The turbulent flow is hydraulically smooth if the ratio height of roughness projection/the thickness of laminar sub-layer is less than

Related MCQs

• In case of turbulent flow of a fluid through a circular tube (as compared to the case of laminar flow at the same flow rate) the maximum velocity is ....., shear stress at the wall is ....., and the pressure drop across a given length is ....., the correct words for the blanks are, respectively
• Commercial cast-iron and steel pipes carrying fluids under pressure are regarded as hydraulically smooth when
• For turbulent flow in smooth pipes, the entrance length is taken as
• The friction factor in turbulent flow in smooth pipes depends upon the following
• When the Reynolds number is less than 500 the flow is said to be laminar for
• The ratio of average velocity to mzximum velocity for steady laminar flow in circular pipes is
• The statement "For laminar flow through a fine porous bed or capillary passages in a solid, the velocity based on the total cross-section is proportional to the ratio of pressure gradient to viscosity" is known as
• The thickness of turbulent boundary layer at a distance x from the leading edge over a flat plate varies as
• The value of mannings roughness coefficient n, in Manning's formula for flow of fluids through pipes, is expected to be highest in case of
• The thickness of laminar boundary layer at a distance x from the leading edge over a flat plate varies as