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Measure of a device's efficiency at allowing fluid flow
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
Flow_coefficient
have to know about the loading, pressure and flow coefficient which are as follow- Loading coefficient {\displaystyle ~} Ψ ′ = g h u 2 {\displaystyle
Compressor_characteristic
Device for measuring or restricting fluid flow
plate, the flow rate can be obtained from Bernoulli's equation using coefficients established from extensive research. In general, the mass flow rate q m
Orifice_plate
Dimensionless parameter to quantify fluid resistance
other flow regimes; in particular, at very low Reynolds number, it is more natural to write the drag force as being proportional to a drag coefficient multiplied
Drag_coefficient
Quantity relating heat flux and temperature difference
methods for calculating the heat transfer coefficient in different heat transfer modes, different fluids, flow regimes, and under different thermohydraulic
Heat_transfer_coefficient
the same exit pressures. Mathematically the discharge coefficient may be related to the mass flow rate of a fluid through a straight tube of constant cross-sectional
Discharge_coefficient
Equation in fluid dynamics
Darcy–Weisbach friction factor, friction factor, resistance coefficient, or flow coefficient. The Darcy-Weisbach equation, combined with the Moody chart
Darcy–Weisbach_equation
Dimensionless number describing relative pressures in a fluid flow field
the pressure coefficient is a dimensionless number which describes the relative pressures throughout a flow field. The pressure coefficient is used in aerodynamics
Pressure_coefficient
Device for testing internal aerodynamics of engine parts
standardization, port flow coefficients are not "true" flow coefficients, which would be based on the actual minimum area in the flow path. Which method
Air_flow_bench
specific speed Nss and its flow coefficient Φ (analogous to, but not the same as, the discharge coefficient in pipe flow). ω s s = ω ⋅ Q ( g ⋅ N P S
Inducer_(pump_component)
Sub-class of turbomachinery
efficiencies and loss coefficients, which are also dimensionless. In general applications, the flow coefficient and head coefficient are considered of primary
Centrifugal_compressor
Machine for continuous flow gas compression
loading coefficient ( ψ {\displaystyle \psi \,} ) as a function of flow coefficient ( ϕ {\displaystyle \phi \,} ) Stage pressure ratio against flow rate
Axial_compressor
Estimate of velocity in open channel flows
introduced in 1768 while the Gauckler–Manning coefficient was first developed in 1865, well before the classical pipe flow resistance experiments in the 1920–1930s
Manning_formula
Dimensionless quantity relating lift to fluid density and velocity over an area
function of the angle of the body to the flow, its Reynolds number and its Mach number. The section lift coefficient cl refers to the dynamic lift characteristics
Lift_coefficient
Measure of inequality of a statistical distribution
In economics, the Gini coefficient (/ˈdʒiːni/ JEE-nee), also known as the Gini index or Gini ratio, is a measure of statistical dispersion intended to
Gini_coefficient
Nondimensional heat transfer coefficient
nondimensionalization of the convective heat transfer coefficient. Like the heat transfer coefficient, the Nusselt number may be defined locally, at a single
Nusselt_number
Pulmonary function test
parameter is the coefficient of retraction (CR) which is Pmax/TLC . Mean transit time (MTT) Mean transit time is the area under the flow-volume curve divided
Spirometry
Retarding force on a body moving in a fluid
with its plane normal to the flow direction, the drag coefficient is constant for Re > 3,500. The further the drag coefficient Cd is, in general, a function
Drag_(physics)
Change in nuclear fission rate caused by voids in a reactor
In nuclear engineering, the void coefficient (more properly called void coefficient of reactivity) is a number that can be used to estimate how much the
Void_coefficient
Difference in pressure between two points of a fluid
provided with an associated flow coefficient, commonly known as Cv or Kv. The flow coefficient relates pressure drop, flow rate, and specific gravity for
Pressure_drop
Tendency of matter to change volume in response to a change in temperature
strain) divided by the change in temperature is called the material's coefficient of linear thermal expansion. For small temperature changes, this is nearly
Thermal_expansion
same values. Head coefficient Efficiency Power coefficient Where, N {\displaystyle N} is speed of rotation. Q {\displaystyle Q} is flow rate. D {\displaystyle
Variable geometry turbomachine
Variable_geometry_turbomachine
Fluid dynamics calculation
uniform normal depth of flow is the slope of the channel bottom [unitless; length/length]; C {\displaystyle C} is Chézy's coefficient [length1/2/time]. Values
Chézy_formula
Hydraulic structure for measuring fluid flow
free-flow discharge can be summarized in this equation: Q = C H n {\displaystyle Q=CH^{n}} Where: Q is flowing rate C is the free-flow coefficient for
Parshall_flume
Streamlined body for generating lift
moves in response to changes in angle of attack and lift coefficient. In two-dimensional flow around a uniform wing of infinite span, the slope of the
Airfoil
Topics referred to by the same term
thermodynamic state of a system Cv, the flow coefficient, used to determine the pressure-drop across an element in fluid flow applications Color vision, the ability
CV
Artificial river barrier
summarised as Q = CLHn where Q is the volumetric flow rate of fluid (the discharge), C is the flow coefficient for the structure (on average a figure of 3
Weir
Engine fuel system device
amounting to no more than a few percent. The flow coefficient of a perfect entry would be 1.0 while the coefficient for a sharp edged entry would be 0.6 and
Velocity_stack
Ratio of inertial to viscous forces acting on a liquid
predict fluid flow patterns in different situations by measuring the ratio between inertial and viscous forces. At low Reynolds numbers, flows tend to be
Reynolds_number
Measure of voltage induced by change of temperature
The Seebeck coefficient (also known as thermopower, thermoelectric power, and thermoelectric sensitivity) of a material is a measure of the magnitude
Seebeck_coefficient
Type of turbine
which the flow of the working fluid is radial to the shaft. The difference between axial and radial turbines consists in the way the fluid flows through
Radial_turbine
Aspects of fluid mechanics involving fluid flow
fluid dynamics is a subdiscipline of fluid mechanics that describes the flow of fluids – liquids and gases. It has several subdisciplines, including aerodynamics
Fluid_dynamics
Angle between the chord of a wing and the undisturbed airflow
maximum lift coefficient. As the angle of attack increases further, the upper surface flow becomes more fully separated and the lift coefficient reduces further
Angle_of_attack
Motion characterized by chaotic changes in pressure and flow velocity
a flow is called "diffusivity". Turbulent diffusion is usually described by a turbulent diffusion coefficient. This turbulent diffusion coefficient is
Turbulence
Direct conversion of temperature differences to electric voltage and vice versa
{\displaystyle {\mathcal {K}}} is the Thomson coefficient. The Thomson effect is a manifestation of the direction of flow of electrical carriers with respect to
Thermoelectric_effect
Characteristic of rocket engine nozzles
overall efficiency of a rocket engine design. The thrust coefficient characterizes the supersonic flow in the expansion section downstream of the nozzle throat
Thrust_coefficient
Compressible flow velocity limiting effect
Choked flow is a compressible flow effect. The parameter that becomes "choked" or "limited" is the fluid velocity. Choked flow is a fluid dynamic condition
Choked_flow
Statistical measure of association for two binary variables
In statistics, the phi coefficient, also known as the mean square contingency coefficient or Yule coefficient of correlation and commonly denoted by φ
Phi_coefficient
the sail stalls and promotes flow separation. Each type of sail, acting as an airfoil, has characteristic coefficients of lift (CL ) and lift-induced
Forces_on_sails
Ratio of useful heating or cooling provided to work required
The coefficient of performance or COP (sometimes CP or CoP) of a heat pump, refrigerator or air conditioning system is a ratio of the useful heating or
Coefficient_of_performance
Phenomenon of non-ideal fluids changing temperature
McBain, S.E.; Saville, G. (1995). "A flow calorimeter for the measurement of the isothermal Joule–Thomson coefficient of gases at elevated temperatures and
Joule–Thomson_effect
Internal combustion engine component
resistance to flow. If the holes are regularly placed, then the relationship between the position of the valve and the flow coefficient (Cv) (the flow rate per
Choke_valve
Equation for the force of drag
cylinders and plates held transverse to the flow direction, this equation is applicable with the drag coefficient as a constant value when the Reynolds number
Drag_equation
Force resisting sliding motion
pavement has a high coefficient of friction. Coefficients of friction range from near zero to greater than one. The coefficient of friction between two
Friction
Physical law relating heat loss to temperature difference
and its environment. The (constant) coefficient of this proportional relationship is called heat transfer coefficient. The law applies only when the nature
Newton's_law_of_cooling
Equations for calculations of the Darcy friction factor
in pipe flow as well as open-channel flow. The Darcy friction factor is also known as the Darcy–Weisbach friction factor, resistance coefficient or simply
Darcy friction factor formulae
Darcy_friction_factor_formulae
Class of flumes
as Q = C H a n {\displaystyle Q=CH_{a}^{n}} Where Q is flow rate C is the free-flow coefficient for the flume Ha is the head at the primary point of measurement
Palmer-Bowlus_Flume
Study of hydraulic flow in thermal fluids
difference between the wall and bulk flow can be obtained from the heat transfer coefficient. The heat transfer coefficient depends on several factors: mode
Thermal_hydraulics
like the Gini coefficient and specific income ratios. Income from black market economic activity is not included. The Gini coefficient is a number between
List of countries by income inequality
List_of_countries_by_income_inequality
Aerodynamic power limitation for wind turbines
kinetic energy in wind. The factor 16/27 (0.593) is known as Betz's coefficient or the Betz limit. Practical utility-scale wind turbines achieve at peak
Betz's_law
Machine for exchanging energy with a fluid
They allow a comparison of flow machines with different dimensions and boundary conditions. Pressure range ψ Flow coefficient φ (including delivery or volume
Turbomachinery
Physical measure of overcoming air resistance
equals the m⁄A term in the Ballistic Coefficient formula. Note that "angled cube", in this case, means the flow is perpendicular to an edge, not a corner
Ballistic_coefficient
River in Turkey
sources, it does not dry completely in summer. Its length is 60 km. The flow coefficient is 0.141. In the permeable terrain with Tuff, the majority of precipitation
Melendiz_River
Type of aerodynamic or hydrodynamic drag
drag coefficient of low-Reynolds-number turbulent boundary layers. Compared to laminar flows, the skin friction coefficient of turbulent flows lowers
Skin_friction_drag
Type of fluid
passing through the origin, the constant of proportionality being the coefficient of viscosity. In a non-Newtonian fluid, the relation between the shear
Non-Newtonian_fluid
Type of fluid
Newtonian fluid is a fluid in which the viscous stresses arising from its flow are at every point linearly correlated to the local strain rate—the rate
Newtonian_fluid
Used to assess the predictive power of hydrological models
bias and variance terms. Coefficient of determination Kling–Gupta efficiency Nash, J. E.; Sutcliffe, J. V. (1970). "River flow forecasting through conceptual
Nash–Sutcliffe model efficiency coefficient
Nash–Sutcliffe_model_efficiency_coefficient
Mathematical description of fluid movements
Permeability: Generalization of the Reflection Coefficient Method of Describing Volume and Solute Flows". Biophysical Journal. 12 (4): 414–419. Bibcode:1972BpJ
Starling_equation
Type of resistor whose resistance varies with temperature
Negative-temperature-coefficient (NTC) thermistors have less resistance at higher temperatures, while positive-temperature-coefficient (PTC) thermistors
Thermistor
Rate constant in engineering
In engineering, the mass transfer coefficient is a diffusion rate constant that relates the mass transfer rate, mass transfer area, and concentration
Mass_transfer_coefficient
free-flow coefficient K is the free-flow length coefficient for the flume H is the head at the primary point of measurement n is the free-flow exponent
Cutthroat_flume
Analysis and solving of problems that involve fluid flows
solve problems that involve flows. Computers are used to perform the calculations required to simulate the free-stream flow of the fluid, and the interaction
Computational_fluid_dynamics
Fluid dynamics study of flow distribution in parallel channels
; Gao, Z.L.; Gan, G.H.; Wu, D.D. (2001). "Analytical solution of flow coefficients for a uniformly distributed porous channel". Chemical Engineering
Flow distribution in manifolds
Flow_distribution_in_manifolds
Equations of motion for viscous fluids
in incompressible flows it can depend on density and on pressure. Any equation that makes explicit one of these transport coefficient in the conservative
Navier–Stokes_equations
Method of calculating heat transfer in flow systems
exchanger. For a given heat exchanger with constant area and heat transfer coefficient, the larger the LMTD, the more heat is transferred. The use of the LMTD
Logarithmic mean temperature difference
Logarithmic_mean_temperature_difference
Popular modification of standard Parshall flume
as Q = C H a n {\displaystyle Q=CH_{a}^{n}} Where Q is flow rate C is the free-flow coefficient for the flume Ha is the head at the primary point of measurement
Montana_flume
Mathematical coefficient used in mass transfer calculations
out-flow concentrations (post-mass transfer) of the mass donating and receiving stream are equal to one another. Systems with sieving coefficient that
Sieving_coefficient
Paradox by d'Alembert on fluid dynamics
larger than predicted: for a flat plate perpendicular to the flow the predicted drag coefficient is CD=0.88, while in experiments CD=2.0 is found. This is
D'Alembert's_paradox
Pump driven by a gas turbine
selecting desired inducer performance parameters (flow coefficient, hub-tip ratio, suction margin, flow margin) and then finding shaft speed from this as
Turbopump
Ball used in the sport of golf
dimples, maximum launch speed from test apparatus (generally defining the coefficient of restitution) and maximum total distance when launched from the test
Golf_ball
Equation for force on an object in sea waves
the inertia and drag coefficients can be tuned to give the correct extreme values of the force. Third, when extended to orbital flow which is a case of
Morison_equation
Relationships between equipment performance and power
pump discharge and head coefficient dimensionless numbers. For a given pump, one can compute the discharge and head coefficients as follows: C d = Q n D
Affinity_laws
In fluid dynamics, aerodynamic potential flow codes or panel codes are used to determine the fluid velocity, and subsequently the pressure distribution
Aerodynamic potential-flow code
Aerodynamic_potential-flow_code
Technique for the generative modeling of a continuous probability distribution
variables) samples from N ( 0 , I ) {\displaystyle {\mathcal {N}}(0,I)} . The coefficients 1 − β t {\displaystyle {\sqrt {1-\beta _{t}}}} and β t {\displaystyle
Diffusion_model
Resistance of a fluid to shear deformation
applies to general flows, it is easy to visualize and define in a simple shearing flow, such as a planar Couette flow. In the Couette flow, a fluid is trapped
Viscosity
Lift coefficient (CL or CZ) (aerodynamics) (dimensionless) - Relates the lift generated by an airfoil with the dynamic pressure of the fluid flow around
Physical_coefficient
Narrowest point in a fluid stream
though they are still not highly sought after.[citation needed] The coefficient of contraction is defined as the ratio between the area of the jet at
Vena_contracta
Heat transfer due to the movement of fluid
and flow situations. Conjugate convective heat transfer Convection Forced convection Natural convection Mixed convection Heat transfer coefficient Heat
Convection_(heat_transfer)
Where a fluid's velocity is zero
the pressure coefficient C p {\displaystyle C_{p}} at stagnation points is +1. On a streamlined body fully immersed in a potential flow, there are two
Stagnation_point
Air conditioning system that allows for individual control of spaces
Variable refrigerant flow (VRF), is an HVAC technology invented by Daikin Industries, Ltd. in 1982. Daikin Industries, Ltd. named this "VRV" and holds
Variable_refrigerant_flow
Computational problem in graph theory
maximum flow problems involve finding a feasible flow through a flow network that obtains the maximum possible flow rate. The maximum flow problem can
Maximum_flow_problem
Wing shape
design lift coefficient of 0.4 and maintains laminar flow for lift coefficients between 0 and 0.8. Further advancement in maximizing laminar flow achieved
NACA_airfoil
Material property relevant for characterizing fluid flow
dilatational viscosity) is a material property relevant for characterizing fluid flow. Common symbols are ζ , μ ′ , μ b , κ {\displaystyle \zeta ,\mu ',\mu _{\mathrm
Volume_viscosity
Airfoil designed primarily to delay the onset of wave drag in the transonic speed range
is generated, which increases the pressure coefficient to the critical value Cp-crit, where the local flow velocity will be Mach 1. The position of this
Supercritical_airfoil
Quantities describing probability of absorption or emission of light
Einstein coefficients are quantities describing the probability of absorption or emission of a photon by an atom or molecule. The Einstein A coefficients are
Einstein_coefficients
Lab technique in biology and chemistry
Flow cytometry (FC) is a technique used to detect and measure the physical and chemical characteristics of a population of cells or particles. In this
Flow_cytometry
Equation on water flow in pipes
gauge pressure) L = length of pipe in feet Q = flow, gpm (gallons per minute) C = pipe roughness coefficient d = inside pipe diameter, in (inches) Note:
Hazen–Williams_equation
Statistical measure
mean square deviation (NRMSD), coefficient of variation (CV), and percent RMS are used to quantify the uniformity of flow behavior such as velocity profile
Root_mean_square_deviation
Reactor simulation model
ν is the stoichiometric coefficient, dimensionless r is the volumetric source/sink term (the reaction rate), mol/m3s. The flow linear velocity, u (m/s)
Plug_flow_reactor_model
Graph where most nodes are reachable in a small number of steps
A small-world network is a graph characterized by a high clustering coefficient and low distances. In an example of a social network, high clustering
Small-world_network
Dimensionless parameter in chemistry
{\displaystyle u} : flow velocity L {\displaystyle L} : length of the reactor D a x {\displaystyle D_{\mathrm {ax} }} : axial dispersion coefficient It can also
Bodenstein_number
One of the types of serves in the game of volleyball
drag coefficient and drag also decreases, which causes more sporadic motion. There is also a number used to predict the beginning of turbulent flow. This
Float_serve
Quantification of bulk fluid movement
used to measure flow rate in the transmission of gas through pipelines, and has been used since Roman Empire times. The coefficient of discharge of Venturi
Flow_measurement
Machine learning software library
TensorFlow is a software library for machine learning and artificial intelligence. It can be used across a range of tasks, but is used mainly for training
TensorFlow
Equation in fluid dynamics
empirical loss coefficient, which is dimensionless and has a value between zero and one, 0 ≤ ξ ≤ 1, ρ is the fluid density, v1 and v2 are the mean flow velocities
Borda–Carnot_equation
{\displaystyle C_{L}} is lift coefficient C d {\displaystyle C_{d}} is the drag coefficient β 1 {\displaystyle \beta _{1}} is the inlet flow angle on the airfoil
Blade_solidity
River is 640 km2, the average rate or modulus of 5.4 m3 ⋅ / s and the flow coefficient of 20.5%. Gonomy, Nyankona. "Problematique de la gestion de l'eau en
Grande_Rivière_du_Nord
Mathematical concept applicable to physics
the particles. In turbulent flows, the transport by eddy motion can be expressed as a grossly increased diffusion coefficient. In quantum mechanics, particles
Flux
Study of heat conduction between solid bodies
or liquid bodies in thermal contact. The thermal contact conductance coefficient, h c {\displaystyle h_{c}} , is a property indicating the thermal conductivity
Thermal_contact_conductance
Geological phenomenon
natural debris flows. For neutrally buoyant flows, Coulomb friction disappears, the lateral solid pressure gradient vanishes, the drag coefficient is zero,
Debris_flow
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FLOW COEFFICIENT
FLOW COEFFICIENT
FLOW COEFFICIENT
FLOW COEFFICIENT
FLOW COEFFICIENT
FLOW COEFFICIENT
FLOW COEFFICIENT
FLOW COEFFICIENT
FLOW COEFFICIENT
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