Data · dataset · 2026
Stratified flow past a sphere at moderate Reynolds numbers
Listed in National Center for Atmospheric Research
A numerical study of stably stratified flows past spheres at Reynolds numbers Re = 200 and Re = 300 is reported.
Description
In these flow regimes, a neutrally stratified laminar flow induces distinctly different nearwake features. However, the flow behaviour changes significantly as the stratification increases and suppresses the scale of vertical displacements of fluid parcels.
Computations for a range of Froude numbers Fr is an element of[0.1, infinity] show that as Froude number decreases, the flow patterns for both Reynolds numbers become similar. The representative simulations of the lee-wave instability at Fr = 0.625 and the two-dimensional vortex shedding at Fr = 0.25 regimes are illustrated for flows past single and tandem spheres, thereby providing further insight into the dynamics of stratified flows past bluffbodies.
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In particular, the reported study examines the relative influence of viscosity and stratification on the dividing streamline elevation, wake structure and flow separation. The solutions of the Navier-Stokes equations in the incompressible Boussinesq limit are obtained on unstructured meshes suitable for simulations involving multiple bodies. Computations are accomplished using the finite volume, non-oscillatory forward-intime (NFT) Multidimensional Positive Definite Transport Algorithm (MPDATA) based solver.
The impact and validity of the numerical approximations, especially for the cases exhibiting strong stratification, are also discussed. Qualitative and quantitative comparisons with available laboratory experiments and prior numerical studies confirm the validity of the numerical approach. (C) 2021 The Authors.
Published by Elsevier Ltd.
Links
Get the data
- Publisher page n2t.org/ark:/85065/d75t3pxg ↗
documentation · download · from data ucar edu
Where it is published
- data.ucar.edu /dataset/stratified-flow-past-a-sphere-at-moderate-reynolds-num… ↗
National Center for Atmospheric Research dataset page
landing page · from data ucar edu
Catalogue records · 1
- CKAN API data.ucar.edu/api/3/action/package_show?id=6a47ae4b-cdb0-457b-a94e-9f3c3dc5f… ↗
metadata API · from data ucar edu
Topics
- From keywords
- Earth & Environmental Science · Ocean & Atmospheric Science
Provenance · 1 source records, 7 field assertions
| Source | Key | Last seen | Raw |
|---|---|---|---|
| National Center for Atmospheric Research | 6a47ae4b-cdb0-457b-a94e-9f3c3dc5f63c | 9 d ago | JSON v1 |
| Field | Assertion | Extractor | Evidence |
|---|---|---|---|
| concepts[field].local:field:earth-environmental | mapping · data ucar edu | connector:data_ucar_edu@1.0.0 | |
| concepts[field].local:field:ocean-atmospheric | mapping · data ucar edu | connector:data_ucar_edu@1.0.0 | |
| created_date | source · data ucar edu | connector:data_ucar_edu@1.0.0 | |
| description | source · data ucar edu | connector:data_ucar_edu@1.0.0 | /notes |
| publication_date | source · data ucar edu | connector:data_ucar_edu@1.0.0 | |
| title | source · data ucar edu | connector:data_ucar_edu@1.0.0 | /title |
| updated_date | source · data ucar edu | connector:data_ucar_edu@1.0.0 |