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Investigation of the Channel Flow with Internal Obstacles Using Large Eddy Simulation and Finite-Element Technique
Applied and Computational Mathematics
Volume 2, Issue 1, February 2013, Pages: 1-13
Received: Feb. 2, 2013; Published: Feb. 20, 2013
Authors
A. F. Abdel Gawad, Professor of Mechanical Power Engineering, Faculty of Engineering, Zagazig University, Egypt
N. A. Mohamed, Lecturer, Faculty of Engineering, Zagazig University, Egypt
S. A. Mohamed, Professor of Engineering Mathematics, Faculty of Engineering, Zagazig University, Egypt
M. S. Matbuly, Professor of Engineering Mathematics, Faculty of Engineering, Zagazig University, Egypt
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Abstract
This paper considers the turbulent-flow characteristics and the mechanism of vortex shedding behind one and two square obstacles centered inside a 2-D channel. The investigation was carried out for a range of Reynolds number (Re) from 1 to 300 with a fixed blockage ratio β = 0.25. Comparison of the flow patterns for the single and two obstacles was feasible. The computations were based on the finite-element technique. Large-eddy simulation (LES) with the Smagorinsky method was used to model the turbulent flow. Streamline patterns and velocity contours were visualized to monitor the vortex shedding. The results show that the mechanism of the vortex shedding has different characteristics for the two cases of one and two square obstacles. Interesting findings and useful conclusions were recorded.
Keywords
Channel Flow, Obstacles, Turbulence, Finite-element, LES
A. F. Abdel Gawad, N. A. Mohamed, S. A. Mohamed, M. S. Matbuly, Investigation of the Channel Flow with Internal Obstacles Using Large Eddy Simulation and Finite-Element Technique, Applied and Computational Mathematics. Vol. 2, No. 1, 2013, pp. 1-13. doi: 10.11648/j.acm.20130201.11
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