Reynolds powder

Reynolds Powder. A white powder which ignited more easily than BlkPdr, It consisted of "chlorate of cotton 75 and sulfourea , CS(NH2)2j 25%. The latter component was obtained as a by-product in the fabrication of illuminating gas. 

Alumina Product Data Bulletins L o. CHE920, CHE 922, Alcoa, Bauxite, Arkansas Alcoa Chemie, Lausanne, Switzerland Alcan Chemicals, Qeveland, Ohio Kaiser Chemicals, Cleveland, Ohio Malakoff Industries (Reynolds), Malakoff, Texas Baikowski, Charlotte, North Carolina Criceram (Pechiney), Cedex, Prance Union Carbide Specialty Powders, IndianapoHs, Indiana Sumitomo Aluminum Smelting, Tokyo, Japan Showa Alumina Industries SAL, Tokyo, Japan VAW Aluminum, Germany Martinswerke, Germany Pechiney, Prance Arco Specialty Chemicals, Newton Square, Pennsylvania. 

Some other correlations that have been specifically developed for liquid metals include those proposed by Nichiporenko)488 Schmitt)489 Thompson)491 and Date et al)494] Nichiporenkol488 correlated the diameter of particles (powder) of predominant fraction, D h with the arithmetic mean particle diameter (linear average diameter), Z)10, and the Reynolds number as well as the Weber... 

Figure 7 Flow along an artificial cavitation at low Reynolds number (visualized using aluminum powder). Flow is from left to right. Source Adapted from Ref. 13, Sec. 12.4 (original by Taneda S. J Phys Soc Jpn 1979 46 1935).

Based on these data, particle-liquid Reynolds numbers were calculated to range from Re = 25 (50 rpm) to Re = 90 (150 rpm) for coarse grade particles with a median diameter of 236 pm. In contrast, Reynolds numbers for a batch of micronized powder of the same chemical entity with a median diameter of 3 pm were calculated to be significantly lower (Re < 1), indicating less sensitivity towards convective hydrodynamics [(10), Chapter 12.3.8]. Based on the aforementioned considerations for spheres, bulk Reynolds numbers of about Re > 50 appear to be sufficient to produce the laminar-turbulent transition around a rough drug particle of coarse grade dimensions. 

SL Reynolds, HJ Judd. Rapid procedure for the determination of vitamins A and D in fortified skimmed milk powder using high-performance liquid chromatography. Analyst 109 489-492, 1984. 

RATO rocket assisted take off, called also "booster rocket" more common name is JATO RES Reynolds Experimental Station, of Atlas Powder Co, Tamaqua, Pa... 

To test the validity of the theoretical analyses of the kinetics of formation of alumina ceramics, Wagh et al [17] conducted an experimental investigation of alumina and phosphoric acid slurry. They used a mixture of coarser and finer alpha-alumina to obtain good packing. The coarser alumina was supplied by Reynolds Chemical Company. Its mean particle size was 0.96 mm. Alumina from Fisher Scientific, sieved to a mean particle size of 0.08 mm, was combined with this powder and 50 wt% phosphoric acid solution to produce a mixture of AI2O3 and H3PO4 with a weight ratio of five. 

Because the friction factor, f, is also a function of the Reynolds number, this requires a trial and error solution. For the case where the Re5molds number is between 1,000 and 200,000, the friction factor, f, has a nearly constant value of 0.44 and is not a strong function of Rejmolds number. For ceramic powders, such a high Reynolds number is rarely observed even in centrifugation at hi rpm. 

An existing 10,000-gal reactor can be evaluated for scaleup. By the above method, the turbulent Reynolds number for the proposed vessel can be found. Using the pilot-scale apparent viscosity, the laminar Reynolds number at endpoint can be set, and with the use of the reactor s mixing curve, the new power number and agitator powder draw can be calculated. 

When corrections for gross vortexing, geometric dissimilarities, and powder bed height variation were made, data from all mixers (Fielder PMA 25, 100 and 600 L) correlated to the extent that allows predictions of the optimum end-point conditions. The linear regression of Newton number (power) on the product of adjusted Reynolds number, Froude number, and the Geometric number (in log/log domain) yields (Fig. 12) an equation of the form ... 

Fu J. Cheong YS. Reynolds GK. Adams MJ. Salman AD, Hounslow MJ. An experimental study of the variability in the properties and quality of wet granules. Powder Technol 2004 I40(3) 209-16. 

Reynolds G, Biggs CA. Salman AD. Hounslow MJ. Non-uniformity of binder distribution in high-shear granulation. Powder Tech 2004 l40(3) 203-8. 

Benyahia S, Syamlal M, O Brien T (2006) Extension of Hih-Koch-Ladd drag correlation over all ranges of Reynolds number and solids volume fraction. Powder Technology 162 166-174... 

Tenneti, S., Garg, R., Hrenya, C. M., Fox, R. O. Subramaniam, S. 2010 Direct numerical simulation of gas-solid suspensions at moderate Reynolds number quantifying the coupling between hydrodynamic forces and particle velocity fluctuations. Powder Technology 203, 57-69. 

Corbett, R. P., The Influence of Powder Resistivity and Particle Size on the Electrostatic Powder Coating Process," in Elektrostatische Aufladung. Dechema-Monographien Nr. 1370-1409, DECHEMA, Frankfourt, 1974, pp. 261-271. Cotroneo, J. A. and G. M. Colver, Electrically Augmented Pneumatic Transport of Copper Spheres at Low Particle and Duct Reynolds Numbers, J. Electrostatics, 5, 1978, pp. 205-223. 

Bish, D. L. R. C. Reynolds, 1989. Sample preparation for X-ray diffraction. In Bish, D. L. J. E. Post (eds.) Modern Powder Diffraction. Mineralogical Society of America, Reviews in Mineralogy, Volume 20 73-100. 

The characteristic dimension of fluid flow in a tube is the diameter, d. It is the particle diameter in fluid-powder systems, dp. In square ducts, it is the hydraulic radius, rn- Note that the notion of turbulence and laminar flow for particles as well as the values of the Reynolds number are quite different compared to flow through pipes and ducts. 

---