Vis enkel innførsel

dc.contributor.authorTyvand, Peder A.
dc.contributor.authorNøland, Jonas Kristiansen
dc.date.accessioned2021-11-24T11:24:23Z
dc.date.available2021-11-24T11:24:23Z
dc.date.created2021-11-23T13:06:03Z
dc.date.issued2021
dc.identifier.citationPhysics of Fluids. 2021, 33 (114111), .
dc.identifier.issn1070-6631
dc.identifier.urihttps://hdl.handle.net/11250/2831264
dc.description.abstractTransient nonlinear convection in a finite Prandtl number fluid heated uniformly from below is studied analytically and numerically. We consider the simple geometry of a square cavity with normal-mode compatible boundary conditions. By design, only the marginal state of convection onset contributes to the initial condition for the two-dimensional supercritical convection. The thermal amplitude and the flow amplitude are taken as two independent initial conditions. There are two ways of initiation: (i) soft start with a very small initial amplitude, leading to early exponential growth. (ii) Kick-started transient convection with relatively large initial amplitudes, by which we perform a small-time expansion for benchmarking. Seemingly complicated transient flow occurs with a kick-start where the initial spin and the initial buoyancy torque are in conflict. However, the intricate spiraling flow decays after a couple of reversals of flow directions, and a steady convection settles. This is due to the strict antisymmetry of the temperature perturbation around the mid-point of the cavity, in combination with the symmetry of the flow field.
dc.language.isoeng
dc.relation.urihttps://aip.scitation.org/doi/pdf/10.1063/5.0067546
dc.titleTransient nonlinear Rayleigh-Bénard convection with single-mode initiation
dc.typePeer reviewed
dc.typeJournal article
dc.description.versionacceptedVersion
dc.source.pagenumber17
dc.source.volume33
dc.source.journalPhysics of Fluids
dc.source.issue114111
dc.identifier.doihttps://doi.org/10.1063/5.0067546
dc.identifier.cristin1957772
cristin.ispublishedtrue
cristin.fulltextpostprint
cristin.qualitycode2


Tilhørende fil(er)

Thumbnail

Denne innførselen finnes i følgende samling(er)

Vis enkel innførsel