Skip to content

Author: Tim Pertzel

OpenLB paper is ranked 5th on the list of top cited articles in Computers & Mathematics with Applications

We are proud to share that our paper “OpenLB—Open source lattice Boltzmann code” ( is ranked 5th on the list of “Top cited articles published in the past 3 years” in the journal Computers & Mathematics with Applications (IF 2.9, SJR Q1 in “Modeling and Simulation” and in “Computational Theory and Mathematics”).

By the way, out of the first five articles in this list, two are on LBM-based software!

In addition, within the list of “The most downloaded articles in the last 90 days” our paper is ranking 6th. Three out of the first six papers in this list use #LBM.

Thank you to the community for citing us, to the team, the co-authors, the co-developers, and especially to Mathias J. Krause for leading the development of #OpenLB in the past years. 



LBM Spring School in Greenwich successfully finished

The executive committee is happy to announce the closing of the 6th LBM Spring School with OpenLB Software Lab. We hosted 50 participants from 15 countries this year. Congratulations to Martijn Gobes from the Netherlands for winning our poster award.

We are already busy planing next years spring school. The 7th spring school is planned to take place in Heidelberg/Karlsruhe in Germany from March 4th to 8th 2024. 

Thank you all for attending the 6th spring school in Greenwich!

On behalf of the spring school executive committee.

OpenLB Community YouTube Channel Update

We have just released a new video on our OpenLB YouTube Channel about Multi-GPU Simulation of Turbulent Mixing Using an LES Lattice Boltzmann Model and OpenLB.

Accurate simulations of species transport and mixing with reactions in fluids are a grand challenge in CFD because they require resolving relevant turbulent structure down to the Bachelor scales. We present here our first results for our approach on simulating turbulent confined impinging jets (CIJ) micromixer [Johnson & Prud’homme 2003]. With the help of OpenLB ( it is now possible to perform an LES-Lattice Boltzmann Method of that case with a newly developed stabilized species transport. The two turbulent inlets are set up with the vortex method and the wall is mapped with a Bouzidi ansatz for a higher precision. The simulation is meshed in parallel in OpenLB with 248 millions cells which are load-balanced and distributed to 24 A100 GPUs of the HoreKA cluster at KIT. The simulation has taken 40 hours to complete 5.4 ms of real time (17.4 residence times). Two species are simulated but only one is visualized.

Simulation & Visualization: Fedor Bukreev, Adrian Kummerländer

Spring School 2023 in Greenwich/London (UK) – Register Now

Registration is now open for the Sixth Spring School on Lattice Boltzmann Methods with OpenLB Software Lab that will be held in Greenwich/London, UK from 5th to 9th of June 2023. 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. 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 offers a comprehensive and personal guided approach to LBM. Participants also benefit from the knowledge exchange during the poster session, coffee breaks, and the excursion. We look forward to your participation.

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

On behalf of the spring school executive committee, Nicolas Hafen, Mathias J. Krause, Jan E. Marquardt, Timothy Reis, Choi-Hong Lai, Tao Gao, Andrew Kao

OpenLB Community YouTube Channel Update

We have just released a new video on our OpenLB YouTube Channel. 

Simulation of a breaking dam using the free surface model included in OpenLB 1.5.

Free surface implementation by Claudius Holeksa, example case and visualization by Maximilian Schecher.

Highly-resolved Nozzle Simulation Performed Using Multi-GPU Support

We have just released a new video on our OpenLB YouTube Channel. 

In order to showcase the usability and performance of OpenLB’s GPU support, a turbulent nozzle flow was simulated on the HoreKa (KIT, Germany) supercomputer. This case was adapted for higher resolution from the turbulence/nozzle3d example included in OpenLB 1.5. It utilizes a Smagorinsky LES model for the bulk flow and non-local interpolated boundaries for the in- and outflow conditions on top of a single-precision D3Q19 lattice. The simulation’s 2.5 billion cells were computed on 120 Nvidia A100 GPUs divided into 30 nodes. This resulted in a performance of ~250 billion cell updates per second. ParaView was utilized to generate the visualization.

Simulation and Visualization: Adrian Kummerländer

2nd Call for the Fifth Spring School – Early Bird by 10th of May

Early bird registration is open until the 10th of May 2022 for the Fifth Spring School on Lattice Boltzmann Methods with OpenLB Software Lab. It is held in Kraków, Poland, from 6th to 10th of June 2022. The school offers a special lecture on LBM on high performance computers and, for the first time, using GPUs with OpenLB (v. 1.5).

On behalf of the spring school executive committee