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2. Sauter mean diameter - Wikipedia

   en.wikipedia.org/wiki/Sauter_mean_diameter

   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 ...

3. De Brouckere mean diameter - Wikipedia

   en.wikipedia.org/wiki/De_Brouckere_mean_diameter

   The De Brouckere mean diameter is the mean of a particle size distribution weighted by the volume (also called volume-weighted mean diameter, volume moment mean diameter. [1] or volume-weighted mean size [2]). It is the mean diameter, which is directly obtained in particle size measurements, where the measured signal is proportional to the ...

4. Particle-size distribution - Wikipedia

   en.wikipedia.org/wiki/Particle-size_distribution

   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

5. Diameter - Wikipedia

   en.wikipedia.org/wiki/Diameter

   Eratosthenes, who calculated the diameter of the Earth around 240 BC. Graph or network diameter – Length of shortest path between two nodes of a graph; Hydraulic diameter – Measure of a channel flow efficiency; Inside diameter* Semidiameter – Term in geometry; half of a shape's diameter; Sauter mean diameter – Average measure of ...

6. Particle size - Wikipedia

   en.wikipedia.org/wiki/Particle_size

   Weight-based particle size equals the diameter of the sphere that has the same weight as a given particle. Useful as hypothesis in centrifugation and decantation , or when the number of particles can be estimated (to obtain average particle's weight as sample weight divided by the number of particles in the sample).

7. Spray (liquid drop) - Wikipedia

   en.wikipedia.org/wiki/Spray_(liquid_drop)

   • Sauter Mean Diameter (SMD) or D32 Fineness of spray expressed in terms of surface area produced by the spray. Diameter of a drop with the same volume-to-surface area ratio as the total volume of all the drops to the total surface area of all the drops . • Volume Median Diameter (VMD) DV0.5 and Mass Median Diameter (MMD)

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9. Equivalent radius - Wikipedia

   en.wikipedia.org/wiki/Equivalent_radius

   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.