Journal
INTERNATIONAL JOURNAL OF THERMOPHYSICS
Volume 30, Issue 5, Pages 1649-1670Publisher
SPRINGER/PLENUM PUBLISHERS
DOI: 10.1007/s10765-009-0656-5
Keywords
Heat generation or absorption; Micropolar fluid; Non-linear stretching sheet; Variable viscosity; Variable wall temperature
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In this paper, heat transfer characteristics of a two-dimensional steady hydromagnetic natural convection flow of a micropolar fluid passed a non-linear stretching sheet taking into account the effects of a temperature-dependent viscosity and variable wall temperature are studied numerically for local similarity solutions by applying the Nachtsheim-Swigert iteration method. The results corresponding to the dimensionless temperature profiles and the local rate of heat transfer are displayed graphically for important material parameters. The results show that in modeling the thermal boundary layer flow with a temperature-dependent viscosity, consideration of the Prandtl number as a constant within the boundary layer produces unrealistic results and therefore it must be treated as a variable rather than a constant within the boundary layer. The results also show that the local rate of heat transfer strongly depends on the non-linear stretching index and temperature index.
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