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In fluid dynamics, Sauter mean diameter (SMD, d32 or D[3, 2]) is an average of particle size. It was originally developed by German scientist Josef Sauter in the late 1920s. 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 of the SMD. SMD is typically defined in terms of the surface diameter, ds: and volume diameter, dv: If the actual surface area, Ap and volume, Vp of the particle are known the equation simplifies further:

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  • Der Sauterdurchmesser ist eine Kenngröße einer Partikelgrößenverteilung. Er ist wie folgt definiert: würde man das gesamte Volumen der Partikel einer Schüttung in gleich große Kugeln umformen, deren Volumen- zu Oberflächenverhältnis wiedergegeben werden soll, so hätten diese Kugeln den Sauterdurchmesser. (de)
  • Le diamètre de Sauter a été développé par le scientifique allemand J. Sauter dans les années 1920. Il est utilisé pour caractériser des particules au même titre que le d10, d50 et le d90. Il est défini comme le diamètre d'une sphère ayant le même ratio volume/surface que la particule qu'elle doit représenter. (fr)
  • In fluid dynamics, Sauter mean diameter (SMD, d32 or D[3, 2]) is an average of particle size. It was originally developed by German scientist Josef Sauter in the late 1920s. 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 of the SMD. SMD is typically defined in terms of the surface diameter, ds: and volume diameter, dv: where Ap and Vp are the surface area and volume of the particle, respectively. If ds and dv are measured directly by other means without knowledge of Ap or Vp, Sauter diameter for a given particle is If the actual surface area, Ap and volume, Vp of the particle are known the equation simplifies further: This is usually taken as the mean of several measurements, to obtain the Sauter mean diameter, SMD:This provides intrinsic data that help determine the particle size for fluid problems. (en)
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  • Der Sauterdurchmesser ist eine Kenngröße einer Partikelgrößenverteilung. Er ist wie folgt definiert: würde man das gesamte Volumen der Partikel einer Schüttung in gleich große Kugeln umformen, deren Volumen- zu Oberflächenverhältnis wiedergegeben werden soll, so hätten diese Kugeln den Sauterdurchmesser. (de)
  • Le diamètre de Sauter a été développé par le scientifique allemand J. Sauter dans les années 1920. Il est utilisé pour caractériser des particules au même titre que le d10, d50 et le d90. Il est défini comme le diamètre d'une sphère ayant le même ratio volume/surface que la particule qu'elle doit représenter. (fr)
  • In fluid dynamics, Sauter mean diameter (SMD, d32 or D[3, 2]) is an average of particle size. It was originally developed by German scientist Josef Sauter in the late 1920s. 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 of the SMD. SMD is typically defined in terms of the surface diameter, ds: and volume diameter, dv: If the actual surface area, Ap and volume, Vp of the particle are known the equation simplifies further: (en)
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  • Sauterdurchmesser (de)
  • Diamètre de Sauter (fr)
  • Sauter mean diameter (en)
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