# Froude number

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Related to Froude number: Reynolds number, Euler number

## Froude number

(fraʊd)
n
(General Physics) a dimensionless number used in hydrodynamics for model simulation of actual conditions
[named after William Froude (1810–79), English civil engineer]
References in periodicals archive ?
GPS coordinates are in UTM, NAD83, Zone N15 LR-1 River Little River GPS Coordinates 0299358/3811669 Channel width [m] 14 Mean water depth [cm] 18.0 ([+ or -] 4.24 SD) Mean flow velocity [cm/s] 0.47 ([+ or -] 0.62 SD) Froude number 0.0035 Reynolds number 6500.08 Number of nets 34 Number of recaptured microparticles 168 LR-2 River Little River GPS Coordinates 0336540/3756900 Channel width [m] 17 Mean water depth [cm] 7.8 ([+ or -] 3.82) Mean flow velocity [cm/s] 14.75 ([+ or -] 6.91) Froude number 0.1687 Reynolds number 88502.39 Number of nets 36 Number of recaptured microparticles 155 KR-1 River Kiamichi River GPS Coordinates 0270114/3821052 Channel width [m] 43 Mean water depth [cm] 59.1 ([+ or -] 21.87) Mean flow velocity [cm/s] 0.87 ([+ or -] 1.19) Froude number 0.
Leg length (L) was measured (m) from the anterior superior iliac spine to the medial malleolus in order to derive Froude number (Fr) (Fr = [v.sup.2]/gxL: v = velocity, g = acceleration due to gravity, L =leg length) for each individual at each speed.
Notations A: Air vent area B: Radial gate width F: Froude number g: Acceleration of gravity H: Water depth in the gate chamber [h.sub.0]: Full opening height of the gate [h.sub.1]: Water depth upstream of hydraulic jump [h.sub.2]: Water depth downstream of hydraulic jump [h.sub.g]: Time-dependent gate opening m: Constant n: Constant [Q.sub.a]: Air flow discharge in the air vent [Q.sub.w]: Water flow discharge at the gate [V.sub.1]: Mean flow velocity upstream of hydraulic jump [V.sub.a]: Mean air flow velocity in the air vent [V.sub.w]: Mean flow velocity under the gate [alpha]: Relative difference of gate discharge [beta]: Ratio of air flow to water flow discharge [lambda]: Dimensionless vent area [xi]: Dimensionless gate opening [eta]: Relative discharge error.
Ghodsian [3] studied hydraulic characteristics of sharp crested triangular and results showed that Di Marchi's coefficient for this weir depends upon Froude number of main channel, apex angle, and weir height to upstream depth.
[B.sub.o] = Boiling number [C.sub.o] = Convection number [C.sub.p] = Specific heat [D.sub.h] = Hydraulic diameter F = Reynolds number factor [F.sub.fl] = Fluid-dependent parameter Fr = Froude number G = Mass flux g = Gravity h = Heat transfer coefficient [h.sub.fg] = Evaporative enthalpy J = Superficial velocity K = Heat-flux-fraction factor k = Thermal conductivity [L.sub.c] = Characteristic length n = Constant based on reduced pressure Nu = Nusselt number P = Pressure [P.sub.red] = Reduced pressure q" = Heat flux Re = Reynolds number S = Suppression factor Su = Suratman number We* = Modified Weber number x = Quality [X.sub.tt] = Lockhart-Martinelli parameter Z = Shah correlating parameter Subscripts
This suggests that the Froude number or the effect of velocity is critical consideration in terms of accurately modeling jet breakup behavior.
For noninteracting pool fires in cross-flows, flame length has been shown to increase linearly with the Froude number based on wind speed [22].
For liquid flow through a tube, a dimensionless parameter called the Froude number (FR) is used by engineers to determine the liquid flow velocity necessary to expel the air from the high and low points of the tubing.
The Bond number represents the ratio between the surface tension and the gravity force, and the Froude number represents the mean flow velocity relative to the velocity of the long wave.
Here, Heaven revealed a personal love of the Froude number. But why is it important?
The form drag is a function of the Froude number, ([C.sub.R](Fr)), defined as, equation (8):
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