Derive the expressions for the velocity distribution and for the pressure drop for a Newtonian fluid in fully developed laminar flow in the annular space between two horizontal, concentric pipes. Apply the momentum theorem to an annular fluid shell of thickness Δr and show that the analysis of such a control volume leads to

The desired expressions may then be obtained by the substitution of Newton€™s viscosity law and two integrations.

Transcribed Image Text:

ДР (rт) %3D г- dr