Visualization of flow past square cylinders with corner modification

Ch. Krishnappa Vikram; H. V. Ravindra; Y. T. Krishnegowda

doi:10.30464/jmee.2020.4.3.285

Ch. Krishnappa Vikram Faculty of Mechanical Engineering, P.E.S. College of Engineering, Mandya, Karnataka, India
H. V. Ravindra Faculty of Mechanical Engineering, P.E.S. College of Engineering, Mandya, Karnataka, India https://orcid.org/0000-0002-3050-1581
Y. T. Krishnegowda Maharaja Institute of Technology Thandavapura, Mysore, Karnataka, India

DOI: https://doi.org/10.30464/jmee.2020.4.3.285

Keywords: Flow visualization, Spacing ratio, Strouhal number

Abstract

This article presents the results for flow past a square cylinder and two square cylinders of the same and different sizes 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. The motor is used to vary the speed of the water. Fine aluminum powder is used as a tracer medium. It is observed that vortex shedding frequency decreases by placing the second cylinder in the downstream of the first cylinder. For similar size cylinders, the width of the eddy in the middle of the cylinders increases with an increase in spacing ratio. With the increase of spacing ratio to 6, the flow past each cylinder behaves like a single square cylinder. If the 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 the 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.

Downloads

Download data is not yet available.

Author Biographies

Ch. Krishnappa Vikram, Faculty of Mechanical Engineering, P.E.S. College of Engineering, Mandya, Karnataka, India

Ch. Krishnappa Vikram after graduating in Mechanical Engineering from P.E.S.Collegeof EngineeringMandya did M.Tech and PhD in.Presently working as Assistant professor in P.E.S.C.E.Mandya.13 Inernational & National publications(Journals and conferences) published with a teaching experience of 14 years.

H. V. Ravindra, Faculty of Mechanical Engineering, P.E.S. College of Engineering, Mandya, Karnataka, India

H. V. Ravindra after graduating in Mechanical Engineering from P.E.S.College of Engineering Mandya, University of Mysore, received his M.Tech from Indian Institute of Technology Madras, Chennai, India .Then completed his Ph. D from Indian Institute of Technology Madras, Chennai, India. Presently working as a Principal in P.E.S. College of Engineering, Mandya and Administrative Officer, P.E.T. Sports Complex, Mandya. Teaching and Research Experience of 33 Years. Guided 12 Ph.D's and one M.Sc. by Research degrees have been awarded, and at present eight Ph.D scholars are pursuing research under his guidance Around 200 International and 32 National Publications (Journals and conferences) published. Several Projects (around 135) have been guided for UG & PG Students Sponsored Projects Six projects sponsored by AICTE, Five projects sponsored by UGC, Three projects sponsored by DST, One each project sponsored by VTU, DRDO-Pune and NRB.

Y. T. Krishnegowda, Maharaja Institute of Technology Thandavapura, Mysore, Karnataka, India

Y. T. Krishnegowda after graduating in Mechanical Engineering from P.E.S.College of Engineering Mandya, University of Mysore, received his Masters in Engineering from Indian Institute of Science, Bangalore. Then completed his Ph.D from prestigious Indian Institute of Technology, Chennai. During his Ph.D study, he was the winner of Dr. Despande Award for best research paper in the international conference at IIT, Chennai. Dr. Krishne Gowda has more than 35 years of teaching experience. He started his career as Lecturer in PES college of Engineering, Mandya and became professor. He was appointed as Deputy Director to AICTE and later became its Director. He worked in AICTE Delhi Bhopal, and Mumbai. While in Bhopal, he was Executive Committee member of Rajiv Gandhi Proudyogiki Vishwavidyalaya, involved in awarding doctorate to Late Dr. A P J Abdul Kalam when he was heading DRDO. Dr. Krishne Gowda is well-known for his advisory acumen. He worked as advisor to the followingInstitutions: Yegachi Institute of technology, Hassan, Karnataka Patel Institute of Technology, Mehsana, Gujarat Venkateshwara College of Engineering, Indore, Madhya Pradesh .He has published more than 30 papers in several major international and national journals in mechanical engineering, management science and information systems. In July 2016 Venus International Foundation, Chennai, conferred on him the Venus International Faculty Award for Life Time Achievement in recognition of his outstanding contribution in the area of Computational Fluid Dynamics and teaching excellence. He is actively involved in research and has successfully guided 5 Ph.D candidates and 5 in progress Dr. Krishne Gowda is a founder Secretary of Maharaja Education Trust He played a key role in establishing the following EducationalInstitutions: Maharaja Institute of Technology,Mysore Maharaja Institute of Technology, Thandavapura Center of Excellence in Corporate Social Responsibility Maharaja Research Foundation (MRF) is giving scholarship to its Research Scholars to Doctoral Research. Agricultural Food & Management Institute Gopalaswamy PU and DegreeCollegeRecently on 15th September 2016 he has been awarded as Best Mechanical Engineer by Institutions of Engineers Mysore Chapter for his contribution in Engineering, Management and Education. Today, Dr. Krishne Gowda is best-known academician and educationist in Mysore region.