Mass transfer in the laminar boundary layer along a flat plate calculated by means of the integral method

✍ Scribed by Merk, H. J.

• Publisher: Springer
• Year: 1959
• Tongue: English
• Weight: 651 KB
• Volume: 8
• Category: Article
• ISSN: 0003-6994
• DOI: 10.1007/bf00411754

✦ Synopsis

The approximation method propounded by yon Kgrm~n and Pohlh au sen for hydrodynamic boundary layers has been applied to the calculation of the mass transfer in the laminar boundary layer along a flat plate without longitudinal pressure gradient. The velocity and concentration profiles are represented by polynomials of the 4th degree in terms of the distance from the wall. It is shown that for mass transfer this method leads to a rather complicated system of formulae. The calculations based upon this method are performed for several values of the Sehmidt number Sc, viz. for Sc = 0.1, 0.6, 1, 2, 5, 10, 50 and 100. The general trend of the results is in accordance with the exact theory. However, it appears that the numerical work involved is extensive and its accuracy disappointing. Furthermore, for Schmidt numbers lower than 1 the approximation method fails at certain negative values of the transfer parameter B.