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dc.contributor.authorMocz, Philip
dc.contributor.authorVogelsberger, Mark
dc.contributor.authorPakmor, Rüdiger
dc.contributor.authorGenel, Shy
dc.contributor.authorSpringel, Volker
dc.contributor.authorHernquist, Lars
dc.date.accessioned2017-04-27T17:46:16Z
dc.date.available2017-04-27T17:46:16Z
dc.date.issued2015-10
dc.date.submitted2015-06
dc.identifier.issn0035-8711
dc.identifier.issn1365-2966
dc.identifier.urihttp://hdl.handle.net/1721.1/108458
dc.description.abstractA method for improving the accuracy of hydrodynamical codes that use a moving Voronoi mesh is described. Our scheme is based on a new regularization scheme that constrains the mesh to be centroidal to high precision while still allowing the cells to move approximately with the local fluid velocity, thereby retaining the quasi-Lagrangian nature of the approach. Our regularization technique significantly reduces mesh noise that is attributed to changes in mesh topology and deviations from mesh regularity. We demonstrate the advantages of our method on various test problems, and note in particular improvements obtained in handling shear instabilities, mixing, and in angular momentum conservation. Calculations of adiabatic jets in which shear excites Kelvin–Helmholtz instability show reduction of mesh noise and entropy generation. In contrast, simulations of the collapse and formation of an isolated disc galaxy are nearly unaffected, showing that numerical errors due to the choice of regularization do not impact the outcome in this case.en_US
dc.language.isoen_US
dc.publisherOxford University Pressen_US
dc.relation.isversionofhttp://dx.doi.org/10.1093/mnras/stv1598en_US
dc.rightsCreative Commons Attribution-Noncommercial-Share Alikeen_US
dc.rights.urihttp://creativecommons.org/licenses/by-nc-sa/4.0/en_US
dc.sourcearXiven_US
dc.titleReducing noise in moving-grid codes with strongly-centroidal Lloyd mesh regularizationen_US
dc.typeArticleen_US
dc.identifier.citationMocz, Philip; Vogelsberger, Mark; Pakmor, Rüdiger; Genel, Shy; Springel, Volker and Hernquist, Lars. “Reducing Noise in Moving-Grid Codes with Strongly-Centroidal Lloyd Mesh Regularization.” Monthly Notices of the Royal Astronomical Society 452, no. 4 (August 6, 2015): 3853–3862.en_US
dc.contributor.departmentMassachusetts Institute of Technology. Department of Physicsen_US
dc.contributor.mitauthorVogelsberger, Mark
dc.relation.journalMonthly Notices of the Royal Astronomical Societyen_US
dc.eprint.versionOriginal manuscripten_US
dc.type.urihttp://purl.org/eprint/type/JournalArticleen_US
eprint.statushttp://purl.org/eprint/status/NonPeerRevieweden_US
dspace.orderedauthorsMocz, Philip; Vogelsberger, Mark; Pakmor, Rüdiger; Genel, Shy; Springel, Volker; Hernquist, Larsen_US
dspace.embargo.termsNen_US
dc.identifier.orcidhttps://orcid.org/0000-0001-8593-7692
mit.licenseOPEN_ACCESS_POLICYen_US


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