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hal.structure.identifierInstitut de Mathématiques de Bordeaux [IMB]
dc.contributor.authorDECHRISTÉ, Guillaume
hal.structure.identifierInstitut de Mathématiques de Bordeaux [IMB]
dc.contributor.authorMIEUSSENS, Luc
dc.date.accessioned2024-04-04T03:21:40Z
dc.date.available2024-04-04T03:21:40Z
dc.date.created2012
dc.date.issued2012-05-23
dc.date.conference2012-06
dc.identifier.issn1742-6596
dc.identifier.urihttps://oskar-bordeaux.fr/handle/20.500.12278/194676
dc.description.abstractEnWe present a numerical method for computing unsteady rarefied gas micro flows, in domains with moving boundaries, in view of applications to complex computations of moving structures in micro or vacuum systems. The flow is described by the Bhatnagar-Gross-Krook (BGK) model of the Boltzman equation. A standard approach to simulate incompressible viscous flows with moving boundaries is the immersed boundary method. In this work, we propose an extension of this approach to a deterministic simulation of rarefied flows. The immersed boundary approach consists in keeping the same mesh all along the calculation: every cell of the mesh remains fixed for all time steps while the domain occupied by the gas changes. This strategy avoids to use moving meshes and remeshing approaches, and should be easily applied to problems with complex geometries. The method has been tested with both specular and diffuse boundary conditions and has been validated on several 1D problems (moving piston, actuator, etc.). Up to our knowledge, this is the first time that a deterministic simulation method for rarefied flows with moving obstacles based on the immersed boundary method is presented.
dc.language.isoen
dc.publisherIOP Science
dc.source.title1st European Conference on Gas Micro Flows (GasMems 2012) 6-8 June 2012, Skiathos, Greece
dc.title.enNumerical simulation of micro flows with moving obstacles
dc.typeCommunication dans un congrès
dc.identifier.doi10.1088/1742-6596/362/1/012030
dc.subject.halMathématiques [math]/Analyse numérique [math.NA]
bordeaux.journalJournal of Physics: Conference Series
bordeaux.page012030
bordeaux.volume362
bordeaux.hal.laboratoriesInstitut de Mathématiques de Bordeaux (IMB) - UMR 5251*
bordeaux.institutionUniversité de Bordeaux
bordeaux.institutionBordeaux INP
bordeaux.institutionCNRS
bordeaux.conference.title1st European Conference on Gas Micro Flows (GasMems 2012)
bordeaux.countryGR
bordeaux.title.proceeding1st European Conference on Gas Micro Flows (GasMems 2012) 6-8 June 2012, Skiathos, Greece
bordeaux.conference.citySkiathos
bordeaux.peerReviewedoui
hal.identifierhal-01024309
hal.version1
hal.invitednon
hal.proceedingsoui
hal.popularnon
hal.audienceInternationale
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-01024309v1
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