Abstract
The problem of fluid compressibility in the ordinary approach to lattice Boltzmann (LB) according to the BGK method is analyzed. A new velocity is introduced besides the usual one, linked to this later by a dimensionless mass density. The LBGK method based on this second velocity, with a suitable second order equilibrium distribution (different from the ordinary one), leads to the real Navier–Stokes equation of incompressible fluids under the steady mass density condition.
This approach is compared with two well known methods one can found in literature. Finally, the role of the approach introduced here and of the ordinary one with respect to Poiseuille flow simulation is presented.
This work has been supported by M.I.U.R. COFIN project “Formal Languages and Automata: Theory and Application”
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© 2004 Springer-Verlag Berlin Heidelberg
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Cattaneo, G., Dennunzio, A., Farina, F. (2004). Lattice Boltzmann Approach to Incompressible Fluidynamics Dimensional Investigation and Poiseuille Test. In: Sloot, P.M.A., Chopard, B., Hoekstra, A.G. (eds) Cellular Automata. ACRI 2004. Lecture Notes in Computer Science, vol 3305. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-540-30479-1_90
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DOI: https://doi.org/10.1007/978-3-540-30479-1_90
Publisher Name: Springer, Berlin, Heidelberg
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