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**Harvard**

Bengtsson, A. (2014) *Numerical simulation of flow around a pyramid using Large Eddy Simulation*. Göteborg : Chalmers University of Technology (Diploma work - Department of Applied Mechanics, Chalmers University of Technology, Göteborg, Sweden, nr: 2014:01).

** BibTeX **

@mastersthesis{

Bengtsson2014,

author={Bengtsson, Anders},

title={Numerical simulation of flow around a pyramid using Large Eddy Simulation},

abstract={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
flow. The procedure used
can then be used to find optimal measurement positions in situations where only limited measurements can be
taken, such as experimental setups.
It was concluded that Large Eddy Simulation can be effective in describing the
flow around a pyramid, but
that this requires a high spatial resolution. It was also shown that proper orthogonal decomposition can be
used to identify large scale structures in the
flow, as well as finding time-dependent behaviour that can be
linked to surface pressures.},

publisher={Institutionen för tillämpad mekanik, Strömningslära, Chalmers tekniska högskola},

place={Göteborg},

year={2014},

series={Diploma work - Department of Applied Mechanics, Chalmers University of Technology, Göteborg, Sweden, no: 2014:01},

keywords={LES, Pyramid},

}

** RefWorks **

RT Generic

SR Electronic

ID 219486

A1 Bengtsson, Anders

T1 Numerical simulation of flow around a pyramid using Large Eddy Simulation

YR 2014

AB 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
flow. The procedure used
can then be used to find optimal measurement positions in situations where only limited measurements can be
taken, such as experimental setups.
It was concluded that Large Eddy Simulation can be effective in describing the
flow around a pyramid, but
that this requires a high spatial resolution. It was also shown that proper orthogonal decomposition can be
used to identify large scale structures in the
flow, as well as finding time-dependent behaviour that can be
linked to surface pressures.

PB Institutionen för tillämpad mekanik, Strömningslära, Chalmers tekniska högskola,

T3 Diploma work - Department of Applied Mechanics, Chalmers University of Technology, Göteborg, Sweden, no: 2014:01

LA eng

LK http://publications.lib.chalmers.se/records/fulltext/219486/219486.pdf

OL 30