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dc.contributor.authorMattila, Keijo
dc.contributor.authorHegele, Luiz A.
dc.contributor.authorPhilippi, Paulo C.
dc.date.accessioned2016-02-01T08:16:50Z
dc.date.available2016-02-01T08:16:50Z
dc.date.issued2015
dc.identifier.citationMattila, K., Hegele, L. A., & Philippi, P. C. (2015). Investigation of an entropic stabilizer for the lattice-Boltzmann method. <i>Physical Review E</i>, <i>91</i>(6), Article 063010. <a href="https://doi.org/10.1103/PhysRevE.91.063010" target="_blank">https://doi.org/10.1103/PhysRevE.91.063010</a>
dc.identifier.otherCONVID_24787244
dc.identifier.otherTUTKAID_66571
dc.identifier.urihttps://jyx.jyu.fi/handle/123456789/48561
dc.description.abstractThe lattice-Boltzmann (LB) method is commonly used for the simulation of fluid flows at the hydrodynamic level of description. Due to its kinetic theory origins, the standard LB schemes carry more degrees of freedom than strictly needed, e.g., for the approximation of solutions to the Navier-stokes equation. In particular, there is freedom in the details of the so-called collision operator. This aspect was recently utilized when an entropic stabilizer, based on the principle of maximizing local entropy, was proposed for the LB method [I. V. Karlin, F. Bosch, and S. S. Chikatamarla, ¨ Phys. Rev. E 90, 031302(R) (2014)]. The proposed stabilizer can be considered as an add-on or extension to basic LB schemes. Here the entropic stabilizer is investigated numerically using the perturbed double periodic shear layer flow as a benchmark case. The investigation is carried out by comparing numerical results obtained with six distinct LB schemes. The main observation is that the unbounded, and not explicitly controllable, relaxation time for the higher-order moments will directly influence the leading-order error terms. As a consequence, the order of accuracy and, in general, the numerical behavior of LB schemes are substantially altered. Hence, in addition to systematic numerical validation, more detailed theoretical analysis of the entropic stabilizer is still required in order to properly understand its properties.
dc.language.isoeng
dc.publisherAmerican Physical Society
dc.relation.ispartofseriesPhysical Review E
dc.subject.otherlattice-Boltzmann method
dc.titleInvestigation of an entropic stabilizer for the lattice-Boltzmann method
dc.typearticle
dc.identifier.urnURN:NBN:fi:jyu-201601291333
dc.contributor.laitosFysiikan laitosfi
dc.contributor.laitosDepartment of Physicsen
dc.type.urihttp://purl.org/eprint/type/JournalArticle
dc.date.updated2016-01-29T10:15:12Z
dc.type.coarjournal article
dc.description.reviewstatuspeerReviewed
dc.relation.issn1539-3755
dc.relation.numberinseries6
dc.relation.volume91
dc.type.versionpublishedVersion
dc.rights.copyright© 2015 American Physical Society. Published in this repository with the kind permission of the publisher.
dc.rights.accesslevelopenAccessfi
dc.relation.doi10.1103/PhysRevE.91.063010


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