Relation between viscosity of fluid & thickness of boundary layer - Fluid Mechanics

Q.  If viscosity of fluid is more, the thickness of boundary layer is
- Published on 04 Aug 15

a. more
b. less
c. not affected by change in viscosity
d. unpredictable

ANSWER: more

Related Content

 

    Discussion

  • Pankaj   -Posted on 05 Oct 15
    High viscosity of fluid produces high shear stress in the boundary layer. Thus is becomes critical for the development, breakdown and separation of boundary layer.

    The effects of viscosity are important in boundary layer which is a thin layer of fluid in the immediate vicinity of a solid surface.

    The viscous nature of fluid flow decreases the local velocities on the surface. This leads to skin friction. The layer of fluid which is stopped by viscosity near the bounding surface is a boundary layer. More the viscosity of the flowing fluid, more the layer thickness which is stopped flowing by the viscosity.

    Therefore, boundary layer thickness varies directly with the viscosity. If the viscosity of fluid is more, the thickness of boundary layer is more and vice-versa.

➨ Post your comment / Share knowledge


Enter the code shown above:

(Note: If you cannot read the numbers in the above image, reload the page to generate a new one.)
▲