Visualization of flow past square cylinders with corner modification

• Autorzy: Virkam C. K. , Ravindra H. V. , Krishne Gowda Y. T.

Identyfikatory

DOI

10.30464/jmee.2020.4.3.285

• Języki publikacji: EN

Abstrakty

EN

This article presents the results for flow past a square cylinder and two square cylinders of same and different size with corner modifications by varying the spacing ratio. Here, experimental work is conducted in a recirculatory channel filled with water. A set of aluminum discs made to rotate to create the flow in the test section. Motor is used to vary the speed of water. Fine aluminum powder is used as a tracer medium. It is observed that vortex shedding frequency decreases by placing second cylinder in the downstream of the first cylinder. For a similar size cylinders, the width of the eddy in the middle of the cylinders increases with increase in spacing ratio. With the increase of spacing ratio to 6, the flow past each cylinder behaves like single square cylinder. If upstream square cylinder size is smaller than the downstream square cylinder, the eddy size is reduced in between the cylinder compared to the downstream of the second cylinder. If upstream square cylinder size is bigger than the downstream square cylinder, the eddy size is larger in between the cylinder compared to the downstream of the second cylinder.

Słowa kluczowe

EN

flow visualization; spacing ratio; Strouhal number

PL

wizualizacja przepływu; liczba Strouhala

• Wydawca: Wydawnictwo Uczelniane Politechniki Koszalińskiej
• Czasopismo: Journal of Mechanical and Energy Engineering
• Rocznik: 2020
• Tom: Vol. 4, No 3
• Strony: 285--293
• Opis fizyczny: Bibliogr. 10 poz., rys.

Twórcy

autor

Virkam C. K.

• Faculty of Mechanical Engineering Department, PES College of Engineering, Mandya, Karnataka, India

autor

Ravindra H. V.

• Principal of PES College of Engineering, Mandya, Karnataka India

autor

Krishne Gowda Y. T.

• Principal of Maharaja Institute of Technology Thandavapura, Mysore, Karnataka, India.

Bibliografia

• 1. Kamel Elshorbagy, Essam Wahba and Rola Afify., “Visualization versus CFD simulation of laminar flow past bluff body”, Proceedings of tenth international congress of fluid dynamics, December 2010, pp 16-19.
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• 3. Kazuo Ohmi, Alharbi Alaa and Tuladhar Sudat.,“Streak Image based 3D Tomographic Velocimetry applied to a Water Flow past a Submerged Square Cylinder”,17th International Symposium on Applications of Laser Techniques to Fluid Mechanics Lisbon, Portugal, 07-10 July, 2014, pp 1-6.
• 4. Bhupendra Singh More, Sushanta Dutta , Manish Kumar Chauhan and Bhupendra Kumar Gandhi. “Experimental investigation of flow field behind two tandem square cylinders with oscillating upstream cylinder”, Experimental Thermal and Fluid Science, Vol. 68, 2015, pp 339-358.
• 5. T.G. Zaki, T.M. Sen and M. Gad-el-hak.,“Numerical and experimental investigation of flow past a freely rotatable square cylinder”, Journal of Fluids and Structures, Vol. 8, 1994, pp 555-582.
• 6. R. Gnatowska .“Aerodynamic characteristics of two-dimensional sharp-edged objects in tandem arrangement”, Arch. Mech., Vol. 60, No. 6, 2008, pp. 475-490.
• 7. Nasaruddin Salam, N.G. Wardana, Slamet Wahyudi and Denny Widhiyanuriyawan.,“Fluid Flow Through Triangular and Square Cylinders ”, Australian Journal of Basic and Applied Sciences, Vol. 8, No. 2, 2014, pp. 193-200
• 8. J.D. Kim, B. Havel, H. Hangan., “Numerical and Experimental Investigation of the near Wake Dynamics for a Square Prism”, pp 1-7.
• 9. Yoichi Yamagishi, Shigeo Kimura, Makoto Oki and Chisa Hatayama, “Effect of corner cutoffs on flow characteristics around a square cylinder”, 10th International conference on fluid control, Measurements and visualization, Moscow, Russia. August 2009, pp 17-21.
• 10. T. Tamura, T. Miyagi and T. Kitagishi., “Numerical prediction of unsteady pressures on a square cylinder with various corner shapes”, Journal of Wind Engineering and Industrial Aerodynamics, Vol. 74, No. 76, 1998, pp 531-54.

Uwagi

PL

Opracowanie rekordu ze środków MNiSW, umowa Nr 461252 w ramach programu "Społeczna odpowiedzialność nauki" - moduł: Popularyzacja nauki i promocja sportu (2020).