Darcy law of resistance

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• Darcy, Henri-Philibert-Gaspard — ▪ French engineer born June 10, 1803, Dijon, France died Jan. 3, 1858, Paris       French hydraulic engineer who first derived the equation (now known as Darcy s law) that governs the laminar (nonturbulent) flow of fluids in homogeneous, porous… …   Universalium

• Atkinson resistance — is commonly used in mine ventilation to characterise the resistance to airflow of a duct of irregular size and shape, such as a mine roadway. It has the symbol R and is used in the square law for pressure drop,:Delta P = frac{ ho {actual{ ho… …   Wikipedia

• Joule's laws — are a pair of laws concerning the heat produced by a current and the energy dependence of an ideal gas to that of pressure, volume, and temperature, respectively. Joule s first law, also known as the Joule effect, is a physical law expressing the …   Wikipedia

• Reynolds number — In fluid mechanics and heat transfer, the Reynolds number mathrm{Re} is a dimensionless number that gives a measure of the ratio of inertial forces ({old mathrm V} ho) to viscous forces (mu / L) and, consequently, it quantifies the relative… …   Wikipedia

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• Hagen-Poiseuille equation — The Hagen Poiseuille equation is a physical law that describes slow viscous incompressible flow through a constant circular cross section. It is also known as the Hagen Poiseuille law, Poiseuille law and Poiseuille equation.Equationtandard fluid… …   Wikipedia

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• Mark B. Cohen — For other uses, see Mark Cohen (disambiguation). Mark B. Cohen Member of the Pennsylvania House of Representatives from the 202nd district Incumbent Assumed office 1974 Preceded by Eugene Gelfand …   Wikipedia

• Constructal theory — Design in nature is flow. The two sides of the constructal law: we predict the occurrence of design in nature, and we design devices for human use. The constructal law puts forth the idea that the generation of design (configuration, pattern,… …   Wikipedia

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