A fully coupled method for computing uniform fluctuating flow around bluff bodies

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Abstract

This paper discusses the computation of unsteady two-dimensional incompressible viscous uniform fluctuating flow around bluff bodies. The study focuses on the case where the upstream uniform flow around a circular cylinder is fluctuating in time, harmonically. An implicit second order fully coupled resolution method is developed using a finite volume technique for cell-centered collocated grids. This approach is an alternative to classical segregated approaches, like SIMPLE or PISO. Whereas the segregated methods lead to a sequential resolution of discrete equations and under-relaxation procedures, only one linear system in velocity-pressure is solved using the fully coupled method. The non-linear effects are thus handled better, and the non-linear residues convergence is considerably accelerated. Efficiency and robustness of this numerical technique allows to simulate with accuracy unsteady flows such as uniform fluctuating flow around circular cylinder.

Original languageEnglish
Title of host publicationEACWE 2005 - 4th European and African Conference on Wind Engineering
Pages88-89
Number of pages2
Publication statusPublished - 1 Dec 2005
Event4th European and African Conference on Wind Engineering, EACWE 2005 - Prague, Czech Republic
Duration: 11 Jul 200515 Jul 2005

Conference

Conference4th European and African Conference on Wind Engineering, EACWE 2005
CountryCzech Republic
CityPrague
Period11/07/0515/07/05

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Didier, E., & Borges, A. R. J. (2005). A fully coupled method for computing uniform fluctuating flow around bluff bodies. In EACWE 2005 - 4th European and African Conference on Wind Engineering (pp. 88-89)