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Spring School 2020

4th Spring School

Lattice Boltzmann Methods
with OpenLB Software Lab

9.-13. March 2020
Berlin, Germany

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Executive committee

  • Nicolas Hafen, Karlsruhe Institute of Technology, Germany
  • Mathias J. Krause, Karlsruhe Institute of Technology, Germany
  • Harald Kruggel-Emden, Technische Universität Berlin, Germany
  • Christopher McHardy, Technische Universität Berlin, Germany
  • Cornelia Rauh, Technische Universität Berlin, Germany
  • Holger Stark, Technische Universität Berlin, Germany
  • Robin Trunk, Karlsruhe Institute of Technology, Germany

The field of Lattice Boltzmann Method

In recent years, Lattice Boltzmann Methods (LBM) turned into an established numerical tool for computational fluid dynamic (CFD) problems and beyond. The simulation of complex multi-physical problems benefits strongly from the comprehensive mesoscopic modelling underlying LBM and establishes LBM besides traditional numerical methods.

Target audience

The expected attendees are developers and researchers, from industry and academia interested to learn theoretical and practical aspects of LBM. The spring school addresses e.g. engineers, computer scientists, mathematicians and physicists as well as Master and PhD students. The course level is beginners in LBM. Based on their interest in CFD, this course provides a collaborative platform for LBM, both for developers and researchers.

Objective of the spring school

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 of the week, the participants gain deep insights into LBM and its applications. Emphasis is placed on the modelling and simulation of particulate fluid flows.

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.

Lab room and requirements

In the computing lab sessions on Thursday and Friday, the participants are trained on practical applications, deploying the open source software OpenLB. Particular focus is placed on case studies, which are important to understand and verify the theory presented in the lectures, earlier in the spring school. By the help of experienced tutors, the computing lab sessions also enable to set up OpenLB simulations for relevant problems. To guaranty personal tutoring and intensive exchange between experienced mentors and novices, the lab is limited to 50 participants.

The attendees are responsible to bring their own laptop equipped with the software

  • GNU c++ compiler 5.0, clang compiler 3.4, icc compiler 17.0 or higher
  • OpenMPI 1.6 and higher
  • Paraview

Windows users prepare their laptop in advance following the Technical Report 4 or 5 (


  • Timm Krüger, The University of Edinburgh, United Kingdom
  • Sam Avis, Halim Kusumaatmaja, Durham University, United Kingdom
  • Timothy Reis, University of Greenwich, United Kingdom
  • Max Gaedtke, Nicolas Hafen, Marc Haussmann, Fabian Klemens, Mathias J. Krause, Albert Mink, Stephan Simonis, Robin Trunk, Karlsruhe Institute of Technology, Germany
  • Christopher McHardy, Simon Reinecke, Tony Rosemann, Technische Universität Berlin, Germany
  • Christoph Rettinger, Friedrich-Alexander-Universität Erlangen-Nürnberg, Germany

Course delivery

Printed lecture notes, lectures by invited speakers, software lab mentored by OpenLB developers, 5x lunch, 2x dinner (including Spring School dinner), social excursion, all coffee breaks, certificate of participation

Open workshop of DFG SFB 910 and SPP 2045

The spring school is organized as open workshop being included in the DFG programs SFB 910 as well as SPP 2045. It promotes the participants of the programs in the first place, but is open for the interested general public. The spring school is organized as a non-profit event.


 Early registration

(by 10. February 2020)

Regular registration
Academia€ 350€ 500
Industry€ 1.700€ 1.850

Poster session award

The award is aiming at supporting excellent students working in the field of LBM.

Program — LBM Theory

09:00Opening, LBM for application
Mathias J. Krause, Christopher McHardy
Turbulence models
Marc Haußmann
10:00Coffee breakCoffee break
10:30Short introduction by participants
all participants
Thermal flows
Max Gaedtke, Tony Rosemann
11:30Introduction to LBM
Timothy Reis
Multi-phase and multi-component flows
Halim Kusamaatmaja
12:30Lunch breakLunch break
14:00Boundary conditions
Timothy Reis
Particulate flows
Jan Marquardt, Simon Reinecke, Robin Trunk
Timm Krüger
Application of particulate flows
Timm Krüger
16:00Coffee breakCoffee break
16:30Analysis of LBM
Stephan Simonis
Radiative transport 
Christopher McHardy
Efficient parallel implementation
Adrian Kummerländer
Grid refinement for LBM
Christoph Rettinger
17:30Poster session and dinnerFree, optional:
Introduction to linux terminal (15 min),
help desk in order to get OpenLB running on your laptop

Program — OpenLB Software Tutorial

09:001 Introduction
Basic concepts, Functors, performance, validation
3.2 Prepare geometry
Functors, meshing, material numbers
Exercise 2: Prepare geometry
Advanced models I
Online documentation, Doxygen
10:00Coffee breakCoffee breakCoffee break
10:302 Preliminaries
OpenLB setup, VTK output, Paraview, documentation
3.3 Prepare lattice
Descriptor and Dynamics, external fields
Advanced models II
Exercises 5: Particle laden flows I 
Exercises 6: Particle laden flows II
Exercises 7: Free energy model
11:303.1 Initialisation
XML interface, unit conversion,
Exercise 1: Initialisation
3.4 Main loop with timer
Time measurement, convergence check
Closing (12:00)
12:30Lunch breakLunch breakLunch break
14:00Social event / excursion3.5 Initial and boundary conditions
Boundary objects, dynamics, types
Exercise 3: Boundary conditions
Tutorial: Applying and developing OpenLB
15:00Social event / excursion3.6 Collide & Stream
LBM Algorithms, Execution coupling, Collision, Streaming
Option 1:
OpenLB for applicants: work on your own application
16:00Social event / excursionCoffee breakOption 2:
OpenLB for developers: implement your own LB model
16:30Social event / excursion3.7 Computation & Results
console output, Functor application
Exercise 4: Get results
17:30Social event / excursion
19:00Spring school dinner

Supported by

Technische Universität Berlin
kit Karlsruhe Institute of Technology
DFG SFB 910 – Control of self-organizing nonlinear systems: Theoretical methods and concepts of application
DFG SPP 2045 – Highly specific and multidimensional fractionation of fine particle systemes with technical relevance