Niemeyer, J

[["dc.bibliographiccitation.artnumber","Code 103036"],["dc.bibliographiccitation.firstpage","79"],["dc.bibliographiccitation.lastpage","91"],["dc.contributor.author","Schmidt, W."],["dc.contributor.author","Maier, A."],["dc.contributor.author","Hupp, M."],["dc.contributor.author","Federrath, C."],["dc.contributor.author","Niemeyer, J."],["dc.contributor.editor","Wagner, Siegfried"],["dc.contributor.editor","Steinmetz, Matthias"],["dc.contributor.editor","Bode, Arndt"],["dc.contributor.editor","Brehm, Matthias"],["dc.date.accessioned","2020-07-09T08:29:54Z"],["dc.date.available","2020-07-09T08:29:54Z"],["dc.date.issued","2009"],["dc.description.abstract","For the treatment of astrophysical flows with high Mach numbers and high Reynolds numbers, we proposed a method called FEARLESS (Fluid mEchanics with Adaptively Refined Large-Eddy SimulationS) that combines adaptive methods and subgrid scale modeling. The basic idea is to resolve anisotropic, supersonic flow features (shocks, collapsing regions) using AMR (AdaptiveMesh Refinement), whereas length scales dominated by isotropic, subsonic turbulence are described by a subgrid scale model. Implementing FEARLESS into the open source AMR code Enzo, we successfully tested the new method both in hydrodynamic and selfgravitating turbulence simulations. In the next phase of the project, FEARLESS will be applied to star formation and galactic disk simulations."],["dc.identifier.doi","10.1007/978-3-540-69182-2_7"],["dc.identifier.scopus","2-s2.0-84897691411"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/66904"],["dc.identifier.url","http://www.scopus.com/inward/record.url?eid=2-s2.0-84897691411&partnerID=MN8TOARS"],["dc.language.iso","en"],["dc.publisher","Kluwer Academic Publishers"],["dc.relation.conference","2007 3rd Joint HLRB and KONWIHR Result and Reviewing Workshop"],["dc.relation.eventend","2007-12-04"],["dc.relation.eventlocation","Garching/Munich"],["dc.relation.eventstart","2007-12-03"],["dc.relation.isbn","978-354069181-5"],["dc.relation.ispartof","High Performance Computing in Science and Engineering, Garching/Munich 2007 - Transactions of the 3rd Joint HLRB and KONWIHR Status and Result Workshop"],["dc.title","Star Formation in the Turbulent Interstellar Medium and Its Implications on Galaxy Evolution"],["dc.type","conference_paper"],["dc.type.internalPublication","no"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","45"],["dc.bibliographiccitation.lastpage","56"],["dc.contributor.author","Iapichino, Luigi"],["dc.contributor.author","Niemeyer, Jens C."],["dc.contributor.author","Adamek, Julian"],["dc.contributor.author","Paul, Surajit"],["dc.contributor.author","Scuderi, Mario"],["dc.contributor.editor","Wagner, Siegfried"],["dc.contributor.editor","Steinmetz, Matthias"],["dc.contributor.editor","Bode, Arndt"],["dc.contributor.editor","Brehm, Matthias"],["dc.date.accessioned","2020-07-07T13:30:22Z"],["dc.date.available","2020-07-07T13:30:22Z"],["dc.date.issued","2009"],["dc.description.abstract","FEARLESS (Fluid mEchanics with Adaptively Refined Large Eddy SimulationS) is a novel numerical approach for hydrodynamical simulations of turbulent flows, which combines the use of the adaptive mesh refinement (AMR) with a subgrid scale (SGS) model for the unresolved scales. We report some results of our first research phase, aimed to the test of new AMR criteria suitable for resolving velocity fluctuations. In this first stage of the project, no SGS model was used. Our simulations of a subcluster merger event clearly show that an accurate resolution of the turbulent flow is important not only for following the evolution of the shear instability, but also for its back-reaction on the subcluster core. A better resolution of the turbulent flow can also affect the level of turbulence in the cluster core, according to the first results of our cosmological simulations. Especially in the latter problem, a significant improvement in the modeling is expected from the use of the full FEARLESS implementation."],["dc.identifier.doi","10.1007/978-3-540-69182-2_4"],["dc.identifier.scopus","2-s2.0-84897675032"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/66883"],["dc.identifier.url","http://www.scopus.com/inward/record.url?eid=2-s2.0-84897675032&partnerID=MN8TOARS"],["dc.language.iso","en"],["dc.publisher","Springer Nature"],["dc.relation.conference","High Performance Computing in Science and Engineering"],["dc.relation.eisbn","978-3-540-69182-2"],["dc.relation.eventend","2007-12-04"],["dc.relation.eventlocation","Garching/Munich"],["dc.relation.eventstart","2007-12-03"],["dc.relation.isbn","978-3-540-69181-5"],["dc.relation.ispartof","High Performance Computing in Science and Engineering, Garching/Munich 2007 - Transactions of the 3rd Joint HLRB and KONWIHR Status and Result Workshop"],["dc.title","Modeling of turbulent flows applied to numerical simulations of galaxy clusters"],["dc.type","conference_paper"],["dc.type.internalPublication","no"],["dspace.entity.type","Publication"]]