Introduction to Lattice Boltzmann Method @ Nasa Glenn 2013

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Short introductory lecture to lattice Boltzmann with applications.
** English Captions ** Sous-Titres en Français ** 中国字幕 **
One of the new big players in Computational Fluid Dynamics, the lattice Boltzmann method can appear a bit puzzling at first sight. This short course attempts to provide some context and fundamental knowledge. It presents the origins and the mathematical foundations of the method and provides insights into parallelism and GPGPU programming. Application examples of the open-source lattice Boltzmann code Palabos are provided to illustrate the concepts:
- Axial pump in multi-phase water-air system.
- Thermal convection in buildings.
- Haemodynamics in an artery with aneurysm and blood clotting.
- Swirling spray fluid atomizer, with fully resolved breakup.
- Turbulent channel flow with LES model.

Not into video tutorials? Check out our lattice Boltzmann intro page:

Thanks to Hui Xu for his help on Chinese captions. More Chinese-language lattice Boltzmann content on his blog:

Lattice Boltzmann is easy. 1-page Python script:

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The low Mach-number restriction is like a CFL condition for the LB method. The speed of sound is around unity in lattice units, and common lattice Boltzmann models are thus restricted to low Mach number: they are nearest-neighbor schemes and information travels at a speed below unity. With a high-order Hermite tensor expansion you get however schemes with a larger stencil, and therefore the possibility to simulate supersonic flows. More information in the reference cited at 14:15 in the lecture.

FlowKitLtd

What are the benefits of using the LBM compared to using the FVM?

RelatedGiraffe

Some results of Palabos simulations of stented arteries are listed on the web page of the Thrombus project, thrombus-vph.eu .

FlowKitLtd

Thank you for posting this video! I too would like more information about using LBM for MACH numbers between 0 and 2.0.

sstevenson

Isn't there a limitation wrt to LBM method, can they be used to solve high Mach number flows? M > 1?

ngc

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