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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. 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

  4. Particle size - Wikipedia

    en.wikipedia.org/wiki/Particle_size

    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).

  5. 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 ...

  6. Diameter - Wikipedia

    en.wikipedia.org/wiki/Diameter

    Some authors prefer to treat the empty set as a special case, assigning it a diameter of , [4] which corresponds to taking the codomain of to be the set of nonnegative reals. For any solid object or set of scattered points in n {\displaystyle n} -dimensional Euclidean space , the diameter of the object or set is the same as the diameter of its ...

  7. Fix problems signing into your AOL account - AOL Help

    help.aol.com/articles/help-signing-in

    Try another web browser - If you can access your account in another browser, the problem isn't with your account; you'll need to fix the issue in your preferred browser. Someone changed your password - An unauthorized party could have broken in and changed your password. Use the Sign-in Helper to get back into your account and change your password.

  8. Prisoners of Profit - The Huffington Post

    projects.huffingtonpost.com/projects/prisoners...

    Soon, the same problems that had emerged at many of his institutions cropped up again, according to HuffPost’s review of state facility reports. In December 2003, a month before Slattery’s firm formally took over Thompson, state monitors noted that the company had yet to fill any of the direct-care staff positions , the guards who work most ...

  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.

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