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dc.contributor.authorMohammed, S
dc.contributor.authorGraham, D
dc.contributor.authorReis, T
dc.date.accessioned2018-09-13T09:22:04Z
dc.date.issued2018-11-15
dc.identifier.issn0045-7930
dc.identifier.issn1879-0747
dc.identifier.urihttp://hdl.handle.net/10026.1/12348
dc.description.abstract

The accuracy of moment-based boundary conditions for no slip walls in lattice Boltzmann simulations is examined numerically by using the dipole-wall collision benchmark test for both normal and oblique cases. In the normal case the dipole hits the wall perpendicularly while in the oblique case the dipole hits the wall at an angle of 30° to the horizontal. Boundary conditions are specified precisely at grid points by imposing constraints upon hydrodynamic moments only. These constraints are then translated into conditions for the unknown lattice Boltzmann distribution functions at boundaries. The two relaxation time (TRT) model is used with a judiciously chosen product of the two relaxation times. Stable results are achieved for higher Reynolds number up to 10,000 for the normal collision and up to 7500 for the oblique case. Excellent agreement with benchmark data is observed and the local boundary condition implementation is shown to be second order accurate.

dc.format.extent79-96
dc.languageen
dc.language.isoen
dc.publisherElsevier
dc.subjectLattice Boltzmann equation
dc.subjectMoment-based boundary conditions
dc.subjectTwo relaxation times
dc.subjectDipole-wall collision
dc.titleAssessing moment-based boundary conditions for the lattice Boltzmann equation: A study of dipole-wall collisions
dc.typejournal-article
dc.typeArticle
plymouth.volume176
plymouth.publication-statusPublished
plymouth.journalComputers and Fluids
dc.identifier.doi10.1016/j.compfluid.2018.08.025
plymouth.organisational-group/Plymouth
plymouth.organisational-group/Plymouth/Faculty of Science and Engineering
plymouth.organisational-group/Plymouth/REF 2021 Researchers by UoA
plymouth.organisational-group/Plymouth/REF 2021 Researchers by UoA/EXTENDED UoA 10 - Mathematical Sciences
plymouth.organisational-group/Plymouth/REF 2021 Researchers by UoA/EXTENDED UoA 10 - Mathematical Sciences/UoA 10 - Former and non-independent
plymouth.organisational-group/Plymouth/Research Groups
plymouth.organisational-group/Plymouth/Research Groups/Marine Institute
plymouth.organisational-group/Plymouth/Users by role
dcterms.dateAccepted2018-08-27
dc.rights.embargodate2019-8-28
dc.identifier.eissn1879-0747
dc.rights.embargoperiodNot known
rioxxterms.versionofrecord10.1016/j.compfluid.2018.08.025
rioxxterms.licenseref.urihttp://www.rioxx.net/licenses/all-rights-reserved
rioxxterms.licenseref.startdate2018-11-15
rioxxterms.typeJournal Article/Review


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