Characteristics of a precessing flow under the influence of a convecting temperature field in a spheroidal shell

Vormann, Jan; Hansen, Ulrich

doi:10.1017/jfm.2020.150

Cited by 2 publications

(1 citation statement)

References 60 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Wei and Tilgner [28] considered a fixed uniform background radial stratification in a spherical shell with a small stress-free inner core (see also Ref. [29]). They found that stable stratification can suppress possible precessional instabilities and becomes relevant if the ratio of the Brunt-Väisälä frequency N to the rotation rate is near 1.…”

Section: B Stratified Precessing Flowsmentioning

confidence: 99%

Destabilizing resonances of precessing inertia-gravity waves

et al. 2022

View full text Add to dashboard Cite

HAL is a multi-disciplinary open access archive for the deposit and dissemination of scientific research documents, whether they are published or not. The documents may come from teaching and research institutions in France or abroad, or from public or private research centers. L'archive ouverte pluridisciplinaire HAL, est destinée au dépôt et à la diffusion de documents scientifiques de niveau recherche, publiés ou non, émanant des établissements d'enseignement et de recherche français ou étrangers, des laboratoires publics ou privés. Copyright

show abstract

Section: B Stratified Precessing Flowsmentioning

confidence: 99%

Destabilizing resonances of precessing inertia-gravity waves

et al. 2022

View full text Add to dashboard Cite

show abstract

Laboratory Models of Planetary Core-Style Convective Turbulence

Hawkins

Cheng

Abbate

et al. 2023

Fluids

View full text Add to dashboard Cite

The connection between the heat transfer and characteristic flow velocities of planetary core-style convection remains poorly understood. To address this, we present novel laboratory models of rotating Rayleigh–Bénard convection in which heat and momentum transfer are simultaneously measured. Using water (Prandtl number, Pr≃6) and cylindrical containers of diameter-to-height aspect ratios of Γ≃3,1.5,0.75, the non-dimensional rotation period (Ekman number, E) is varied between 10−7≲E≲3×10−5 and the non-dimensional convective forcing (Rayleigh number, Ra) ranges from 107≲Ra≲1012. Our heat transfer data agree with those of previous studies and are largely controlled by boundary layer dynamics. We utilize laser Doppler velocimetry (LDV) to obtain experimental point measurements of bulk axial velocities, resulting in estimates of the non-dimensional momentum transfer (Reynolds number, Re) with values between 4×102≲Re≲5×104. Behavioral transitions in the velocity data do not exist where transitions in heat transfer behaviors occur, indicating that bulk dynamics are not controlled by the boundary layers of the system. Instead, the LDV data agree well with the diffusion-free Coriolis–Inertia–Archimedian (CIA) scaling over the range of Ra explored. Furthermore, the CIA scaling approximately co-scales with the Viscous–Archimedian–Coriolis (VAC) scaling over the parameter space studied. We explain this observation by demonstrating that the VAC and CIA relations will co-scale when the local Reynolds number in the fluid bulk is of order unity. We conclude that in our experiments and similar laboratory and numerical investigations with E≳10−7, Ra≲1012, Pr≃7, heat transfer is controlled by boundary layer physics while quasi-geostrophically turbulent dynamics relevant to core flows robustly exist in the fluid bulk.

show abstract

Characteristics of a precessing flow under the influence of a convecting temperature field in a spheroidal shell

Cited by 2 publications

References 60 publications

Destabilizing resonances of precessing inertia-gravity waves

Destabilizing resonances of precessing inertia-gravity waves

Laboratory Models of Planetary Core-Style Convective Turbulence

Contact Info

Product

Resources

About