Numerical analysis of thermoconvective vortex control in a confined laminar rotating model
This study numerically investigates how the intensity and spatial position of a non-uniform heat source at the lower boundary influence the formation, structure, and evolution of ther moconvective vortices in a rotating Rayleigh–Bénard system under laminar conditions. We first analyze how temporal v...
| Autores: | , , |
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| Tipo de recurso: | artículo |
| Fecha de publicación: | 2026 |
| País: | España |
| Institución: | Universidad de Castilla-La Mancha |
| Repositorio: | RUIdeRA. Repositorio Institucional de la UCLM |
| OAI Identifier: | oai:dnet:ruidera_____::6d32bcebfa9a07d35a7f2ed28880399b |
| Acceso en línea: | https://doi.org/10.1063/5.0316139 https://hdl.handle.net/10578/48208 |
| Access Level: | acceso abierto |
| Palabra clave: | Coriolis effects Finite-element analysis Fluid mechanics Heat transfer Natural convection Navier Stokes equations Vortex dynamics |
| Sumario: | This study numerically investigates how the intensity and spatial position of a non-uniform heat source at the lower boundary influence the formation, structure, and evolution of ther moconvective vortices in a rotating Rayleigh–Bénard system under laminar conditions. We first analyze how temporal variations in the heat-source intensity and extent affect the strength of a stationary vortex, explaining its intensification through a force-balance analy sis. The response of the vortex to a moving heat source is also examined, showing that the it follows the displacement of the source. Introducing a second heat spot reveals several possible flow regimes depending on their separation distance: persistence of a single vor tex, coexistence of two interacting vortices, or the emergence of an independent secondary vortex. This behavior is interpreted using the Q-criterion, which distinguishes rotational from deformational components of the flow. By varying the heat-source intensity and the ambient rotation, we construct a bifurcation diagram that captures the transition from stationary vortices to periodic vortical structures, including double-vortex configurations. Finally, we analyze how changes in heat-source intensity and position affect the dynamics of these periodic states |
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