Abstract
Coarse grid lattice Boltzmann models (LBM) and computational fluid dynamics (CFD) are compared in building simulations. Three simulations are used to assess the different numerical models: (i) a 2D isothermal flow case, (ii) a 3D isothermal flow case and (iii) a 2D non-isothermal flow case. Both models predicted the correct flow patterns and temperature field and could be used for real time (RT), near real time (NRT) and faster than real time (FRT) simulations without loss of accuracy on multi-core processors. The results indicate that the coarse grid CFD is both faster and more time accurate than the LBM for unsteady simulations.
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Elhadidi, B., Khalifa, H.E. Comparison of coarse grid lattice Boltzmann and Navier Stokes for real time flow simulations in rooms. Build. Simul. 6, 183–194 (2013). https://doi.org/10.1007/s12273-013-0107-x
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DOI: https://doi.org/10.1007/s12273-013-0107-x