More images and animations generated with Palabos (or with its predecessor OpenLB) are presented on the LBMethod.org web site.
| A von Karman vortex street is generated in this 2D flow past a cylinder. The flow is in an unsteady yet periodic regime, as you discover by clicking on the picture and watching the animation. |
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In this flow past a backward facing step, a main vortex appears right behind the step, and a secondary vortex close to the top wall. This flow is unsteady, and its 3D structure is visualized at a given moment in time with the help of stream lines. |
| In this example taken from geophysics, a multi-phase flow through a porous media is simulated. Bubbles of a hot gas, embedded in a liquid media, raise under the influence of buoyancy and percolate through a porous media. As the rate at which bubbles are generated exceeds their percolation rate through the pores, a gas chamber is formed right below the porous media. |
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Rayleigh-Benard convection is simulated in this example of a thermal flow, confined between a hot wall at the bottom, and a cold wall at the top. While this setup leads to stationary convection rolls at low Rayleigh number, it enters a turbulent regime at high Rayleigh values, as observed on this picture. |
| Palabos has the ability to generate complex fluid domains from a surface description of the geometry provided in an STL file. The flow data is stored in a multi-block structure, as it is illustrated here on the example of a blood flow simulation in a human artery . The blood vessel is covered up by a certain number of contiguous blocks. The more blocks are used, and the less memory is wasted for unused fluid nodes. This data structure is used not only to save memory, but also to achieve parallelism, as the blocks are assigned to different processes in a parallel machine. |
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