DETERMINATION OF DYNAMIC COEFFICIENT OF FRICTION FOR SOME MATERIALS FOR FEED PELLET UNDER DIFFERENT VALUES OF PRESSURE AND TEMPERATURE

Ibrahim, Mohamed M.

doi:10.21608/mjae.2008.190274

DETERMINATION OF DYNAMIC COEFFICIENT OF FRICTION FOR SOME MATERIALS FOR FEED PELLET UNDER DIFFERENT VALUES OF PRESSURE AND TEMPERATURE

Document Type : Original Article

Author

Mohamed M. Ibrahim

* Assist. Prof., Ag. Eng. Dept., Faculty of Agriculture, Cairo University, Egypt.

10.21608/mjae.2008.190274

Abstract

Knowledge of frictional characteristics of materials is required for equipment design. The force of friction must be overcome before these materials flow. The objective of this study is to determine the dynamic coefficient of friction "μd" for yellow corn grits, wheat bran, soybean meal, cotton seed meal and mixtures of some of these materials used for manufacturing pellet for cattle animals, under different values of pressure and temperature. A device was developed for determining the dynamic coefficient of friction under pressure ranging from 9 kPaup to 109 kPa and temperature ranging from 30 to 150 ^oC. The value of "μd" was determined at ten levels of pressure "P": 9, 18, 27, 42, 53, 65, 75, 88, 97 and 109 kPa, and six levels of the temperature "T": 30, 50, 75, 100, 125 and 150 ^oC.
The determined values of "μd" ranged from 0.113 to 0.397 for Yellow corn grits, from 0.122 to 0.505 for wheat bran, from 0.105 to 0.410 for cotton seed meal, from 0.105 to 0.347 for soybean meal and from 0.391 to 0.105 for mixtures of these materials.
The empirical results obtained from the carried out experiments were used to introduce a group of contour charts, using "Excel program" to predict the value of "μd" for the different tested material as a function of both pressure and temperature. These empirical results were also used to derive six mathematical equations to predict the value of "μd" as a function of both pressure and temperature. Also, one general mathematical equation was derived to predict the value of "μd" as a function of raw material contents (protein, ash and moisture content), material pressure and temperature.

Keywords

Main Subjects

Processing Engineering of Agricultural Products

References

Ahmadi H., Fathollahzadeh H. and Mobli H. 2008. Some Physical and Mechanical Properties of Apricot Fruits, Pits and Kernels (C.V Tabarzeh). American-Eurasian J. Agric. & Environ. Sci., 3 (5): 703-707.

ASAE Standards, 47th Ed. 2002. S319.3 – Method of determining and expressing fineness of feed materials by sieving. 573-576. St. Joseph, Mich. ASAE.

Fairfield D. A. 2003. Pelleting for Profit - Part 2. National Grain and Feed Association (Feed and Feeding Digest) Volume 54, Number 7, December 22.

Faruk Taser, O., E. Altuntas and E. Ozgoz. 2005. Physical Properties of Hungarian and Common Vetch Seeds. Journal of Applied Sciences 5 (2): 323-326.

Ghadge P. N., P. R. Vairagar, K. Prasad. 2008. “Physical Properties of Chick Pea Split (Cicer arietinum L.)” Agricultural Engineering International: the CIGR Ejournal. Manuscript FP 07 039. Vol. X. January, 2008.

Grift T.E.; G. Kweon; J.W. Hofstee; E. Piron; S. Villette. 2006. Dynamic Friction Coefficient Measurement of Granular Fertiliser Particles. Biosystems Engineering (2006) 95 (4), 507–515.

Halling, J. 1975. Principles of Tribology. Printed in Great Britain by Tinling (1973) Ltd, Prescot, Merseyside.

Miguel, G. and M. Guillermo. 2002. Experimental determination of the optimal parameters of the mechanical densification process of fibrous materials for animal feed. ASAE Annual International Meeting / CIGR XVth World Congress Sponsored by ASAE and CIGR Hyatt Regency Chicago, Illinois, USA, July 28-July 31.

Mohsenin, N. N. 1970. Physical Properties of Plant and Animal Materials. Gordon and Breach Sc. Pub., N. Y.

Molenda, M., J. Horabik, I. J. Ross and M. D. Montross. 2002. Friction of wheat: grain- on-grain and on corrugated steel. Transactions of the ASAE Vol. 45(2): 415–420.

NRC. (2001). Nutrient Requirement of Dairy Cattle. NationalAcademy Press, NY, Washington , DC .

Rosentrater, K. A., T. L. Richard, C. J. Bern and R. A. Flores. 2005. Small scale extrusion of corn masa byproducts. Cereal Chem. 82(4): 436-446.

Rusinek R., M. Molenda. 2007. Static and kinetic friction of rapeseed. AGR. ENG. RES., 53, 2007 (1): 14–19.

Shukla, C. Y., K. Muthukumarappan and J. L. Julson. 2005. Effect of single screw extruder die temperature, amount of distillers dried grains with soluble (DDGS) and initial moisture content on extrudates. Cereal chem. 82(1): 34-37.

Thompson S.A., I.J Ross. 1983. Compressibility and frictional coefficient of wheat. Transactions of the ASAE, 26: 1171–1176.