The friction factor is then used in the Darcy-Weisbach formula to calculate the fluid frictional loss in a pipe.
the velocity (u) is 2 m/s, the characteristic length (L) could be considered as the diameter of the pipe which is 0.1 m, and the viscosity ((mu)) of water is about 0.001 Pa·s. Plugging these values into the formula:
Flow in a circular pipe is investigated experimentally at Reynolds numbers higher than that at which the resistance coefficients calculated from the Blasius formula for laminar flow and from the Prandtl formula for turbulent flow are equal. The corresponding Reynolds number based on the mean-flow ...
α - Fluid velocity m/s D - Pipe diameter m ρ - Fluid density kg/m³ μ - Fluid dynamic viscosity Kg/(ms) Reynolds Number = 96 CALCULATE CALCULATE Home Engineering Mechanical Newtonian Fluid Reynolds Number (Re) calculator - formula & step by step calculation to find the similar flow ...
The expressions for the two terms simplify into a ratio that provides the Reynolds number formula: $$Re = \frac{\rho vd}{\mu} $$ with each of the variables having the following meanings: {eq}Re {/eq} is the Reynolds number, which is dimensionless. {eq}\rho {/eq} is the fluid de...
A formula for the drag exerted on a cloud of spherical particles of a given particle size distribution in low Reynolds number flow is derived. It is found that the drag experienced by a particle depends only on the first three moments of... CKW Tam - 《Journal of Fluid Mechanics》 被引...
or else the flow is laminar. The flow inmicrochannelsis generally laminar. For example, water flowing through a passage with a diameter of 10μm and a velocity of about 1mm/s, will have Re given by the above formula as ~0.01. So, in microfluidics one must deal with very low-dimensional...
A single-phase liquid flow frictional pressure drop -dP/dz1ϕ-f is given by Darcy's formula as: (46)-dPdz1ϕ-f=f1DHρfjf22 Jones (1976) introduced a modified Reynolds number NRe∗ to correlation the friction factor f for a laminar flow as: (47)f=64NRe∗ where the modified ...
In 1883 Osborne Reynolds injected ink into water in a short, clear pipe to observe its movement. His experiments showed that as the input water velocity increased, the flow went from laminar (smooth and predictable) to turbulent (unsteady and unpredictable) through the development of localized pat...