2026-06-08T12:05:30Zhttps://docta.ucm.es/rest/oai/request

oai:docta.ucm.es:20.500.14352/585912023-08-25T10:59:47Zcom_20.500.14352_14col_20.500.14352_15

Two-dimensional thermal convection flow with variable viscosity and embedded boundaries Uhlmann, Markus Pinelli, Alfredo A two-dimensional model capable of simulating thermal convection flow in complex geometries has been implemented in a finite-difference setting and using a fictitious domain method of type “direct explicit forcing". The Boussinesq approximation is supposed to hold; the coupling between velocity and temperature fields is explicit; spatially varying viscosity is accounted for. The computation of a model for the thermally-induced flow in a three-chamber fuel tank reveals that the present method does not allow for sufficiently large time steps when the viscosity varies strongly. 2023-06-20T18:46:45Z 2023-06-20T18:46:45Z 2003 journal article https://hdl.handle.net/20.500.14352/58591 http://www.ciemat.es/sweb/comfos/personal/uhlmann/heat/report.pdf eng open access