Lattice-Boltzmann coupled models for advection-diffusion flow on a wide range of Péclet numbers
| Autor: | Dapelo, Davide, Simonis, S., Krause, J.J., Bridgeman, John |
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| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: | |
| Druh dokumentu: | Článek |
| DOI: | 10.1016/j.jocs.2021.101363 |
| Popis: | Yes Traditional Lattice-Boltzmann modelling of advection–diffusion flow is affected by numerical instability if the advective term becomes dominant over the diffusive (i.e., high-Péclet flow). To overcome the problem, two 3D one-way coupled models are proposed. In a traditional model, a Lattice-Boltzmann Navier–Stokes solver is coupled to a Lattice-Boltzmann advection–diffusion model. In a novel model, the Lattice-Boltzmann Navier–Stokes solver is coupled to an explicit finite-difference algorithm for advection–diffusion. The finite-difference algorithm also includes a novel approach to mitigate the numerical diffusivity connected with the upwind differentiation scheme. |
| Databáze: | Networked Digital Library of Theses & Dissertations |
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