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Secretariat – Math Department

Institute for Applied and Numerical Mathematics 2
Building 20.30 Room 3.012

Englerstraße 2
D-76131 Karlsruhe

Find us on the Campus Plan

Office hours:
Mon. - Thu.: 10:00-11:30

Tel.: +49 721 608 42680

E-mail: contact@lbrg.kit.edu

Secretariat – Process Engineering Department

Institute for Mechanical Process Engineering and Mechanics
Building 30.70 Room 205

Straße am Forum 8
D-76131 Karlsruhe

Find us on the Campus Plan

Office hours:
Mon. - Fri.: 9:00-12:00

Tel.: +49 721 608 42401

E-mail: contact@lbrg.kit.edu

News Archive


OpenLB paves the way to „overnight“ near-wall-modeled large eddy simulations

Marc In a collaboration of the Lattice Boltzmann Research Group (LBRG) at the Karlsruhe Institute of Technology (KIT) and the Institute of Reactive Flows and Diagnostics of the department of Mechanical Engineering (RSM) at the Technical University of Darmstadt, the capabilities of two open source near-wall-modeled large eddy simulation (NWM-LES) approaches were investigated to predict complex turbulent flows relevant to internal combustion (IC) engines.

Therefore, OpenLB was compared to the commonly applied open source tool OpenFOAM, using a highly precise particle image velocimetry measurement as reference. The comparison covers prediction accuracy, computational costs and ease of use.

The performance results show that the OpenLB approach is on average 32 times faster than the OpenFOAM implementation for the tested configurations. The faster calculation speed for NWM-LES using the lattice Boltzmann method implementation in OpenLB is advantageous to address industrial applications and to enable "overnight" calculations that previously took weeks.

Checkout our recent publication for more details.


How face masks and ventilation of enclosed spaces can protect against infectious aerosols

KIT researchers are investigating the formation, detection, distribution and separation of gas-borne particles and droplets as well as the effectiveness of filters. Using simulations, they analyze aerosols, their distribution and deposition in rooms, filters and the human respiratory tract.
Read more
Read more (German Version)


Hiwi Job Available (c++ Programming)

Your job is to support the members of LBRG in their research and teaching activities by taking on increasingly complex programming tasks. This includes amongst others things:

  • Programming in C++
  • Creation of test
  • Performing validation tests
  • Documentation


  • Object-oriented programming language, ideally C++
  • Implementation of numerical methods in computer programs
  • Experience with Linux


New team member Mathilde Wu

She is working on implementing a virtual laboratory as part of the “Teaching4Future” project, in order for students to visualize and interact in VR/AR with fluid flow simulation results. She is working in the LBRG of Dr. Mathias. J. Krause. Read more


LBRG student member Marc Siodlaczek wins award for the best simulative bachelor's thesis 2019

Marc The bachelor's thesis with the title "Evaluation of the accuracy of the thermal Lattice Boltzmann method in the transition to turbulent flow", which was supervised by the LBRG, was awarded with the prize for the best simulative Bachelor's thesis by the VM-Verein.


New project „Potential for damage to fruits“ funded by BMWi via AiF/FEI starts

The research centers TU Berlin (Institute for Food Technology and Food Chemistry, Department of Food Biotechnology and Food Process Engineering) and KIT (Lattice Boltzmann Research Group) cooperate to determine the potential damage to fruits in fruit mixtures during processing. Read more


Project “Virtual Collaboration Laboratories“ funded by the state

Within the project, the team headed by Dr. Mathias J. Krause consisting of mathematicians and engineers from the Mannheim University of Applied Sciences (Prof. Dr. M. Rädle) and the Karlsruhe Institute of Technology (Prof. Dr. W. Dörfler, Prof. Dr.-Ing. H. Nirschl) is making existing VR/AR hardware technologies available for teaching to enable a modern education of students in the natural and engineering sciences.
It is one of five projects that are supported by the Ministry of Science of the State of Baden-Württemberg with funds from the digital@bw digitization strategy.


Spring School 2020 successfully finished

LBM Spring School 2020 The executive committee announces the closing of the third LBM Spring School with OpenLB Software Lab. We were happy to host 60 participants from nine countries, including five invited speakers in Berlin, Germany. This year’s poster award goes to Dominik Wilde et al. from the University of Siegen, Germany.
Next year, the 5th spring school (https://www.openlb.net/spring-school-2021/) in planned to take place at the University of Greenwich in England/UK form 2021 May 31st to June 4th.

On behalf of the spring school executive committee, Nicolas Hafen, Mathias J. Krause, Harald Kruggel-Emden, Christopher McHardy, Cornelia Rauh, Holger Stark, Robin Trunk


New team member Jan Marquardt

He is working on the simulation of particle-laden fluid flows in a collaboration of LBRG with the group Process Machines (Link) of Prof. Dr.-Ing Hermann Nirschl. Read more


Workshop in Porto Alegre/ Brazil Successfully Finished

Workshop Brazil LBM Workshop with OpenLB Software Lab in Brazil Successfully Finished. The executive committee announces the closing of the LBM Workshop with OpenLB Software Lab at UFRGS in Porto Alegre, Brazil. We were happy to host 35 participants including five speakers from LBRG (KIT, Karlsruhe, Germany). The workshop took place in the framework of the Brazilian-German PROBRAL project “Mesoscopic Molecular Dynamics Simulations: Development of Models andComputational Strategies for Complex Structural Bioinformatics Problems” supported by CAPES and DAAD. On behalf of the workshop executive committee, Marcio Dorn, Mathias J. Krause,Stephan Simonis.


Pre-Christmas get-together of the LBRG

Weihnachtstreffen Christmas meeting: The pre-Christmas celebration was attended by graduate workers, Hiwis and PhDs and former employees.


Registration Open for the Fourth Spring School on Lattice Boltzmann Methods with OpenLB Software Lab.

Read more on the OpenLB website


The international workshop “Data-driven Modeling and Optimization in Fluid Mechanics“ successfully finished.

Workshop It focused on the application of artificial intelligence, machine learning, deep learning, evolutional algorithms and adjoint-based optimization to fluid dynamics-related problems with special focus on turbulent flows and flow control. The executive committee were happy to host 95 participants from 11 countries and 3 continents, including 11 speakers in Karlsruhe, Germany. The workshop was organised under the patronage of the “MathSEE“ Centre of the Karlsruhe Institut of Technology and sponsored by - KIT-centre MathSEE - DFG Priority Program 1881 - DFG Colaborative Research Center/Transregio 150 The organisation of workshop was supported by Institute of Fluid Mechanics and Lattice Boltzmann Research Group at KIT.


International Workshop on Data-driven Modeling and Optimization in Fluid Mechanics

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LBRG at the open-day of the KIT

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OpenLB release 1.3 available

Read more on the OpenLB website


New project started: Thermal Comfort Evaluation by Lattice Boltzmann Simulations, Industry funded


New project started: Fundamental investigation of particle-layer rearrangement in ceramic wall flow filters by resolved particle simulations, DFG funded

Read more


OpenLB at PowTech 2019, Nürnberg Germany (April 9th to 11th)

MesseOur Virtual Reality (VR) approach for process engineering applications shows OpenLB’s latest simulation results. In the VR presentation an observer can explore the data in a room filling virtual reality with VR glasses and controller.

Read more about our VR visualuation approach at https://www.openlb.net/vrar-visualization.


New project started: Mesoscopic Molecular Dynamics Simulations - Development of Models and Computational Strategies for Complex Structural Bioinformatics Problems

Read more


International Spring School at Mannheim University of Applied Sciences - With High-Performance Computers on the Way to the Digital Twin

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New project: Mesoskopische Molekulardynamik Simulationen (MMD), DAAD ProBral Brasilien-Deutschland Initiative (2019-2020)


Apply now for scholarship the third spring school Lattice Boltzmann Methods with OpenLB Software Lab will take place 18-22 February 2019 in Mannheim. Until 14 December KIT students can apply for a participation scholarship by sending an e-mail with your CV to us.


Registration Open for the Third Spring School on Lattice Boltzmann Methods with OpenLB Software Lab.

Read more on the OpenLB website


Research to Business presents applied mathematics: Prof. Dr. Hermann Nirschl and Dr. Mathias J. Krause digitize particle streams in process engineering using numerical simulation and help to optimize industrial processes.

Read more


Trailer shows simulations done with OpenLB.

Watch it on the OpenLB Youtube channel


LBRG presents their Virtual Reality approach for process engineering applications at Achema 2018, Frankfurt Germany (June 11th to 15th, Hall 9.2 A80)

Read more on the OpenLB website


LBM Spring School with OpenLB Software Lab successfully finished

Read more on the OpenLB website


OpenLB release 1.2 available

Read more on the OpenLB website


New team member Nicolas Hafen

He is working on the simulation of particulate fluid flows in gas particle systems in a collaboration of LBRG with the group Gas Particle Systems of Prof. Dr.-Ing Achim Dittler. Read more


Registration for Proseminar Mathematische Algorithmen open

more information


Registration Open for the Second Spring School on Lattice Boltzmann Methods with OpenLB Software Lab

Registration is now open for the spring school Lattice Boltzmann Methods with OpenLB Software Lab that will be held in Karlsruhe, Germany, from March 19th to March 23th. The spring school introduces scientists and applicants from industry to the theory of LBM and trains them on practical problems. The first half of the week is dedicated to the theoretical fundamentals of LBM up to ongoing research on selected topics. This is followed by mentored training on case studies using OpenLB in the second half, where the participants gain deep insights into LBM and its applications. This educational concept is probably unique in the LBM community and offers a comprehensive and personal guided approach to LBM. Participants also benefit from the knowledge exchange during poster session, coffee breaks and an excursion. We look forward to your participation.

Mind that the number of participants is limited and that the registration follows a first come first serve principle.

Registration: https://www.openlb.net/spring-school-registration
More information: https://www.openlb.net/spring-school-2018

On behalf of the spring school executive committee, Ezeddine Sediki, Mathias J. Krause, Mahdi Tekitek, Albert Mink.


OpenLB Community YouTube Channel Update

New VideoA new video shows the results of a famous benchmark problem in CFD. The lid driven cavity problem illustrates a flow in a cuboid. The top wall moves from left to right with a constant velocity, while the other walls are fixed. The fundamental feature of this often studied fluid flow problem is the formation of a large primary vortex in the center and two smaller vortices near the two lower edges. Different techniques are applied to visualize the fluid flow including the vortices with the cavity. The source code of this simulations can be found in the examples section of the latest release of OpenLB. You will find more information in our show case section.

If you have a nice video which you have obtained with OpenLB, please let us know and we will link it or upload it. Please contact us.