MOISTURE DEPENDENCE OF SOME AERODYNAMIC PROPERTIES OF BENISEED
Abstract
Some aerodynamic properties of two varieties of beniseed (Yandev 55 and E8) were determined at moisture content levels of 5.3, 10.6, 16.1 22.4, 28.3 per cent (wet basis). The determined properties were particle diameter, frontal area, terminal velocity and drag coefficients. A - 2 x 5 factorial experiment in Completely Randomized Design with a total of 30 observations was used for each of the parameters. The particle diameter and frontal area increased from 1.52 to 1.78mm and 1.77 to 2.49 mm2 for Yandev 55; 1.74 to 2.18 mm and 2.38 to 3.73 mm2 for E8 respectively as the moisture content increased from 5.3 to 28.3%. The respective terminal velocities decreased from 3.05 to 2.74m/s and 2.80 to 2.48m/s for Yandev 55 and E8 within the studied moisture content levels. Increasing the moisture content from 5.3 to 16.10% increased the drag coefficient from 2.67 to 2.70 and 2.74 to 2.78 for the two accessions respectively. A further increase to 22.4% decreased the respective values to 2.64 and 2.61. The effect of moisture content on beniseed was highly significant on the terminal velocity.
References
Akinoso, R., Igbeka, J.C., Olayanju, T.M.A. 2006. Process Optimisation of Oil Expression from Sesame Seed (Sesamum indicum Linn.). Agricultural Engineering International – the CIGR Ejournal, Manuscript FP06 011. VIII: December, 7pp. International Commission of Agricultural Engineering, U.S.A. (online @ http://www.cigr-ejournal.tamu.edu )
Babatunde, O.O., Olowonibi, M.M. 2000. Experimental Study of Cleaning Dry Crop products Using Forced Air Stream in a Vertical Tunnel. Proceedings of the Nigerian Institution of Agricultural Engineers, 22: 103– 107.
Classen, S.L. 2002. Seed Management on Agricultural Research Farms. IITA Res. Guide 12.
Douglas, J.F, Gascorek, J.M., Swafield, J.A. 1985. Fluid Mechanics. 2nd Ed. ELBS. London 730 P.
Gorial, B.Y., O’callaghan, J.R. 1991. Separation of Particles in a Horizontal Air Stream. Journal of Agricultural Engineering Research (JAER) 49: 273 – 284.
Kashayap, M.M., Pandya, A.C. 1986. Air Velocity Requirement for Winnowing Operations. Journal of Agricultural Engineering Research (JAER) 11(1): 24 - 32.
Koya, O.A., Adekoya, L.O. 1994. Some Physical and Aerodynamics Properties Prevalent in Destoning Some Grain Crops. Ife Journal of technology, 4 (2): 35 – 40.
Lucas, E.B., Olayanju, T.M.A., 2003. Effect of Moisture Content on Some Physical Properties of Two Beniseed (Sesamum indicum L.) Accessions. Journal of Applied Science and Technology, 3(1): 7–12.
Olayanju, T.M.A., Hassan, L.O., Oresanya, M.O. 2003. Mechanical Dehulling of Beniseed – Process and Equipment. Tropical Oilseeds Journal, 8: 72–82.
Oyeku, O.M., Kupoliyi, C.F., Adeyemo, F.S., Oyedoyin, B.O., Oresanya, M.O., Akinoso, R., Olayanju, T.M.A. 2006. Economic Evaluation of Beniseed Oil Production. Journal of Industrial Research and Technology, 1(1): 41–48.
Perry, R.H., Green, D.W., Maloney, J.O. 1985. 6th Ed. Perry,s Chemical Engineer’s Handbook. McGraw-Hill Book Co. New York, 5: 9–12.
UNIFEM, 1988. Cereal Processing Food Cycle and Technology Source Book 3. The United Nations Development Fund for Women.
Wang, Y.S., Chung, D.S., Spillman, C.K., Eckhoff, S.R., Rhee, C., Converse, H.H. 2004. Evaluation of Laboratory Grain Cleaning and Separating Equipment – Part 1. Trans. ASAE, 37(2): 507–513.
