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In this work, we study numerically the convergence of the scalar D2Q9 lattice Boltzmann scheme with multiple relaxation times when the time step is proportional to the space step and tends to zero. We do this by a combination of theory and numerical experiment. The classical formal analysis when all the relaxation parameters are fixed and the time...
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... this case, the damped acoustic model (38) exhibits a non-propagative mode. The initial condition is presented in Figure 9. The autocorrelation of density ...
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Citations
... In consequence, industrial applications at high Reynolds number are used in automotive industry [20] since 20 years and are in development for transonic aerodynamics [21]. Nevertheless, we have reported in [22,23] an unexpected convergence previously observed in [17] for the heat equation when the time and space steps tend to zero with a fixed ratio λ ≡ ∆x ∆t . The thermal diffusion coefficient evaluated with the Taylor expansion method µ ≃ 1 s − 1 2 λ ∆x remains constant and ∆x tends to zero. ...