Authors: Fester, VG; Kabwe, AM; Slatter, PT


Cite As:
Fester, VG, Kabwe, AM & Slatter, PT 2011, 'Diaphragm valve head loss coefficients for coarse particles transported in a non-Newtonian carrier fluid', in R Jewell & AB Fourie (eds), Paste 2011: Proceedings of the 14th International Seminar on Paste and Thickened Tailings, Australian Centre for Geomechanics, Perth, pp. 417-426,

Download citation as:   ris   bibtex   endnote   text   Zotero

The head loss coefficients for coarse particles in water have been tested in turbulent flow in various types of fittings and valves (Turian et al., 1983) and it was found that they are the same as that for water only. This has not been done for coarse particles in a non-Newtonian carrier fluid to date, particularly in laminar flow. Efficient design is only possible if reliable loss coefficient data are available. For paste slurries which are in use in many industrial settings, this situation is exacerbated by the necessity to use less water, resulting in laminar flow designs becoming more common. In many applications, these pastes could contain coarse particles. The use of diaphragm valves is common in the mineral processing industries. The objective of this work is to evaluate the head loss coefficients for coarse particles transported in a non-Newtonian carrier in a diaphragm valve in laminar, transitional and turbulent flow. A silica sand-kaolin slurry was tested at various concentrations in a diaphragm valve. This work provides important information on the behaviour of coarse particles in a non-Newtonian carrier fluid when flowing through a diaphragm valve.

Charles, M.E. and Charles, R.A. (1971) Advances in solid-liquid flow and its applications, I. Zanid (ed), New York: Pergamon Press.
Cooke, R. (2002) Laminar flow settling: the potential for unexpected problems, in Proceedings 15th International Conference Hydraulic Transport of Solids: Hydrotransport 15, Banff, AB, Canada, BHR Group, Cranfield, UK, pp. 121–133.
Coussot, P. and Piau, J.M. (1995) The effects of an addition of force free particles on the rheological properties of fine suspensions, Canadian Geotechnical Journal, Vol. 32, pp. 263–270.
Crane Co. (1999) Flow of fluids through valves, fittings and pipes: metric edition – SI units, Technical paper no. 410M, London: Crane Co.
Duckworth, R.A., Pullum, L., Addie, G.R. and Lockyear, C.F. (1986) Pipeline transport of coarse materials in a non-Newtonian carrier fluid, Hydrotransport 10, Paper C2, pp. 69–68.
Edwards, M.F., Jadallah, M.S.M. and Smith, R. (1985) Head losses in pipe fittings at low Reynolds numbers, Chemical Engineering Research and Design, January, Vol. 63, pp. 43–50.
Ghosh, T. and Shook, A. (1990) Freight pipelines, H. Liu and G.F. Round (eds), Washington DC: Hemisphere.
Hooper, W.B. (1981) The two-K method predicts head loss in pipe fittings, Chemical Engineering, Vol. 96–100, August.
Kabwe, A.M., Fester, V.G. and Slatter, P.T. (2010) Prediction of non-Newtonian head losses through diaphragm valves at different opening positions, Chemical Engineering Research and Design, Vol. 88, pp. 959–970.
Massey, B.S. (1970) Mechanics of fluids, 2nd edition, London, van Nostrand Reinhold.
Miller, D.S. (1990) Internal flow systems, 2nd edition, BHRA (Information Services), The Fluid Engineering Centre, Cranfield, UK.
Paulsen, E., Sumner, R.J. and Sanders, R.S. (2010) The effect of coarse particle addition on the rheology of fine clay slurries, British Hydromechanics Research Group 18th International Conference on Slurry Handling and Pipeline Transport, Hydrotransport 18, Rio de Janeiro, September 22–24.
Perry, R.H., Green, D.W. and Maloney, J.O. (1997) Perry’s Chemical Engineering Handbook, 7th edition, New York: McGraw-Hill.
Pullum, L., Graham, L., Rudman, M. and Hamilton, R. (2006) High concentration suspension pumping, Minerals Engineering, Vol. 19, Issue 5, April, pp. 471–477.
Pullum, L., Slatter, P.T., Graham, L. and Chryss, A. (2010) Are tube viscometer data valid for suspension flows? Korea-Australia Rheology Journal, Vol. 22, No. 3, September, pp. 163–168.
Slatter, P.T. and Fester, V.G. (2010) Fittings losses in Paste Flow Design, in Proceedings 13th International Seminar on Paste and Thickened Tailings (Paste2010), R.J. Jewell and A.B. Fourie (eds), 3–6 May 2010, Toronto, Canada, Australian Centre for Geomechanics, Perth, pp. 303–310.
Streeter, V.L. and Wylie, B. (1985) Fluid Mechanics, 6th edition, McGraw-Hill Inc., USA.
Turian, R.M., Hsu F.L. and Sami Selim, M. (1983) Friction losses for flow of slurries in pipeline bends, fittings, and valves, Hemisphere Publishing Corporation, Particulate Science and Technology, Vol. 1, pp. 365–392.

© Copyright 2024, Australian Centre for Geomechanics (ACG), The University of Western Australia. All rights reserved.
View copyright/legal information
Please direct any queries or error reports to