dc.creator | Serrano Aguilera, J.J. | es |
dc.creator | Blanco Rodríguez, Francisco Jose | es |
dc.creator | Parras, L. | es |
dc.date.accessioned | 2022-09-13T15:39:56Z | |
dc.date.available | 2022-09-13T15:39:56Z | |
dc.date.issued | 2021 | |
dc.identifier.citation | Serrano Aguilera, J.J., Blanco Rodríguez, F.J. y Parras, L. (2021). Global stability analysis of the natural convection between two horizontal concentric cylinders. International Journal of Heat and Mass Transfer, 172, Article number 121151. | |
dc.identifier.issn | 0017-9310 | es |
dc.identifier.uri | https://hdl.handle.net/11441/137038 | |
dc.description | Article number 121151 | es |
dc.description.abstract | In this investigation, the 2D flow between two horizontally positioned concentric cylinders (gravity perpendicular to the axis of the cylinders), where the inner cylinder is kept at constant temperature Ti higher
than the outer border temperature To, is analyzed. Buoyancy forces initiate the movement of the fluid and
the generated flow is studied in a fixed geometry for values of Prandtl numbers (Pr) between 0.01 and 1,
and Rayleigh numbers (Ra) between 102 and 5 · 106. To solve the problem, a Chebyshev-Fourier spectral
code is developed in polar coordinates (r, θ ) respectively, and a complete map of steady-state solutions
is obtained where regions with multiple solutions are identified. Later, a global stability study of the obtained stationary solutions is carried out, providing a transition curve to unstable areas as a function of
the control parameters of the problem (Pr, Ra). Finally, to check the stability results, temporal evolution
simulations are accomplished for several cases where dual solutions are presented, finding intermediate
almost stationary solutions, and demonstrating that there exist typically single oscillating plume or double oscillating plume solutions (depending on the parameter space), where some of them have higher
heat transfer coefficients, which may be interesting alternatives to improve heat exchange systems by
means of passive control techniques. | es |
dc.description.sponsorship | Ministerio de Ciencia, Innovación y Universidades (España) FJCI-2017-32403 | es |
dc.description.sponsorship | Junta de Andalucía (España) IJCI-2016-30126, UMA18-FEDERJA-195 | es |
dc.format | application/pdf | es |
dc.format.extent | 16 p. | es |
dc.language.iso | eng | es |
dc.publisher | Elsevier Ltd | es |
dc.relation.ispartof | International Journal of Heat and Mass Transfer, 172, Article number 121151. | |
dc.rights | Attribution-NonCommercial-NoDerivatives 4.0 Internacional | * |
dc.rights.uri | http://creativecommons.org/licenses/by-nc-nd/4.0/ | * |
dc.subject | Natural convection | es |
dc.subject | Spectral methods | es |
dc.subject | Boussinesq approximation | es |
dc.subject | Buoyancy–driven flow | es |
dc.subject | Solar thermal energy | es |
dc.title | Global stability analysis of the natural convection between two horizontal concentric cylinders | es |
dc.type | info:eu-repo/semantics/article | es |
dcterms.identifier | https://ror.org/03yxnpp24 | |
dc.type.version | info:eu-repo/semantics/publishedVersion | es |
dc.rights.accessRights | info:eu-repo/semantics/openAccess | es |
dc.contributor.affiliation | Universidad de Sevilla. Departamento de Ingeniería Aeroespacial y Mecánica de Fluidos | es |
dc.relation.projectID | FJCI-2017-32403 | es |
dc.relation.projectID | IJCI-2016-30126, UMA18-FEDERJA-195 | es |
dc.relation.publisherversion | https://www.sciencedirect.com/science/article/pii/S0017931021002544 | es |
dc.identifier.doi | 10.1016/j.ijheatmasstransfer.2021.121151 | es |
dc.journaltitle | International Journal of Heat and Mass Transfer | es |
dc.publication.volumen | 172 | es |
dc.publication.initialPage | Article number 121151 | es |