In English

Numerical simulation of flow around a pyramid using Large Eddy Simulation

Anders Bengtsson
Göteborg : Chalmers tekniska högskola, 2014. Diploma work - Department of Applied Mechanics, Chalmers University of Technology, Göteborg, Sweden, ISSN 1652-8557; 2014:01, 2014.
[Examensarbete på avancerad nivå]

In this Master Thesis, flow around a pyramid with 60 apex angle at a Reynolds number of Re = 27000 was studied numerically using Large eddy simulation. The pyramid was mounted on a plate, with the base of the pyramid parallel to the plate edges. The pyramid base width was 0.045 m, and the free-stream inlet velocity was U1 = 10 m/s. Computations were performed using the software AVL Fire. The Smagorinsky model was used for the sub-grid-scale model. Simulations were compared with experiments using an identical setup which allowed for effective comparisons. A proper orthogonal decomposition was performed on the computed flow to create a set of modes to describe the flow. The computed modes were correlated to surface pressure at different locations on the pyramid surface in order to find a set of sensor location that can best be used to express the entire

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