2026-05-02T13:17:21Zhttps://ebiltegia.mondragon.edu/oai/request

oai:ebiltegia.mondragon.edu:20.500.11984/58852024-03-04T13:48:23Zcom_20.500.11984_473col_20.500.11984_478

Shevtsova, Valentina 2022-11-24T14:47:16Z 2022-11-24T14:47:16Z 2022 1089-7666 https://katalogoa.mondragon.edu/janium-bin/janium_login_opac.pl?find&ficha_no=169047 https://hdl.handle.net/20.500.11984/5885 The stability of thermocapillary/buoyant flows is affected by a remote thermal source. We present a nonlinear two-phase computational study of convection in a liquid bridge that develops under the action of Marangoni and buoyancy forces as well as under the influence of distant thermal disturbances. The gas phase (air) occupies a typical annular container holding a liquid bridge (n-decane, Pr = 14), and the disturbances are locally imposed in the form of hot/cold spots on the outer wall of the container. The hydrothermal wave instability and pattern selection have been explored for two temperature differences Δ𝑇���� by varying the intensity of thermal source Hf over a wide range. Not far from the critical point, in all the cases, the instability emerges in the form of a standing wave, but the azimuthal wavenumber depends on whether the external perturbation is caused by cooling (m = 2) or by heating (m = 1). Further into supercritical area, 45% above the threshold, in the region with thermal perturbations ⎯200<𝐻����𝑓����<50, the flow pattern comprises, but is not limited to, a hydrothermal traveling wave with the azimuthal wavenumber m = 2. For hotter perturbations, the instability develops either in the form of traveling or standing waves, depending on Hf, with the prevailing mode m = 1, but with a strong presence of other modes. eng © 2022 AIP Publishing Pattern selection for convective flow in a liquid bridge subjected to remote thermal action http://purl.org/coar/resource_type/c_6501