Abstract
An analysis is carried out for the steady two-dimensional flow of a micropolar fluid over a shrinking sheet in its own plane. The shrinking velocity is assumed to vary linearly with the distance from a fixed point on the sheet. The features of the flow and heat transfer characteristics are analyzed and discussed. It is found that the solution exists only if adequate suction through the permeable sheet is introduced. Moreover, stronger suction is necessary for the solution to exist for a micropolar fluid compared to a classical Newtonian fluid. Dual solutions are obtained for certain suction and material parameters.
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Abbreviations
- a,m :
-
constants
- C f :
-
skin friction coefficient
- f :
-
dimensionless stream function
- h :
-
dimensionless microrotation
- j :
-
microinertia density
- k :
-
thermal conductivity
- s :
-
suction parameter
- K :
-
material parameter
- N :
-
angular velocity
- Pr :
-
Prandtl number
- T :
-
fluid temperature
- T w :
-
surface temperature
- T ∞ :
-
ambient temperature
- u,v :
-
velocity components in the x and y directions, respectively
- U w :
-
velocity of the shrinking sheet
- V w :
-
transpiration velocity
- x,y :
-
Cartesian coordinates along the sheet and normal to it, respectively
- α :
-
thermal diffusivity
- γ :
-
spin gradient viscosity
- η :
-
similarity variable
- θ :
-
dimensionless temperature
- κ :
-
vortex viscosity
- ν :
-
kinematic viscosity
- μ :
-
dynamic viscosity
- ρ :
-
fluid density
- ψ :
-
stream function
- w :
-
condition at the solid surface
- ∞:
-
ambient condition
- ′:
-
differentiation with respect to η
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Yacob, N.A., Ishak, A. Micropolar fluid flow over a shrinking sheet. Meccanica 47, 293–299 (2012). https://doi.org/10.1007/s11012-011-9439-8
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DOI: https://doi.org/10.1007/s11012-011-9439-8