The PALM group at IMUK

Our research focusses on studies of micro- and mesoscale turbulent atmospheric boundary layers using LES. Current projects are listed below. Other parts of our work include advancements of our simulation system PALM, in particular the development of highly scalable and parallelized methods for all parts of the simulation process chain (numerics, I/O, and visualization).

Our research group (July 2011) in front of some of the nodes of the  HLRN SGI-Altix machine. From left to right: Back: Christoph Knigge, Markus Fuhrmann, Fabian Hoffmann, Jens Fricke, Micha Gryschka, Björn Maronga, Siegfried Raasch Front: Matthias Sühring, Rieke Heinze, Carolin Helmke, Farah Kanani, Sonja Drüke, Theres Riechelmann, Marius Keck (Photo: G. Gaus,  HLRN)

Members Name Email Room Böske, Lennart 2396 F210 Drüke, Sonja 3232 F233 Fricke, Jens 3232 F233 Fuhrmann, Markus 2396 F210 Gryschka, Micha 3254 F236 Heinze, Rieke 4413 F225 Herbort, Florian 4413 F225 Hoffmann, Fabian 2396 F210 Kanani, Farah 3232 F233 Keck, Marius 3232 F233 Knigge, Christoph 2680 F221 Maronga, Björn 2680 F221 Raasch, Siegfried 3253 F231 Riechelmann, Theres 2680 F221 Schulz, Hannes 2396 F210 Sühring, Matthias 4413 F225 A list of all former members can be found here.

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Contact

Leibniz Universität Hannover
Institut für Meteorologie und Klimatologie
PALM group
Herrenhäuser Str. 2
30419 Hannover
Germany

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Projects

Short description in chronological order, sorted by starting date:

Current Projects

2012:

• The impact of entrainment and mixing on the fine-structure of cloud turbulence (details)

2010:

• High-resolution LES studies of the turbulent exchange processes inside a forest and the forest-atmosphere interactions under heterogeneous conditions (details)

• Analysis of the relative importance of terrain heterogeneity, heterogeneous land use and heterogeneous forcing on the ABL structure using LES (details)

• The influence of clouds on secondary circulation triggered by surface heterogeneities (details)

• Investigation of entrainment processes at the top of the atmospheric boundary layer using innovative experimental and numerical techniques (details)

• Representation of the convective atmospheric boundary layer during cold-air outbreaks in regional models: a joined study based on observations, Large Eddy Simulation and mesoscale modelling (details)

• High-resolution LES studies of the turbulent structure of the lower atmospheric boundary layer over heterogeneous terrain and implications for the interpretation of scintillometer data (details)

• Coriolis instability in coupled atmosphere-ocean LES (details)

2009:

• LES of atmospheric boundary layer turbulence - contributions to the improvement of turbulence parameterisation schemes by means of systematic studies of higher order statistical moments and their budgets (details )

2008:

• Numerical simulation of the interaction between the atmosphere and the wing circulation (details)

• Investigations on in-cloud turbulence effects on drop growth and precipitation formation (details)

2007:

• Coupled atmosphere-ice-ocean turbulence resolving model (details)

• The physics of turbulence over antarctic leads and polynyas and its parameterization: A joint study using observations, LES and a micro-/mesoscale model (details)

Finished Projects

2009:

• Footprint modelling via LES for the LITFASS-2003 measuring campaign (details)

• Development of a higher order advection scheme and its implementation in PALM (details)

• Influence of small scale heterogeneities on the near surface turbulence structure (details)

• Investigations of self organized and forced roll convection during a cold air outbreak with LES (details)

• LES study on the effect of secondary circulations on the boundary layer turbulence during LITFASS-2003 (details)

• Scalar transfer process of the urban canopy (details)

2008:

• LES of Kármán vortex streets in the atmospheric boundary layer (details)

• LES study on the applicability of the Taylor hypothesis in the urban boundary layer (details)

• Study of the turbulence intensity in a wind turbine wake with the aid of LES (details)

2007:

• LES of quarters in Hong Kong (details)

• Turbulence structure in the urban roughness sublayer: LES reference studies and comparison with data from wind tunnel, scale model and field measurements (details)

2006:

• Large-eddy simulation of flow and pollutant dispersion in street canyons (details)

• Large-eddy simulation of the surface boundary layer for wind energy applications (details)

• LES of dust devils (details)

• Urban dispersion modelling using parallel large-eddy simulation (details)

2005:

• Footprint model development and validation for homogeneous and inhomogeneous terrain using high resolution large-eddy simulation (details)

• Large-eddy simulation of oceanic turbulence and its application to the parameterization of vertical mixing (details)

• LES of a cumulus cloud with explicit Lagrangian droplets (details)

2004:

• LES study of the spatial representativeness and imbalances of scalar fluxes determined by the temporal EC method (details)

2003:

• Monte-Carlo-simulation of radiation transfer through an inhomogeneous cloud layer (details)

• Investigation of physical mechanisms leading to cell broadening and organization of convection in cold air outbreaks utilizing high resolution LES model simulations (details)

• Development of a large-eddy simulation model for the ocean mixed layer and its application to the process of mass transport in the ocean (details)

• Further LES-study on the energy imbalance problem with eddy covariance fluxes (details)

• LES-study on the energy imbalance problem for heterogeneous surfaces (details)

• High resolution LES of turbulent flow in the vicinity of buildings including thermal effects (details)

• Large-eddy simulations of boundary layer flows (HOST programme) (details)

• LES of suspended particle dispersion in the ocean mixed layer (details)

• Investigation of coherent structures in the surface layer with the help of highly-resolved LES data (details)

2002:

• Large-eddy simulation of cold air outbreaks with a stationary domain (details)

• Coupling of LES models of different spatial resolution performing on massively parallel computers (details)

• Regional evaporation at grid / pixel scale over heterogeneous land surfaces (EVA-GRIPS) - numerical investigation of turbulent structures over heterogeneous land surfaces with a parallelized LES model (EVA-NITS) (details)

2001:

• The influence of two-dimensional surface heterogeneities on the structure and development of the atmospheric boundary layer (details)

• Vertical transports of energy and trace gases at anchor stations and their spatial and temporal extrapolation under complex natural conditions (VERTIKO) - structure of turbulent fluxes under inhomogeneous surface conditions (STINHO) - simulation of boundary layer turbulence (details)

• LES study of the energy imbalance problem with eddy covariance fluxes (details)

• Application of tele-immersion in wide area networks (details)

2000:

• Development of a high performance parallel large-eddy simulation model and its application to the atmospheric boundary layer (details)

• Development of a multigrid-scheme in order to solve elliptic differential equations on massivly parallel computers and its implementation in the LES model PALM (details)

• Large-eddy simulations of thermally-induced circulations in the convective boundary layer (details)

1999:

• First attempts of the validation of an LES model by acoustic tomography data (details)

1998:

• Investigation of the evolution of organized convection during a cold air outbreak using a parallelized large-eddy simulation model (details)

1996:

• LES of the atmospheric boundary layer over water surfaces partially covered with sea-ice (details)

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