31 results about "Inertance" patented technology

Inertance is a measure of the pressure difference in a fluid required to cause a unit change in the rate of change of volumetric flow-rate with time. The base SI units of inertance are kg m⁻⁴ or Pa m⁻³ s² and the usual symbol is I. The inertance of a tube is given by: I=ρ·ℓ/A where ρ is the density (with dimensionality of mass per volume) of the fluid ℓ is the length of the tube A is the cross-sectional area of the tube The pressure difference is related to the change in flow-rate by the equation: Δp=I·Q=I·dQ/dt where p is the pressure of the fluid Q is the volumetric flow-rate (with dimensionality of volume per time) This equation assumes constant density, that the acceleration is uniform, and that the flow is fully developed "plug flow".