- The assumptions of the equation are that the fluid is incompressible and Newtonian; the flow is laminar through a pipe of constant circular cross section that is substantially longer than its diameter; and there is no acceleration of fluid in the pipe.
- If µ increases, then the gradient increases in order to drive the same mean volumetric flow rate of a more viscous fluid through the same opening. That is, is the more viscous fluid presents more resistance to flow. This makes sense because a more viscous fluid is “thicker” like syrup compared to water, so the fluid does not flow as easily thus requiring more pressure to push the fluid through the pipe.
- The specific velocity is linearly proportional to the pressure gradient if the viscosity of the fluid is constant.
Return to Exercise 11
Return to where text linked to Exercise 11