Journal
INTERNATIONAL JOURNAL OF NON-LINEAR MECHANICS
Volume 44, Issue 2, Pages 124-129Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.ijnonlinmec.2008.09.005
Keywords
Magnetohydrodynamic stagnation-point flow; Power-law fluid; Stretching surface
Categories
Funding
- SAP program of UGC, New Delhi, India
- Indian National Science Academy
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Steady two-dimensional stagnation-point flow of an electrically conducting power-law fluid over a stretching surface is investigated when the surface is stretched in its own plane with a velocity proportional to the distance from the stagnation-point. We have discussed the uniqueness of the solution except when the ratio of free stream velocity and stretching velocity is equal to 1. The effect of magnetic field on the flow characteristic is explored numerically and it is concluded that the velocity at a point decreases/increases with increase in the magnetic field when the free stream velocity is less/greater than the stretching velocity. It is further observed that for a given value of magnetic parameter M, the dimensionless shear stress coefficient vertical bar F ''(0)vertical bar increases with increase in power-law index n when the value of the ratio of free stream velocity and stretching velocity is close to 1 but not equal to 1. But when the value of this ratio further differs from 1, the variation of vertical bar F ''(0)vertical bar with n is non-monotonic. (c) 2008 Elsevier Ltd. All rights reserved.
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