# Reynolds number

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## Rey·nolds num·ber

(ren'ŏldz),
a dimensionless number that describes the tendency for a flowing fluid, such as blood, to change from laminar flow to turbulent flow or vice versa.
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## Reynolds,

Osborne, English physicist, 1842-1912.
Reynolds number - a dimensionless number that describes the tendency for a flowing fluid, such as blood, to change from laminar flow to turbulent flow or vice versa.
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From previous studies [30-33], it is well known that the characteristics of flow around an airfoil at low Reynolds numbers are considerably different from those at moderate and high Reynolds numbers.
The equilibrium position of the particle [Y.sub.eq], which is the vertical position of the particle to the width of the channel, at different Reynolds numbers (Re = 20, 40, 60, 80, 100, 120, 160, 180, and 200) is shown in Figure 2.
Toutip, "Inverse Multiquadric RBF in the Dual Reciprocity Boundary Element Method(DRBEM) for Coupled 2D Burgers' Equations at high Reynolds numbers," in Proceedings of the 19th International Annual Symposium on Computational Science and Engineering (ANSCSE19), vol.
Figures 12(a) and 12(b) show the relation of the TEF with the flow attack angle at various Reynolds numbers for the square channel heat exchanger inserted with wavy plates for V-Downstream and V-Upstream, respectively.
Here is some explanation of the changing conditions as flow rate and Reynolds numbers increase:
2012.Mixed convection flow and heat transfer across a square cylinder under the influence of aiding buoyancy at low Reynolds numbers. International Journal of Heat and Mass Transfer 55: 2601-2614.
At this point, it is important to emphasize that the standard coefficients in the velocity log-law in equation (9) have been intentionally used (k =0.41 and E=9.0) without modifications for low Reynolds number flows , so as to retain its applicability to flows at moderate and higher Reynolds numbers.
Later on, it has been observed during the analysis that the first dimensionless number [[PI].sub.1] is the Reynolds number measured during flutter and then called flutter Reynolds number.
The horizontal flow demonstrated an increasing linear trend as the main flow rate was also increasing (see Figure 2) whereas the ratio of the horizontal flow rate appeared to maintain the linear trend and did not significantly change when the Reynolds number was increasing (see Figure 4).
Results have shown that at certain Reynolds numbers (Re = 10 or 40 < Re [less than or equal to] 100) the left particle always sediments at 0.175 of the channel width irrespective of its initial position or the channel width.
Therefore, falling film remains stable even for the very small flow rate (liquid Reynolds number smaller than 1).
As shown in Figure 9(b), when the Kc number increases, the vertex of the curve approaches low Reynolds numbers. In the range of 5.5 to 6.7, the gradients of the curves are similar.

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