- roughness coefficient
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коэффициент шероховатости
Англо-русский словарь технических терминов. 2005.
roughness coefficient
Смотреть что такое "roughness coefficient" в других словарях:
roughness coefficient — A coefficient that describes roughness of a channel bed [16] … Lexicon of Cave and Karst Terminology
manning roughness coefficient — after Robert Manning. A measure of channel resistance which is used as part of a formula to calculate velocity (Manning N). The values vary between 0.02 for smooth channels and 0.10 for very rough channels … Geography glossary
Hydraulic roughness — is the measure of the amount of frictional resistance water experiences when passing over land and channel features.[1] One roughness coefficient is Manning s n value.[2] An increase in this n value will cause a decrease in the velocity of water… … Wikipedia
Drag coefficient — In fluid dynamics, the drag coefficient (commonly denoted as: cd, cx or cw) is a dimensionless quantity that is used to quantify the drag or resistance of an object in a fluid environment such as air or water. It is used in the drag equation,… … Wikipedia
Chézy formula — In fluid dynamics, the Chézy formula describes the mean flow velocity of steady, turbulent open channel flow: where v is the mean velocity [m/s], C is the Chézy coefficient [m½/s], R is the hydraulic radius ( water depth) [m], and i is the bottom … Wikipedia
Dimensionless quantity — In dimensional analysis, a dimensionless quantity or quantity of dimension one is a quantity without an associated physical dimension. It is thus a pure number, and as such always has a dimension of 1.[1] Dimensionless quantities are widely used… … Wikipedia
Infrastructure Asset Management — is the discipline of managing infrastructure assets that underpin an economy, such as roading, water supply, wastewater, stormwater, power supply, flood management, recreational and other assets. In the past these assets have typically been owned … Wikipedia
Manning N — after Robert Manning. A formula of river velocity: v = (R0.67 x S0.5) / n where R is hydraulic radius, S is channel slope and n is Manning roughness coefficient … Geography glossary
Manning equation — An equation used to compute the velocity of uniform flow in open channel: V=1.486/n R2/3 S1/2, where V is the mean velocity of flow (in cfs units), R is the hydraulic radius in feet, S is the slope of the channel or sine of the slope angle,… … Lexicon of Cave and Karst Terminology
Friction — For other uses, see Friction (disambiguation). Classical mechanics … Wikipedia
Contact mechanics — Continuum mechanics … Wikipedia
