Particle Rosin-Rammler-Sperling-Bennett

Figure 3.4.14 Example of an ideal particle size distribution curve according to the Rosin-Rammler-Sperling-Bennett (RRSB) function for n = 1.3 ...

Rosin-Rammler-Sperling-Bennett Particle Size Distribution... 

The Rosin-Rammler-Sperling-Bennett (RRSB) particle size distribution is widely used for coal characterization. The basic formulation is... 

The coal particles can be tracked as parcels in an Eulerian-Lagrangian framework. Discrete phase model (DPM) are used to define the injected particles that enter the reactor. In the case of INCI, simulation values for axial velocity of -1.732 m/s and a radial velocity of -l.Om/s of the particles must be provided. If agglomeration is neglected, a maximum particle diameter of 0.1 mm, a mean diameter of 0.09 mm, and a minimum diameter of 0.001 mm are assumed according to a Rosin-Rammler-Sperling-Bennett distribution with a spread parameter of = 0.688 in 10 individual groups for fluid-bed coal (see also Section 3.12.3.3). Particles can be treated as nonspherical with a shape factor of 0.85. 

Other model distributions used are the normal distribution (Laplace-Gauss), for powders obtained by precipitation, condensation, or natural products (e.g., pollens) the Gates-Gaudin-Schuh-mann distribution (bilogarithmic), for analysis of the extreme values of fine particle distributions (Schuhmann, Am. Inst. Min. Metall. Pet. Eng., Tech. Paper 1189 Min. Tech., 1940) or the Rosin-Rammler-Sperling-Bennet distribution for the analysis of the extreme values of coarse particle distributions, e.g., in monitoring grinding operations [Rosin and Rammler,/. Inst. Fuel, 7,29-36 (1933) Bennett, ibid., 10, 22-29 (1936)]. 

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