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 of the SMD.
^Sauter, Josef (1926). Die Grössenbestimmung der in Gemischnebeln von Verbrennungskraftmaschinen vorhandenen Brennstoffteilchen [The determination of the size of the fuel particles present in the mixture mist of internal combustion engines] (in German). VDI publishing house. ISSN 0042-174X. OCLC 1070480151.
^Wang, D.; Fan, L.-S. (2013). "Particle characterization and behavior relevant to fluidized bed combustion and gasification systems". In Scala, Fabrizio (ed.). Fluidized Bed Technologies for Near-Zero Emission Combustion and Gasification. Elsevier. pp. 42–76 [p. 45]. doi:10.1533/9780857098801.1.42. ISBN 9780857095411.
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