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Início Arquivos Representantes Futuras reuniões American Society of Thermal and Fluids Engineering

EVALUATION OF CFD ALGORITHMS FOR SOLVING A CANONICAL PROBLEM OF FLOW OVER A SQUARE CYLINDER

Lauren E. Olsen
The University of St. Thomas, 2115 Summit Avenue, St. Paul, 55105-1079, USA

John P. Abraham
School of Mechanical Engineering, Purdue University, West Lafayette, Indiana, USA; The University of St. Thomas, 2115 Summit Avenue, St. Paul, 55105-1079, USA

DOI: 10.1615/TFEC2019.cmd.029015
pages 451-454


Palavras-chave: computational fluid dynamics, external flow over blunt objects, drag coefficients, turbulence models, blockage corrections

Resumo

Defining and quantifying the flow over two-dimensional objects has long been studied by the scientific community, where both experimentation and numerical simulations have been used. It is surprising that the work on the square shape has left some issues which remain unsettled. Here, numerical simulation is used to explore this problem and a large number of CFD algorithms are employed. Included among this list are commonly used two-equation models, a new model that accounts for transition between laminar and turbulent flow, and Reynolds Stress Models. Among the issues studied are variation of the drag coefficients with Reynolds numbers, and the impact of upstream conditions on the flow. Also, the effect of blockage is investigated (when a solid object is placed within a confined flow, such as a wind tunnel). The best performing model is identified and utilized.

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