@inproceedings{KersteinGlaweSchmidtetal., author = {Kerstein, Alan R. and Glawe, Christoph and Schmidt, Heiko and Klein, Rupert and Gonzalez-Juez, Esteban D. and Schmidt, Rodney}, title = {Computational modeling of scalar transport and buoyancy effects in turbulent flows using ODTLES}, series = {Bulletin of the American Physical Society}, volume = {57}, booktitle = {Bulletin of the American Physical Society}, number = {17}, language = {en} } @inproceedings{SchmidtEgbersRath, author = {Schmidt, J.-R. and Egbers, Christoph and Rath, H. J.}, title = {Experiments on the isothermal flow in wide spherical gaps}, language = {en} } @inproceedings{RistauMeierEgbersetal., author = {Ristau, R. and Meier, M. and Egbers, Christoph and Schmidt, J.-R. and Poppe, T.}, title = {Partikelbeladene Str{\"o}mungen : Simulation und Messtechnik}, language = {de} } @inproceedings{StueckeNobisSchmidtetal., author = {St{\"u}cke, Peter and Nobis, Matthias and Schmidt, M. and Scurtu, Nicoleta and Egbers, Christoph}, title = {Laseroptische und numerische Untersuchung von Taylorwirbeln}, language = {de} } @misc{SchulzGlaweSchmidtetal., author = {Schulz, Falko T. and Glawe, Christoph and Schmidt, Heiko and Kerstein, Alan R.}, title = {Toward modeling of CO2 multi-phase flow patterns using a stochastic multi-scale approach}, series = {Environmental Earth Sciences}, volume = {70}, journal = {Environmental Earth Sciences}, number = {8}, issn = {1866-6299}, doi = {10.1007/s12665-013-2461-5}, pages = {3739 -- 3748}, language = {en} } @inproceedings{SchulzGlaweSchmidtetal., author = {Schulz, Falko T. and Glawe, Christoph and Schmidt, Heiko and Kerstein, Alan R.}, title = {Liquid jet simulation using one-dimensional turbulence}, series = {14th European Turbulence Conference, Lyon, France, September 1-4, 2013}, booktitle = {14th European Turbulence Conference, Lyon, France, September 1-4, 2013}, language = {en} } @inproceedings{SchulzGlaweKersteinetal., author = {Schulz, Falko T. and Glawe, Christoph and Kerstein, Alan R. and Schmidt, Heiko}, title = {Toward modeling of supercritical CO2 flow using map-based advection}, series = {EGU General Assembly 2012, held 22-27 April, 2012 in Vienna}, booktitle = {EGU General Assembly 2012, held 22-27 April, 2012 in Vienna}, language = {en} } @misc{SchmidtGlaweJozefiketal., author = {Schmidt, Heiko and Glawe, Christoph and Jozefik, Zoltan and Meiselbach, Falko T. and Kerstein, Alan R.}, title = {On the benefits of ODT-based stochastic turbulence modeling}, series = {Proceedings in applied mathematics and mechanics : PAMM}, volume = {14}, journal = {Proceedings in applied mathematics and mechanics : PAMM}, number = {1}, issn = {1617-7061}, pages = {655 -- 656}, abstract = {We summarize the group's progress in applying, analyzing, and improving ODT and ODT-based stochastic turbulence models like ODTLES. Compared to DNS these models span a wider range of scales while compared to RANS/LES (i) the molecular effects are retained and (ii) no assumption of scale separation is made. In this regard ODTLES has more properties of DNS than of standard LES.}, language = {en} } @techreport{KempkaHerdHuengesetal., author = {Kempka, Thomas and Herd, Rainer and Huenges, Ernst and Jahnke, Christoph and Janetz, S. and Jolie, Egbert and K{\"u}hn, M. and Margi, F. and M{\"o}ller, M. and Munoz, Gerard and Ritter, Oliver and Schafrik, Wladislaw and Schmidt-Hattenberger, Cornelia and Tillner, Elena and Voigt, Hans-J{\"u}rgen and Zimmermann, G.}, title = {CO2-Speicherung in Ostbrandenburg: Implikationen f{\"u}r eine synergetische geothermische Energiegewinnung und Konzeptionierung eines Fr{\"u}hwarnsystems gegen Grundwasserversalzung}, address = {Potsdam [u.a.]}, pages = {125}, language = {de} } @incollection{KempkaHerdHuengesetal., author = {Kempka, Thomas and Herd, Rainer and Huenges, Ernst and Endler, Ricarda and Jahnke, Christoph and Janetz, Silvio and Jolie, Egbert and K{\"u}hn, Michael and Magri, Fabien and Meinert, Peter and Moeck, Inga and M{\"o}ller, Marcus and Munoz, Gerard and Ritter, Oliver and Schafrik, Wladislaw and Schmidt-Hattenberger, Cornelia and Tillner, Elena and Voigt, Hans-J{\"u}rgen and Zimmermann, G{\"u}nter}, title = {Geological Storage of CO2 - Long Term Security Aspects}, editor = {Liebscher, Axel and M{\"u}nch, Ute}, publisher = {Springer}, address = {Berlin [u.a.]}, isbn = {978-3-319-13929-6}, pages = {183 -- 209}, language = {en} } @misc{EgbersGorenzSchmidtetal., author = {Egbers, Christoph and Gorenz, Paul and Schmidt, Marcus and Wolf, Carsten}, title = {3-D-CFD-Simulation der Schmierspaltstr{\"o}mung in einem Radialgleitlager}, series = {Motortechnische Zeitschrift : MTZ}, volume = {76}, journal = {Motortechnische Zeitschrift : MTZ}, number = {7-8}, issn = {2192-8843}, pages = {66 -- 73}, language = {de} } @incollection{KempkaHerdHuengesetal., author = {Kempka, Thomas and Herd, Rainer and Huenges, Ernst and Endler, Ricarda and Jahnke, Christoph and Janetz, Silvio and Jolie, Egbert and K{\"u}hn, Michael and Magri, Fabien and Meinert, Peter and Moeck, Inga and M{\"o}ller, Marcus and Munoz, Gerard and Ritter, Oliver and Schafrik, Wladislaw and Schmidt-Hattenberger, Cornelia and Tillner, Elena and Voigt, Hans-J{\"u}rgen and Zimmermann, G{\"u}nter}, title = {Joint Research Project Brine: Carbon Dioxide Storage in Eastern Brandenburg; Implications for Synergetic Geothermal Heat Recovery and Conceptualization of an Early Warning System Against Freshwater Salinization}, series = {Geological Storage of CO2 - Long Termim Security Aspects}, booktitle = {Geological Storage of CO2 - Long Termim Security Aspects}, editor = {Liebscher, Axel and M{\"u}nch, Ute}, publisher = {Springer}, address = {Cham Switzerland}, isbn = {978-3-319-13929-6}, doi = {10.1007/978-3-319-13930-2}, pages = {183 -- 208}, language = {en} } @misc{GlaweSchmidtKersteinetal., author = {Glawe, Christoph and Schmidt, Heiko and Kerstein, Alan R. and Klein, Rupert}, title = {XLES Part I: Introduction to Extended Large Eddy Simulation}, series = {arXiv.org}, journal = {arXiv.org}, pages = {38}, abstract = {Direct numerical simulation (DNS), mostly used in fundamental turbulence research, is limited to low turbulent intensities due the current and future computer resources. Standard turbulence models, like RaNS (Reynolds averaged Navier-Stokes) and LES (Large Eddy Simulation), are applied to flows in engineering, but they miss small scale effects, which are frequently of importance, see e.g. the whole area of reactive flows, flows with apparent Prandtl or Schmidt number effects, or even wall bounded flows. A recent alternative to these standard approaches is the one-dimensional turbulence (ODT) model, which is limited to 1D sub-domains. In two papers we will provide a generalized filter strategy, called XLES (extended LES), including a formal theory (part I) and one special approach in the XLES family of models, called ODTLES (in part II (see Glawe et al. (2015))). ODTLES uses an ODT sub-grid model to describe all turbulent scales not represented by XLES, which leaves the larger scales to be simulated in 3D. This allows a turbulence modeling approach with a 3D resolution mainly independent of the turbulent intensity. Thus ODTLES is able to compute highly turbulent flows in domains of moderate complexity affordably and including the full range of turbulent and diffusive scales. The convergence of XLES to DNS is shown and the unconventional XLES advection approach is investigated in basic numerical tests. In part II, highly turbulent channel and duct flow results are discussed and show the future potential of XLES and ODTLES.}, language = {en} } @inproceedings{ZellhoeferBoettcherBertrametal., author = {Zellh{\"o}fer, David and B{\"o}ttcher, Thomas and Bertram, Maria and Schmidt, Christoph and Tillmann, Claudius and Uhlig, Markus and Zierenberg, Marcel and Schmitt, Ingo}, title = {PythiaSearch - Interaktives, Multimodales Multimedia-Retrieval}, series = {Datenbanksysteme f{\"u}r Business, Technologie und Web (BTW), Proceedings der 15. Fachtagung des GI-Fachbereichs "Datenbanken und Informationssysteme" (DBIS), 2013, Magdeburg, Deutschland.}, booktitle = {Datenbanksysteme f{\"u}r Business, Technologie und Web (BTW), Proceedings der 15. Fachtagung des GI-Fachbereichs "Datenbanken und Informationssysteme" (DBIS), 2013, Magdeburg, Deutschland.}, editor = {Markl, Volker and Saake, Gunter and Sattler, Kai-Uwe and Hackenbroich, Gregor and Mitschang, Bernhard and H{\"a}rder, Theo and K{\"o}ppen, Veit}, publisher = {Gesellschaft f{\"u}r Informatik}, address = {Bonn}, isbn = {978-3-88579-608-4}, pages = {495 -- 498}, abstract = {PythiaSearch ist ein interaktives Multimedia-Retrieval-System. Es vereint verschiedene Suchstrategien, diverse Visualisierungen und erlaubt eine Personalisierung der Retrieval-Ergebnisse mittels eines Pr{\"a}ferenz-basierten Relevance Feedbacks. Das System nutzt die probabilistische Anfragesprache CQQL und erlaubt eine multi-modale Anfragedefinition basierend auf Bildern, Texten oder Metadaten.}, language = {de} } @misc{NobisReinkeSchmidtetal., author = {Nobis, Matthias and Reinke, Peter and Schmidt, Marcus and Egbers, Christoph}, title = {Einfluss der Wellenverlagerung auf das Str{\"o}mungsfeld im Schmierspalt eines Gleitlagermodells}, series = {Experimentelle Str{\"o}mungsmechanik, 24. Fachtagung 6.-8. September 2016 Cottbus}, journal = {Experimentelle Str{\"o}mungsmechanik, 24. Fachtagung 6.-8. September 2016 Cottbus}, editor = {Egbers, Christoph}, publisher = {German Association for Laser Anemometry GALA e.V.}, address = {Karlsruhe}, isbn = {978-3-9816764-2-6}, pages = {S. 29}, language = {de} } @misc{KupferbergIacoboniFlanaginetal., author = {Kupferberg, Aleksandra and Iacoboni, Marco and Flanagin, Virginia and Huber, Markus and Kasparbauer, Anna and Baumgartner, Thomas and Hasler, Gregor and Schmidt, Florian and Borst, Christoph and Glasauer, Stefan}, title = {Fronto-parietal coding of goal-directed actions performed by artificial agents}, series = {Human Brain Mapping}, volume = {39}, journal = {Human Brain Mapping}, number = {3}, issn = {1097-0193}, doi = {10.1002/hbm.23905}, pages = {1145 -- 1162}, language = {en} } @misc{GlaweMedinaMendezSchmidt, author = {Glawe, Christoph and Medina M{\´e}ndez, Juan Ali and Schmidt, Heiko}, title = {IMEX based Multi-Scale Time Advancement in ODTLES,}, series = {Zeitschrift f{\"u}r angewandte Mathematik und Mechanik}, volume = {98}, journal = {Zeitschrift f{\"u}r angewandte Mathematik und Mechanik}, number = {11}, issn = {1521-4001}, doi = {10.1002/zamm.201800098}, pages = {1907 -- 1923}, language = {en} } @misc{GlaweKleinSchmidt, author = {Glawe, Christoph and Klein, Marten and Schmidt, Heiko}, title = {ODT augmented RaNS}, series = {Book of Abstracts of the 93rd Annual Meeting of the International Association of Applied Mathematics and Mechanics}, journal = {Book of Abstracts of the 93rd Annual Meeting of the International Association of Applied Mathematics and Mechanics}, publisher = {GAMM e.V.}, address = {Dresden}, pages = {368}, language = {en} } @inproceedings{MedinaMendezGlaweStaricketal., author = {Medina M{\´e}ndez, Juan Ali and Glawe, Christoph and Starick, Tommy and Sch{\"o}ps, Mark Simon and Schmidt, Heiko}, title = {IMEX-ODTLES: A multi-scale and stochastic approach for highly turbulent flows}, series = {90th Annual Meeting of the International Association of Applied Mathematics and Mechanics February 18-22, 2019 Vienna, Austria, Abstract book}, booktitle = {90th Annual Meeting of the International Association of Applied Mathematics and Mechanics February 18-22, 2019 Vienna, Austria, Abstract book}, publisher = {TU-Verlag}, address = {Wien}, isbn = {978-3-903024-84-7}, pages = {S. 540}, language = {en} } @techreport{BoettgerFelgentreffHesseetal., author = {B{\"o}ttger, Stefan and Felgentreff, Bernd and Hesse, Gerold and Hloucal, Martin-Joseph and Leßmann, Dieter and Mix, Sebastian and Roselt, Kersten and Safarik, Mathias and Schmidt, J{\"o}rg and Steffan, Christoph and Uhlmann, Wilfried}, title = {Seethermie - Innovative W{\"a}rmeversorgung aus Tagebaurestseen - Schlussbericht}, address = {Leipzig}, pages = {146}, language = {de} } @inproceedings{GlaweSchulzGonzalezJuezetal., author = {Glawe, Christoph and Schulz, Falko T. and Gonzalez-Juez, Esteban D. and Schmidt, Heiko and Kerstein, Alan R.}, title = {ODTLES Simulations of Turbulent Flows through Heated Channels and Ducts}, series = {8th International Symposium on turbulence and shear flow phenomena (TSFP8), 28-30 August 2013, Poitiers, France, vol. 2}, booktitle = {8th International Symposium on turbulence and shear flow phenomena (TSFP8), 28-30 August 2013, Poitiers, France, vol. 2}, pages = {1 -- 6}, abstract = {A widely occurring problem in fluid dynamics either in engineering or e.g. hydrology is the turbulent transport through channels and ducts. ODTLES, a stochastic based multi-scale and multi-dimensional model, is a promising tool to describe these flows even including scalar proper- ties like temperature. We are quantifying the ability of ODTLES to describe the heated channel flow with respect to the Prandtl number and the flow through squared ducts with respect to the Reynolds number.}, language = {en} } @inproceedings{GlaweSchmidtKerstein, author = {Glawe, Christoph and Schmidt, Heiko and Kerstein, Alan R.}, title = {ODTLES: A Multi-scale Ansatz for highly turbulent flows}, series = {15 The European turbulence conference, 25-28 august, 2015, Delft, The Netherland}, booktitle = {15 The European turbulence conference, 25-28 august, 2015, Delft, The Netherland}, pages = {2}, abstract = {We use ODTLES, a multi-dimensional extension of the One-Dimensional-Turbulence model (ODT). ODT describes turbulent advection on a 1D sub-domain using a stochastic process for turbulent advection. These 1D sub-domains are coupled to obtain a 3D approach. ODTLES is applied to channel flow. Preliminary results for the pdf of the wall shear stress are compared to DNS.}, language = {en} } @misc{MedinaMendezGlaweStaricketal., author = {Medina M{\´e}ndez, Juan Ali and Glawe, Christoph and Starick, Tommy and Sch{\"o}ps, Mark Simon and Schmidt, Heiko}, title = {IMEX-ODTLES: A multi-scale and stochastic approach for highly turbulent flows}, series = {Proceedings in Applied Mathematics and Mechanics}, volume = {19}, journal = {Proceedings in Applied Mathematics and Mechanics}, number = {1}, issn = {1617-7061}, doi = {10.1002/pamm.201900433}, abstract = {The stochastic One-Dimensional Turbulence (ODT) model is used in combination with a Large Eddy Simulation (LES) approach in order to illustrate the potential of the fully coupled model (ODTLES) for highly turbulent flows. In this work, we use a new C++ implementation of the ODTLES code in order to analyze the computational performance in a classical incompressible turbulent channel flow problem. The parallelization potential of the model, as well as its physical and numerical consistency are evaluated and compared to Direct Numerical Simulations (DNSs). The numerical results show that the model is capable of reproducing a representative part of the DNS data at a cheaper computational cost. This advantage can be enhanced in the future by the implementation of a straightforward parallelization approach.}, language = {en} } @misc{GlaweSchmidtKersteinetal., author = {Glawe, Christoph and Schmidt, Heiko and Kerstein, Alan R. and Klein, Rupert}, title = {XLES Part II: From Extended Large Eddy Simulation to ODTLES}, series = {arXiv.org}, journal = {arXiv.org}, pages = {41}, abstract = {In turbulence research and flow applications, turbulence models like RaNS (Reynolds averaged Navier-Stokes) models and LES (Large Eddy Simulation) are used. Both models filter the governing flow equations. Thus a scale separation approach is introduced for modeling purposes with the large scales simulated using a numerical scheme while smaller scales are assumed to be less important and might be modeled more or less easily. Unfortunately small scales are frequently of big importance, e.g. in reactive flows, wall bounded flows, or flows with significant Prandtl or Schmidt number effects. Recent alternatives to these standard models are the class of models based on the one-dimensional turbulence (ODT) idea, like ODTLES. The ability of ODT to capture highly turbulent flows (recently up to Reτ=6×105) allows ODTLES to realize 3D resolutions basically independent of the turbulent intensity. In two papers we provide a formal theory and application of an innovative modeling strategy for highly turbulent flows in domains of moderate complexity: In part I (see Glawe et al. (2015)) a new general filtering approach, called XLES (extended LES), is introduced. Contrary to LES, XLES is based on 2D filtering of the governing equations, whereby additional small scale terms are interpreted numerically. In this work a new ansatz for the ODTLES model is introduced as one special approach in the XLES family of models by incorporating the ODT model into XLES. The ODT model introduces microstructures not captured by the XLES filtered equations. To illustrate the ODTLES model capabilities, turbulent channel and duct flows up to friction Reynolds number Reτ=10000 are studied.}, language = {en} } @inproceedings{GlaweSchmidtKerstein, author = {Glawe, Christoph and Schmidt, Heiko and Kerstein, Alan R.}, title = {ODTLES: Mulitscale turbulence modeling and buoyant application}, series = {Book of abstracts, 7th European Postgraduate Fluid Dynamics Conference, Ilmenau, Germany, 14th - 17th, July 2014}, booktitle = {Book of abstracts, 7th European Postgraduate Fluid Dynamics Conference, Ilmenau, Germany, 14th - 17th, July 2014}, address = {Ilmenau}, pages = {S.46}, language = {en} } @inproceedings{GlaweKleinKersteinetal., author = {Glawe, Christoph and Klein, Rupert and Kerstein, Alan R. and Schmidt, Heiko}, title = {Towards the simulation of gravity waves using the One-Dimensional Turbulence model}, series = {EGU General Assembly 2012, held 22-27 April, 2012 in Vienna}, booktitle = {EGU General Assembly 2012, held 22-27 April, 2012 in Vienna}, language = {en} } @inproceedings{NobisReinkeSchmidtetal., author = {Nobis, Matthias and Reinke, Peter and Schmidt, Marcus and Redlich, Marcel and Egbers, Christoph and Herzog, Nicoleta and Gorenz, Paul and Christl, Andreas}, title = {Untersuchung der instation{\"a}ren Gleitlagerstr{\"o}mung}, series = {21. GALA-Tagung 2013, Lasermethoden in der Str{\"o}mungsmesstechnik, 03. - 05. September 2013, M{\"u}nchen}, booktitle = {21. GALA-Tagung 2013, Lasermethoden in der Str{\"o}mungsmesstechnik, 03. - 05. September 2013, M{\"u}nchen}, publisher = {Dt. Gesellschaft f{\"u}r Laser-Anemometrie}, address = {Karlsruhe}, isbn = {978-3-9805613-9-6}, pages = {51.1 -- 51.10}, language = {de} } @inproceedings{JozefikFrechenHinzetal., author = {Jozefik, Zoltan and Frechen, Tobias Nanu and Hinz, Christoph and Schmidt, Heiko}, title = {A cellular automata approach for modeling surface water runoff}, series = {European Geosciences Union, General Assembly 2015, Vienna, Austria, 13 April - 17 May 2015}, booktitle = {European Geosciences Union, General Assembly 2015, Vienna, Austria, 13 April - 17 May 2015}, publisher = {European Geophysical Society}, address = {Katlenburg-Lindau}, language = {en} } @misc{FahrionDraegerLakatosetal., author = {Fahrion, Marc-Steffen and Draeger, Susan and Lakatos, Michael and Schmidt, Timo and Nickl, Christoph and Brombacher, Moritz and Bangalore, Deekshitha and Sundermann, Wolfgang}, title = {KLIBAU - Weiterentwicklung und Konkretisierung des Klimaangepassten Bauens : Handlungsempfehlungen f{\"u}r Planer und Architekten}, pages = {69}, language = {de} } @inproceedings{KempkaHerdHuengesetal., author = {Kempka, Thomas and Herd, Rainer and Huenges, Ernst and Jahnke, Christoph and K{\"u}hn, Michael and Moeck, Inga and Munoz, Gerard and Ritter, Oliver and Schmidt-Hattenberger, Cornelia and Voigt, Hans-J{\"u}rgen and Zimmermann, G{\"u}nter}, title = {brine - CO2 storage in eastern Brandenburg:Implications for geothermal heat provision and conception of a salinisation early warning system}, editor = {Schueth, C.}, language = {en} } @misc{GlaweKleinSchmidt, author = {Glawe, Christoph and Klein, Marten and Schmidt, Heiko}, title = {Stochastic deconvolution of wall statistics in Reynolds-averaged Navier-Stokes simulations based on one-dimensional turbulence}, series = {Proceedings in applied mathematics and mechanics : PAMM}, volume = {23}, journal = {Proceedings in applied mathematics and mechanics : PAMM}, number = {3}, issn = {1617-7061}, doi = {10.1002/pamm.202300055}, pages = {9}, abstract = {Reynolds-averaged Navier-Stokes simulation (RaNS) is state-of-the-art for numerical analysis of complex flows at high Reynolds number. Standalone RaNS may yield a reasonable estimate of the wall-shear stress and turbulent drag if a proper wall-function is prescribed, but detailed turbulence statistics cannot be obtained, especially at the wall. This lack in modeling is addressed here by a stochastic deconvolution strategy based on a stochastic one-dimensional turbulence (ODT) model. Here, a one-way coupling strategy is proposed in which a forcing term is computed from the balanced RaNS solution that is in turn utilized in the ODT model. The temporally developing ODT solution exhibits turbulent perturbations but relaxes toward the local RaNS solution due to resolved molecular-diffusive processes. It is demonstrated that the approach is able to recover the distribution of positive wall-shear stress fluctuations in turbulent channel flow. When formulated as post-processing tool, it is suggested that RaNS can be enhanced by ODT providing economical means for local high-fidelity numerical modeling based on a low-fidelity flow solution.}, language = {en} }