Deadline for registration: 15 days before the starting date of each training
Duration : 1 day / (6 hours)
For several years, a new method has emerged to solve flows numerically .
This approach called Lattice Boltzmann Method (LBM) is based on the resolution of the Boltzmann equation and not the Navier-Stokes ones (to notice: Navier-Stokes is an approximation of Boltzmann). LBM is based on gas kinetics theory; to obtain the macroscopic behavior of the fluid we work on a smaller physical scale (called mesoscopic) compared to conventional approaches.
This paradigm shift has several advantages. Boltzmann equations are simpler than the Navier-Stokes equations, this means a more compact solver, easier to write and maintain. Moreover arithmetic operations to be performed are local, this implies a high efficiency on parallel computers. But what makes this approach very promising for the future is its ability to handle very complex geometries without any difficulty.
This training aims to provide basic knowledge in the implementation of an LBM solver. This one day session will be devoted to explain the basic concept of the LBM, its implementation in a computer solver and to run (through practical work) simple applications on academic tests cases.
The aim is to provide a basic understanding of the LBM, which means that only isothermal low compressible flows will be presented. For the audience interested by a more advanced presentation of the LBM, CERFACS proposes an other training session presented by Pierre Sagaut (see the web).
PhD students, engineers, researchers
Basic knowledge in fluid mechanics and computational methods
Scientific contact : Jean-François BOUSSUGE
- Trainees/PhDs/PostDocs : 60 €
- CERFACS shareholders/CNRS/INRIA : 180 €
- Public : 360 €
- Conceptual understanding of LBM
- Derivation of the LBM equation
- Numerical aspects of the LBM equation (stream and collide approach)
Simple boundary condition
- Incorporate a forcing term
- Study of a simple LBM solver
- Application to academic test cases
Flow past a cylinder
Lid driven cavity
Double shear layer