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In fluid dynamics, Sauter mean diameter (SMD) is an average measure of particle size. It was originally developed by German scientist Josef Sauter in the late 1920s. [1] [2] It is defined as the diameter of a sphere that has the same volume/surface area ratio as a particle of interest. Several methods have been devised to obtain a good estimate ...
λ: Gas mean free path (cm) D 50: Mass-median-diameter (MMD). The log-normal distribution mass median diameter. The MMD is considered to be the average particle diameter by mass. σ g: Geometric standard deviation. This value is determined mathematically by the equation: σ g = D 84.13 /D 50 = D 50 /D 15.87
Particle size is a notion introduced for comparing dimensions of solid particles (), liquid particles (), or gaseous particles ().The notion of particle size applies to particles in colloids, in ecology, in granular material (whether airborne or not), and to particles that form a granular material (see also grain size).
The most prominent examples are laser diffraction [3] and acoustic spectroscopy (Coulter counter). The De Brouckere mean is defined in terms of the moment-ratio system as, [,] = Where n i is the frequency of occurrence of particles in size class i, having a mean D i diameter. [2] Usually in logarithmic spaced classes, the geometric mean size of ...
This is equivalent to the above definition of the 2D mean diameter. However, for historical reasons, the hydraulic radius is defined as the cross-sectional area of a pipe A , divided by its wetted perimeter P , which leads to D H = 4 R H {\displaystyle D_{\text{H}}=4R_{\mathbb {H} }} , and the hydraulic radius is half of the 2D mean radius.
Clemson coach Dabo Swinney made his case for SMU in his postgame interview with ESPN's Molly McGrath. “That’s a playoff football team," Swinney said as he pointed across the field.
Kinetic diameter, a measure of particles in a gas related to the mean free path; Kinetic diameter (data), the algorithmic problem of keeping track of the diameter of a moving point set; Link diameter of a polygon, the number of segments needed to connect each two points in the polygon by a polygonal chain that stays inside the polygon
Luke Grimes says it's hard work to remain a Hollywood heartthrob — but that's not why he's committed to the gym.. The Yellowstone actor, 40, revealed to Men’s Health that he’s figuring out ...