Auflistung nach Schlagwort "Turbulence"

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  • Analysis of pressure-strain and pressure gradient-scalar covariances in cloud-topped boundary layers: A large-eddy simulation study 
    Heinze, Rieke; Mironov, Dmitrii; Raasch, Siegfried (Hoboken, NJ : Blackwell Publishing Ltd, 2016)
    A detailed analysis of the pressure-scrambling terms (i.e., the pressure-strain and pressure gradient-scalar covariances) in the Reynolds-stress and scalar-flux budgets for cloud-topped boundary layers (CTBLs) is performed ...
  • A cloud microphysics parameterization for shallow cumulus clouds based on Lagrangian cloud model simulations 
    Noh, Yign; Oh, Donggu; Hoffmann, Fabian; Raasch, Siegfried (Boston, Massachusetts : American Meteorological Society, 2018)
    Cloud microphysics parameterizations for shallow cumulus clouds are analyzed based on Lagrangian cloud model (LCM) data, focusing on autoconversion and accretion. The autoconversion and accretion rates,A and C, respectively, ...
  • Experimental investigation of low-frequency pulsed Lorentz force influence on the motion of Galinstan melt 
    Musaeva, Diana; Ilyin, Vladimir K.; Geža, Vadims; Baake, Egbert (Amsterdam : Elsevier B.V., 2016)
    The paper presents the results of the numerical and physical experiments, aimed at assessing the influence of pulsed force of electromagnetic field on the melt motion and the fluid velocities. The experiment was performed ...
  • High-resolution large-eddy simulation of indoor turbulence and its effect on airborne transmission of respiratory pathogens - Model validation and infection probability analysis 
    Auvinen, Mikko; Kuula, Joel; Grönholm, Tiia; Sühring, Matthias; Hellsten, Antti ([Erscheinungsort nicht ermittelbar] : American Institute of Physics, 2022)
    High-resolution large-eddy simulation (LES) is exploited to study indoor air turbulence and its effect on the dispersion of respiratory virus-laden aerosols and subsequent transmission risks. The LES modeling is carried ...
  • Impact of surface roughness on the turbulent wake flow of a turbine blade 
    Mulleners, Karen; Gilge, Philipp; Hohenstein, S. (London : Hindawi Limited, 2014)
    Roughened aeroengine blade surfaces lead to increased friction losses and reduced efficiency of the individual blades. The surface roughness also affects the wake flow of the blade and thus the inflow conditions for the ...
  • Influence of turbulence on the drop growth in warm clouds, Part II: Sensitivity studies with a spectral bin microphysics and a Lagrangian cloud model 
    Riechelmann, Theres; Wacker, Ulrike; Beheng, Klaus D.; Etling, Dieter; Raasch, Siegfried (Stuttgart : Gebrueder Borntraeger Verlagsbuchhandlung, 2015)
    Raindrops in warm clouds grow faster than predicted by classical cloud models. One of the possible reasons for this discrepancy is the influence of cloud turbulence on the coagulation process. In Part I (Siewert et al., ...
  • Innovative Strategies for Observations in the Arctic Atmospheric Boundary Layer (ISOBAR)-the Hailuoto 2017 campaign 
    Kral, Stephan T.; Reuder, Joachim; Vihma, Timo; Suomi, Irene; O'Connor, Ewan; Kouznetsov, Rostislav; Wrenger, Burkhard; Rautenberg, Alexander; Urbancic, Gabin; Jonassen, Marius O.; Båserud, Line; Maronga, Björn; Mayer, Stephanie; Lorenz, Torge; Holtslag, Albert A.M.; Steeneveld, Gert-Jan; Seidl, Andrew; Müller, Martin; Lindenberg, Christian; Langohr, Carsten; Voss, Hendrik; Bange, Jens; Hundhausen, Marie; Hilsheimer, Philipp; Schygulla, Markus (Basel : MDPI AG, 2018)
    The aim of the research project "Innovative Strategies for Observations in the Arctic Atmospheric Boundary Layer (ISOBAR)" is to substantially increase the understanding of the stable atmospheric boundary layer (SBL) through ...
  • Large eddy simulation using the general circulation model ICON 
    Dipankar, Anurag; Stevens, Björn; Heinze, Rieke; Moseley, Christopher; Zängl, Günther; Giorgetta, Marco; Brdar, Slavko (Hoboken : Blackwell Publishing Ltd, 2015)
    ICON (ICOsahedral Nonhydrostatic) is a unified modeling system for global numerical weather prediction (NWP) and climate studies. Validation of its dynamical core against a test suite for numerical weather forecasting has ...
  • A large-eddy simulation study of thermal effects on turbulent flow and dispersion in and above a street canyon 
    Park, S.-B.; Baik, J.-J.; Raasch, S.; Letzel, M.O. (Boston, Massachusetts : American Meteorological Society, 2012)
    Thermal effects on turbulent flow and dispersion in and above an idealized street canyon with a street aspect ratio of 1 are numerically investigated using the parallelized large-eddy simulation model (“PALM”). Each of ...
  • Large-eddy simulations over Germany using ICON: a comprehensive evaluation 
    Heinze, Rieke; Dipankar, Anurag; Henken, Cintia Carbajal; Moseley, Christopher; Sourdeval, Odran; Trömel, Silke; Xie, Xinxin; Adamidis, Panos; Ament, Felix; Baars, Holger; Barthlott, Christian; Behrendt, Andreas; Blahak, Ulrich; Bley, Sebastian; Brdar, Slavko; Brueck, Matthias; Crewell, Susanne; Deneke, Hartwig; Di Girolamo, Paolo; Evaristo, Raquel; Fischer, Jürgen; Frank, Christopher; Friederichs, Petra; Göcke, Tobias; Gorges, Ksenia; Hande, Luke; Hanke, Moritz; Hansen, Akio; Hege, Hans-Christian; Hoose, Corinna; Jahns, Thomas; Kalthoff, Norbert; Klocke, Daniel; Kneifel, Stefan; Knippertz, Peter; Kuhn, Alexander; Laar, Thriza van; Macke, Andreas; Maurer, Vera; Mayer, Bernhard; Meyer, Catrin I.; Muppa, Shravan K.; Neggers, Roeland A.J.; Orlandi, Emiliano; Pantillon, Florian; Pospichal, Bernhard; Röber, Niklas; Scheck, Leonhard; Seifert, Axel; Seifert, Patric; Senf, Fabian; Siligam, Pavan; Simmer, Clemens; Steinke, Sandra; Stevens, Björn; Wapler, Kathrin; Weniger, Michael; Wulfmeyer, Volker; Zängl, Günther; Zhang, Dan; Quaas, Johannes (Chichester : John Wiley and Sons Ltd, 2017)
    Large-eddy simulations (LES) with the new ICOsahedral Non-hydrostatic atmosphere model (ICON) covering Germany are evaluated for four days in spring 2013 using observational data from various sources. Reference simulations ...
  • Local convection and turbulence in the Amazonia using Large Eddy Simulation model 
    Neves, Theomar; Fisch, Gilberto; Raasch, Siegfried (Basel : MDPI AG, 2018)
    Using a high resolution model of Large Eddies Simulation (LES), named PALM from PArallel LES Model, a set of simulations were performed to understand how turbulence and convection behave in a pasture and forest sites in ...
  • The route to raindrop formation in a shallow cumulus cloud simulated by a Lagrangian cloud model 
    Hoffmann, Fabian; Noh, Yign; Raasch, Siegfried (Boston, Massachusetts : American Meteorological Society, 2017)
    The mechanism of raindrop formation in a shallow cumulus cloud is investigated using a Lagrangian cloud model (LCM). The analysis is focused on how and under which conditions a cloud droplet grows to a raindrop by tracking ...
  • Scaling the Decay of Turbulence Kinetic Energy in the Free-Convective Boundary Layer 
    El Guernaoui, Omar; Reuder, Joachim; Esau, Igor; Wolf, Tobias; Maronga, Björn (Dordrecht : Springer Netherland, 2019)
    We investigate the scaling for decaying turbulence kinetic energy (TKE) in the free-convective boundary layer, from the time the surface heat flux starts decaying, until a few hours after it has vanished. We conduct a set ...
  • Turbulent transport in the Gray Zone: A large-eddy model intercomparison study of the CONSTRAIN cold air outbreak case. 
    de Roode, Stephan R.; Frederikse, Thomas; Siebesma, A. Pier; Ackerman, Andrew S.; Chylik, Jan; Field, Paul R.; Fricke, Jens; Gryschka, Micha; Hill, Adrian; Honnert, Rachel; Krueger, Steven K.; Lac, Christine; Lesage, Andrew T.; Tomassini, Lorenzo (Washington, DC : American Geophysical Union (AGU), 2019)
    To quantify the turbulent transport at gray zone length scales between 1 and 10 km, the Lagrangian evolution of the CONSTRAIN cold air outbreak case was simulated with seven large eddy models. The case is characterized by ...
  • Vertically nested LES for high-resolution simulation of the surface layer in PALM (version 5.0) 
    Huq, Sadiq; De Roo, Frederik; Raasch, Siegfried; Mauder, Matthias (Göttingen : Copernicus GmbH, 2019)
    Large-eddy simulation (LES) has become a well-established tool in the atmospheric boundary-layer research community to study turbulence. It allows three-dimensional realizations of the turbulent fields, which large-scale ...