@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} }