Fig 7 - uploaded by Mario Bedrunka
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Evolution of vorticity fields for a isotropic decaying turbulence flow for Reynolds number 30000 using several collision models.
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The lattice Boltzmann method (LBM) is an efficient simulation technique for computational fluid mechanics and beyond. It is based on a simple stream-and-collide algorithm on Cartesian grids, which is easily compatible with modern machine learning architectures. While it is becoming increasingly clear that deep learning can provide a decisive stimul...
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... 6 shows the vorticity evolution and energy spectrum for an isotropic decaying turbulence simulation at a Reynolds number of 30000 [37]. Although trained on a different flow, the neural collision model reproduced the vortex field far better, while other collision models were either unstable or overly dissipative, as shown in Figure 7. The BGK model was not able to handle the high Reynolds number and introduced unphysical small-scale oscillations. ...
