Open Access Journal

ISSN : 2456-1290 (Online)

International Journal of Engineering Research in Computer Science and Engineering (IJERCSE)

Monthly Journal for Computer Science and Engineering

Open Access Journal

International Journal of Engineering Research in Mechanical and Civil Engineering (IJERMCE)

Monthly Journal for Mechanical and Civil Engineering

ISSN : 2456-1290 (Online)

Experimental Techniques to Control Flow Structure in Sudden Expansion Geometry

Author : K.Ashokachary 1 S.Manikanthachary 2 V.Rajarao 3

Date of Publication :7th August 2016

Abstract: Reduction in recirculation zone size in suddenly expanded geometries is one of the major issues to deal with. After the flow encountering the sudden expansion geometry it gets many complex features like separation, recirculation, attachment and reverse flow. In the present study, flow over such geometries with blowing and suction scenario are studied for differentLmax/Lminmodels namely 3, 4 and 5.It is found that for Lmax/Lmin= 5 the re-circulation and loss zones are more, for further studying Lmax/Lmin= 5 is subjected to different operating conditions like with blowing and suction. For further improvement the blowing is studied at different heads of pressure like 200 mm and 300 mm of water. With suction flow scenario is completely changed and attachment point is observed at the base of the model itself. Results thus identify the improved flow structure

Reference :

    1.  C. Dales, M.P. Escudier, R.J. Poole, “Asymmetry in the turbulent flow of a viscoelastic liquid through an axisymmetric sudden expansion”, J. Non-Newtonian Fluid Mech. 125 (2005) 61–70.
    2. G.C. Layek, C. Midya, S. Mukhopadhyay, “Effects of Suction and Blowing on Flow Separation in a Symmetric Sudden Expanded Channel”, Modelling and Control, 2008, Vol. 13, No. 4, 451–465.
    3.  Ä°hsanDaÄŸtekin and MazharÜnsal, „Numerical analysis of axisymmetric and planar sudden expansion flows for laminar regime‟, International Journal for Numerical Methods in Fluids, Vol. 65, No. 9, pp. 1133-1144, 2011.
    4. Kaushik V.V.R, GhoshSumana, D.A.S.Gargi, Kumar Das Prasanta, CFD simulation of core annular flow through sudden contraction and expansion, Journal of petroleum science & engineering, Vol. 86-87, pp. 153- 164, 2012.
    5. Chien-Hsiung Tsai, Cheng-PengYeh,Che-Hsin Lin, Ruey-Jen Yang, Lung-Ming Fu, Formation of recirculation zones in a sudden expansion microchannel with a rectangular block structure over a wide Reynolds number range, Micro fluid Nan fluid (2012) 12:213–220.
    6. S.Dhinakaran, M.S.N. Oliveira, F.T. Pinho, M.A. Alves, Steady flow of power-law fluids in a 1:3 planar sudden expansion 2013 Journal of Non-Newtonian Fluid Mechanics 198 (2013) 48–58

Recent Article