Metallurgical Engineering > GATE 2021 > Fluid Flow
For a fully developed 1-D flow of a Newtonian fluid through a horizontal pipe of radius R (see figure), the axial velocity (vz) is given by:
vz = [ΔP/L](R2 - r2)/4µ
where, ΔP is the pressure difference (P1 - P2), µ is the viscosity, 'r' is the radial distance from the axis and L is the length of the tube. The shear stress exerted by the fluid on the tube wall is:
vz = [ΔP/L](R2 - r2)/4µ
where, ΔP is the pressure difference (P1 - P2), µ is the viscosity, 'r' is the radial distance from the axis and L is the length of the tube. The shear stress exerted by the fluid on the tube wall is:
Correct : a
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