Transversal pressure effect in circulative separators

• Autorzy: Sawicki J. M.

Identyfikatory

DOI

10.2478/v10203-012-0001-5

• Języki publikacji: EN

Abstrakty

EN

Progressive urban development of the human environment requires new methods of rain water treatment. Recently, there has been a growing interest in the improvement of gravitational suspension separation, and especially in the application of the centrifugal force. This important factor can be induced in two ways; by the circulation of the reservoir containing the fluid (centrifugal separators), or by a tangent supply of this reservoir (circulative separators). In addition to the centrifugal force, another essential transversal force is at work in this case, resulting from the local variability of the pressure. In the literature, this force is derived for centrifuge conditions, but applied also to circulative separators, which is questionable, as in the latter devices velocity and pressure fields are clearly different. The paper is devoted to the determination of the transversal pressure effect in circulative separators. First, a model of tangent and radial velocity profiles is introduced. The radial pressure distribution, calculated on this basis and verified experimentally, leads to the final result, that is, a technical formula describing the force in question.

Słowa kluczowe

EN

centrifugal force; cyclones; rotational separators; sedimentation; wastewater treatment

• Wydawca: Institute of Hydro-Engineering of Polish Academy of Sciences
• Czasopismo: Archives of Hydro-Engineering and Environmental Mechanics
• Rocznik: 2012
• Tom: Vol. 59, nr 1-2
• Strony: 3--12
• Opis fizyczny: Bibliogr. 11 poz., rys.

Twórcy

autor

Sawicki J. M.

• Gdańsk University of Technology, Faculty of Civil and Environmental Engineering, ul. Narutowicza 11/12, 80-233 Gdańsk, Poland,

Bibliografia

• 1. Beckenbach E. F. (1961) Modern Mathematics for the Engineer, McGraw Hill Book Comp., New York.
• 2. Imhoff K., Imhoff K. R. (1979) Taschenbuch der Stadtentwaeserung, R. Oldenburg Verlag, Vienna.
• 3. Landau L. D., Lifshitz E. M. (1987) Fluid Mechanics, Pergamon, Elmsford (NY).
• 4. Launder B. E., Spalding D. B. (1972) Lectures in Mathematical Models of Turbulence, Academic Press, London.
• 5. MartignoniW. P., Bernardo S., Quintani C. L. (2007) Evaluation of Cyclone Geometry and its Influence on Performance Parameters by CFD, Braz. Jour. Chem. Eng., 24, 1–17.
• 6. Slattery J. C. (1999) Advanced Transport Phenomena, University Press, Cambridge.
• 7. Smith J. L. (1959) Experimental and Analytical Study of the Vortex in the Cyclone Separator, MIT, Cambridge.
• 8. Soo L. S. (1966) Fluid Dynamics of Multiphase Systems, Blaisdell Publ. Comp., London.
• 9. Stairmand C. J. (1951) The Design and Performance of Cyclone Separators, Trans. Inst. Chem. Eng., 29, 356–373.
• 10. Trawinski H. (1969) Practical Aspects of the Design and Industrial Applications of the Hydrocyclones, Filtr. and Sep., 6, 361–367.
• 11. Wikipedia, the Free Encyclopedia (2010) Cyclonic Separation, http://en.wikipedia.org/wiki/Cyclonic--separation.