Reynolds number

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Reynolds number

n
(General Physics) a dimensionless number, vρl/η, where v is the fluid velocity, ρ the density, η the viscosity and l a dimension of the system. The value of the number indicates the type of fluid flow
[C19: named after Osborne Reynolds (1842–1912), British physicist]
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References in periodicals archive ?
The secret to BIG-nano's breakthrough technology is its capability to operate at high Reynolds numbers. Our nonwoven manufacturing process is powered like a jet engine, permitting us to achieve high jetting speeds and high Reynolds number.
Since blade elements operate at various Reynolds numbers and angle of attacks, it is efficient to construct the set of aerodynamic data in advance.
[7] reported that the particles fluctuate about an averaged position at low Reynolds numbers while they converge to an equilibrium position on each side of the channel center at high Reynolds numbers.
Nevertheless, it can be clearly seen that, with the reasons previously mentioned, most studies are concerned only with only cases of relatively low Reynolds numbers, i.e., 1 [less than or equal to] Re [less than or equal to] 500.
The variation of the f/[f.sub.0] with the flow attack angle for the square channel heat exchanger inserted with wavy plate at various Reynolds numbers is depicted as Figures 11(a) and 11(b), respectively, for V-Downstream and V-Upstream.
We decided to record video segments of the flow at several different Reynolds numbers. Also, we wanted to display the Reynolds number for each corresponding flow condition.
Effect of thermal buoyancy on vortex shedding behind a square cylinder in cross flow at low Reynolds numbers. International Journal of Heat and Mass Transfer 54: 5262-5274.
This kind of industrial applications is challenging for computational fluid dynamics (CFD) as coolant flow properties give rise to a wide range of molecular Prandtl numbers, at the same time being associated with relatively low Reynolds numbers. Reynolds-averaged Navier-Stokes (RANS) computations of heat transfer involving wall bounded flows at elevated Prandtl numbers suffer from a lack of accuracy and/or increased mesh dependency.
The projection of this map to 3-dimensional space on Figure 6 shows the characteristic of the flutter Reynolds numbers [[PI].sub.1] as a function of flutter fluid structure interaction numbers [[PI].sub.2], with the geometric ratios as the correcting factors.
The details of the correlation that exists between the cross flow ratio and the corresponding Reynolds numbers ([Re.sub.corresponding]) are shown in Figure 4.
Figure 10 shows the instantaneous vorticity contour at different Reynolds numbers, displaying totally four falling patterns in the simulations.
Reynolds numbers for air and falling film are defined as: