Abstract
In this note we extend the results of Akyildiz et al. [Similarity solutions of the boundary layer equations for a nonlinearly stretching sheet. Mathematical Methods in the Applied Sciences (www.interscience.wiley.com). doi:10.1002/mma.1181] for any n > 0, where n is a nonlinear stretching parameter. Thus, the proof presented for the existence of the similarity solutions for the boundary layer equation for a nonlinearly stretching sheet presented in Akyildiz et al. hold not only for positive odd integer values of n, but also for any real value of n > 0: That is, n can be any positive real. We accomplish this by defining the stretching velocity of the sheet as u = csgn(x)|x|n, −∞ < x < ∞, at y = 0 (instead of u = cx n, 0 < x < ∞, y = 0) and accordingly modifying the similarity variables. This definition for u at the stretching surface eliminates the restrictions on n in all future research results related to flow and heat transfer over nonlinear stretching surfaces.
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Akyildiz, T., Siginer, D.A., Vajravelu, K., Cannon, J.R., Van Gorder, R.A.: Similarity solutions of the boundary layer equations for a nonlinearly stretching sheet. Mathematical Methods in the Applied Sciences (www.interscience.wiley.com). doi:10.1002/mma.1181
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Van Gorder, R.A., Vajravelu, K. A note on flow geometries and the similarity solutions of the boundary layer equations for a nonlinearly stretching sheet. Arch Appl Mech 80, 1329–1332 (2010). https://doi.org/10.1007/s00419-009-0370-6
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DOI: https://doi.org/10.1007/s00419-009-0370-6