flow equation

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• Groundwater flow equation — Used in hydrogeology, the groundwater flow equation is the mathematical relationship which is used to describe the flow of groundwater through an aquifer. The transient flow of groundwater is described by a form of the diffusion equation, similar …   Wikipedia

• Flow measurement — is the quantification of bulk fluid movement. Flow can be measured in a variety of ways. Positive displacement flow meters acumulate a fixed volume of fluid and then count the number of times the volume is filled to measure flow. Other flow… …   Wikipedia

• Flow (mathematics) — In mathematics, a flow formalizes, in mathematical terms, the general idea of a variable that depends on time that occurs very frequently in engineering, physics and the study of ordinary differential equations. Informally, if x(t) is some… …   Wikipedia

• Équation de Darcy-Weisbach — L équation de Darcy Weisbach est une importante équation très utilisée en hydraulique[Paraschivoiu 1]. Elle permet de calculer la perte de charge due à la rugosité des conduites (« perte de charge linéaire », par opposition aux pertes… …   Wikipédia en Français

• Equation de Navier-Stokes - moyenne de Reynolds — Moyenne de Reynolds Dans le cadre du traitement en mécanique des fluides de la turbulence, l utilisation de la décomposition de Reynolds appliquée aux solutions de l équation de Navier Stokes permet de simplifier le problème en faisant… …   Wikipédia en Français

• Équation de Navier-Stokes - moyenne de Reynolds — Moyenne de Reynolds Dans le cadre du traitement en mécanique des fluides de la turbulence, l utilisation de la décomposition de Reynolds appliquée aux solutions de l équation de Navier Stokes permet de simplifier le problème en faisant… …   Wikipédia en Français

• 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

• Flow tracer — A flow tracer is any fluid property used to track flow. The concentration of a chemical compound in the fluid can be used as a chemical tracer, and characteristics such as temperature are physical tracers. Tracers may be artificially introduced,… …   Wikipedia

• flow net —    1. A graphical representation of flow lines and equipotential lines for two dimensional, steady state ground water flow [22].    2. A net of orthogonal streamlines and equipotential lines applied in the graphical solution of Laplace’s equation …   Lexicon of Cave and Karst Terminology

• equation of continuity — The equation of continuity states that (a) air mass flow is constant, as mass can neither be created nor destroyed, and (b) the product of a cross sectional area (A), velocity (V), and density (ρ) is constant (K), or AVρ = K. It assumes that… …   Aviation dictionary

• Potential flow — streamlines around a NACA 0012 airfoil at 11° angle of attack, with upper and lower streamtubes identified. In fluid dynamics, potential flow describes the velocity field as the gradient of a scalar function: the velocity potential. As a result,… …   Wikipedia