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coefficient of discharge

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  • coefficient of discharge — the ratio of the actual discharge to the ideal discharge, assuming unit coefficients of contraction and velocity, equal to the product of these coefficients …   Useful english dictionary

  • Discharge coefficient — In a nozzle or other constriction, the discharge coefficient (also known as coefficient of discharge) is the ratio of the mass flow rate at the discharge end of the nozzle to that of an ideal nozzle which expands an identical working fluid from… …   Wikipedia

  • discharge coefficient — noun : coefficient of discharge …   Useful english dictionary

  • coefficient of contraction — physics : the ratio of the cross sectional area of the first vena contracta to the area of the discharge aperture …   Useful english dictionary

  • Townsend discharge — The Townsend discharge is a gas ionization process where an initially very small amount of free electrons, accelerated by a sufficiently strong electric field, give rise to electrical conduction through a gas by avalanche multiplication: when the …   Wikipedia

  • Nash-Sutcliffe efficiency coefficient — The Nash Sutcliffe model efficiency coefficient is used to assess the predictive power of hydrological models. It is defined as:E=1 frac{sum {t=1}^Tleft(Q o^t Q m^t ight)^2}{sum {t=1}^Tleft(Q o^t overline{Q o} ight)^2}where Q o is observed… …   Wikipedia

  • Nash–Sutcliffe model efficiency coefficient — The Nash–Sutcliffe model efficiency coefficient is used to assess the predictive power of hydrological models. It is defined as: where Qo is observed discharge, and Qm is modeled discharge. Qot is observed discharge at time t.[1] Nash–Sutcliffe… …   Wikipedia

  • Flow coefficient — The flow coefficient of a device is a relative measure of its efficiency at allowing fluid flow. It describes the relationship between the pressure drop across an orifice, valve or other assembly and the corresponding flow rate.Coefficent of… …   Wikipedia

  • weir coefficient —    A coefficient used in transforming water depths into discharge volumes in weir measurements [16] …   Lexicon of Cave and Karst Terminology

  • Orifice plate — Flat plate, sharp edge orifice ISO 5167 Orifice Plate An orifice plate is a device used for measuring the volumetric flow rate. It …   Wikipedia

  • Steam whistle — A steam whistle is a device used to produce sound with the aid of live steam. Unlike a horn, the sounding mechanism of a whistle contains no moving parts (compare to train horn).The whistle consists of the following main parts, as seen on the… …   Wikipedia

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