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International Journal of Fluid Mechanics Research
ESCI SJR: 0.22 SNIP: 0.446 CiteScore™: 0.5

ISSN Imprimir: 2152-5102
ISSN On-line: 2152-5110

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Volume 46, 2019 Volume 45, 2018 Volume 44, 2017 Volume 43, 2016 Volume 42, 2015 Volume 41, 2014 Volume 40, 2013 Volume 39, 2012 Volume 38, 2011 Volume 37, 2010 Volume 36, 2009 Volume 35, 2008 Volume 34, 2007 Volume 33, 2006 Volume 32, 2005 Volume 31, 2004 Volume 30, 2003 Volume 29, 2002 Volume 28, 2001 Volume 27, 2000 Volume 26, 1999 Volume 25, 1998 Volume 24, 1997 Volume 23, 1996 Volume 22, 1995

International Journal of Fluid Mechanics Research

DOI: 10.1615/InterJFluidMechRes.v38.i4.40
pages 346-352

A New Approach for Determining the Momentum Thickness in Laminar Boundary Layers

Hossein Hamidifar
Department of Irrigation and Reclamation Engineering, University of Tehran, Karaj, Iran

RESUMO

In this paper, a new approach is proposed to determine the momentum thickness within laminar boundary layers over a flat plate. A new coefficient, Cm, is introduced in which relates the momentum thickness to the distance from the edge of the plate. This coefficient is independent from the distance from the edge and could be determined easily using a proposed graph which relates the Cm to the upstream flow velocity and the fluid temperature. The results of the sensitivity analysis showed that as the upstream flow velocity increases, the Cm coefficient is less dependent to the velocity. Also, an illustrative example is solved which indicates the benefits of the proposed approach in compare with the traditional methods as Blasius solution.


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