Hagen-Poiseuille's Equation can be used to determine the pressure drop of a constant viscosity Newtonian fluid exhibiting laminar flow through a rigid pipe. Non-newtonian liquids do not obey Poiseuille's law because their viscosities are velocity dependent. The assumption of
streamlined (laminar) flow is built in to Poiseuille's law. If turbulence occurs than you must be very careful about using Poiseuille's law to calculate flow rates. If turbulence does occur in the flow then the volume flow rate is dramatically reduced.
streamlined (laminar) flow is built in to Poiseuille's law. If turbulence occurs than you must be very careful about using Poiseuille's law to calculate flow rates. If turbulence does occur in the flow then the volume flow rate is dramatically reduced.
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