Before you read this, I suggest you read posts 20.34 and 20.36. Poiseuille’s equation (highlighted in yellow above) enables us to calculate the rate of flow, R (volume divided by time), of a liquid of viscosity Ƞ in a narrow horizontal tube of radius a and length L, when there is a pressure difference, Δp,… Continue reading 20.37 Poiseuille’s equation

Before you read this, I suggest you read posts 17.15, 20.34 and 20.35. The equation highlighted in yellow, above, is the Navier-Stokes equation for incompressible flow of a fluid. A more complicated form of this equation can be used to explain the flow of compressible fluids. For more information on incompressible and compressible flow, see… Continue reading 20.36 The Navier-Stokes equation