Abstract: A new approach to model viscosity in the conservation of
momentum equations is presented and discussed. Coefficient of
viscosity is modeled in such a way that it reaches
asymptotically to infinity at the solid boundary but still
yields a finite value for the shear stress at the solid wall.
Basic objective of this research is to show that certain
combinations of higher order normal velocity gradients become
zero at the solid boundary .Modified solution for the Couette
flow and Poiseuille flow between two parallel plates are
obtained by modeling the coefficient of viscosity in a novel
way. Also, viscous drag computed by our model is expected to yield
higher values than the values predicted by the existing models,which matches closely to the experimental data.
Key words: Coefficient
of viscosity Solid boundary Viscous drag
Manuscript received on July 20, 1999
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