Poiseuille law for resistance


As fluid flows through tubes there is resistance, between the fluid and the wall that opposes the flow. The resistance to laminar flow of an incompressible fluid, through a horizontal tube of uniform radius and length is related to the viscosity of the fluid the length and the radius of the tube

Related formulas


RResistance to laminar flow (N*s/m5)
nViscosity of the fluid (N*s/m2)
lLength of the tube (m)
rTube radius (m)