Engineering ToolBox - Resources, Tools and Basic Information for Engineering and Design of Technical Applications!
The Poiseuille's formula express the disharged streamlined volume flow through a smooth-walled circular pipe:
V = π p r4 / 8 η l (1)
where
V = discharge volume flow (m3/s)
p = pressure difference between the ends of the pipe (N/m2, Pa)
r = internal radius of pipe (m)
l = length of pipe (m)
η = viscosity of fluid
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