetal., author = {Nowak, Torsten and Merbold, Sebastian and Egbers, Christoph and Schacht, Ralph}, title = {Novel Compact-Thermal-Model Approach to Estimate the Heat Spreading Effects of Flip-Chips on PCB regarding Laminar Flow Regimes}, series = {2019 25th International Workshop on Thermal Investigations of ICs and Systems (THERMINIC)}, journal = {2019 25th International Workshop on Thermal Investigations of ICs and Systems (THERMINIC)}, publisher = {IEEE}, isbn = {978-1-7281-2078-2}, issn = {2474-1523}, doi = {10.1109/THERMINIC.2019.8923434}, pages = {6}, abstract = {Today, electronic and thermal engineers want to figure out, which location are the most compliant one, to ensure electronic function of the system and get a reliable thermal design. Numerical simulations can help to understand thermal paths and interactions between electronic parts nearby. However, there are often time consuming, to set-up all material parameters and fluid flow properties. The usage of Compact Thermal Models (CTM) are often used for power application and can provide first solutions to heat transfer via solid substrate, thermal spreading and solid to fluid interactions. Those CTM cannot fully replace a complex fluid mechanical analysis with a Computational Fluid Dynamics (CFD) software environment. Furthermore, CTM can take place in preliminary studies during the early design phase of electronic systems within the implementation of key parameters e.g. thermal conductivity of the substrate, fluid flow velocity, power losses and different dimensions of the system. This paper continuous the experimental and numerical study of to complete an approach for CTM based thermal equivalent resistor networks with consideration of dynamic heat spreading along the substrate and laminar convective fluid interactions on typical Printed Circuit Boards (PCB) with micro-electronic Flip-Chip (FC) assemblies}, language = {en} } @misc{NowakMerboldEgbersetal., author = {Nowak, Torsten and Merbold, Sebastian and Egbers, Christoph and Schacht, Ralph}, title = {Experimentelle Studie mit numerischer Validierung von thermi-schen Kopplungs-Ph{\"a}nomenen mit in Flip-Chip-Technologie aufge-bauten Testchips auf Leiterplatten}, series = {Experimentelle Str{\"o}mungsmechanik : 27. Fachtagung 3.-5. September 2019 Erlangen}, journal = {Experimentelle Str{\"o}mungsmechanik : 27. Fachtagung 3.-5. September 2019 Erlangen}, editor = {Delgado, Antonio}, publisher = {Deutsche Gesellschaft f{\"u}r Laser-Anemometrie - German Association for Laser Anemometry GALA e.V.}, address = {Karlsruhe}, isbn = {978-3-9816764-6-4}, pages = {27.1 -- 27.8}, abstract = {In aktuellen mikro-elektronischen Systemen m{\"u}ssen verschiedene aktive und passive Bauteile auf engstem Raum miteinander auf dem Substrate (bspw. FR4-Leiterplatte) kombiniert werden. Die dabei stetig steigende Leistungsdichte bedarf einer optimierten K{\"u}hlstrategie und der Definition von konduktiven und konvektiven Entw{\"a}rmungspfade, die bereits w{\"a}hrend der Layout-Designphase der Baugruppe ber{\"u}cksichtigt werden sollten. Str{\"o}mungsmechanische Simulationen (CFD) k{\"o}nnen dabei ein erstes Abbild zur Analyse von Kopplungseffekten zwischen den W{\"a}rmequellen und der Umgebung liefern. Diese sind jedoch oft zeitaufwendig und es bedarf zumindest ein gewisses Grundverst{\"a}ndnis, um die Fluid-mechanischen Parameter, das Vernetzen der Geometrien und die gewonnenen Ergebnisse korrekt zu interpretieren. Erste analytische Ans{\"a}tze zur reduzierten Beschreibung von ungeh{\"a}usten Chips auf Leiterplattensubstrat k{\"o}nnen durch thermische Widerstandsnetzwerke abgebildet und durch Aufteilung der W{\"a}rmestr{\"o}me in Richtung Substrat (W{\"a}rmeleitung) und in Richtung des bewegten Fluides (Konvektion) n{\"a}her beschrieben werden.}, language = {de} }