EFFECT OF VARIETY AND MOISTURE CONTENT ON AERODYNAMIC PROPERTIES OF FOUR NIGERIAN COWPEA (Vigna unguiculata) VARIETIES
DOI:
https://doi.org/10.51406/jnset.v10i1.1348Keywords:
Cowpea (Vigna unguiculata), aerodynamic properties, terminal velocity, drag coefficient, moisture content, varieties, NigeriaAbstract
Knowledge of aerodynamic properties of a crop is important in developing handling, cleaning and processing equipment for the crop. Terminal velocity, drag coefficient and Reynolds number of four Nigerian cowpea varieties namely Ife 98-12, IT90K-277-2, Ife Brown and Drum were studied at moisture levels of 8.2, 12.2, 14.2 and 18.2% wet basis (w.b.), which are levels useful in the design of processing and handling equipment. The terminal velocities of the four varieties ranged from 13.35 to 14.47 m/s, the drag coefficient ranged from 0.446 to 0.454 and Reynolds number ranged from 4768 to 6447. The results showed that both variety moisture content and have significant effect (P≤ 0.05) on both terminal velocity and Reynolds number.
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Akinoso R, Igbeka J.C., Olayanju T.M.A. 2006. Process optimization of oil expression from sesame seed (Sesamum indicum Linn.). CIGR Ejournal FP 06 011(VIII)
Aydin C., Ozcan M. 2002. Some physico-mechanical properties of terebinth fruits. Journal of Food Engineering, 53: 97-101
Bressani R. 1985. Nutritive value of cowpea. In: cowpea; research, production and utilization: S.R. Singh and K.O. Rachie eds. John Wiley and Sons, New York. pp 353-360
Carman K. 1996. Some physical properties of lentil seeds. Journal of Agricultural Engineering Research, 63: 87-92
Coulibay O., Lowenberg-DeBoer J. 2003. The economics of cowpea in West Africa. www.iita.org/details/cowpea. Accessed on 13-06-06
Gorial B.Y., O’Callaghan J.R. 1990. Aerodynamic properties of grain/straw materials. Journal of Agricultural Engineering Research, 46(4): 275-167
FAOSTAT. 2005. www.fao.org/statistics. Accessed on 12-02-07
Irtwange S.V., Igbeka J.C. 2003. Effect of moisture content on aerodynamic properties of African yam bean (Sphenostylis stenocarpa). Applied Engineering in Agriculture, 19(3 ): 321 – 328
Joshi D.C., Das, S.K., Mukherjee R.K. 1993. Physical properties of pumpkin seeds. Journal of Agricultural Engineering Research, 54: 219-229
Khoshtaghaza M.H., Mehdizadeh R.M. 2006. Aerodynamic properties of wheat kernel and straw materials. Agricultural Engineering International: The CIGR Ejournal., Vol. VIII.
Lambot C. 2003. Industrial potential of cowpea. www.iita.org/details/cowpea. Accessed on 13-06-06.
Moshenin N.N. 1986. Physical properties of plant and animal materials. Revised Edition. Gordon and Breach Science Publishers. New York, pp51-70.
Olayanju T.M.A., Akinoso R., Aderinlewo A.A., Dairo O.U., Ola I. A. 2009. Moisture dependence of some aerodynamics properties of beniseed. ASSET-An International Journal, Series B, 8(1):68-76
Polat R., Atay, U. Saglam C. 2006. Some physical and aerodynamic properties of soybean. Journal of Agronomy, 5(1): 74-78
Rajabipour A., Tabatabaeefar A., Farahani M. 2006. Effect of moisture on terminal velocities of wheat varieties. International Journal of Agriculture and Biology, 8(1): 10-13
Razavi S.M.A., Rafi A., Akbari R. 2007. Terminal velocity of pistachio nut and kernel as affected by moisture content and variety. African Journal of Agricultural Research, 2(12): 663-666
Singh B.B. 2003. Breeding cowpea varieties for resistance to Striga gesnerioides and Alectra vogelii. www.iita.org/details/cowpea. Accessed on 13-06-06
Taiwo K.A. 1998. The potential of cowpea as human food in Nigeria. Technovation, 18(7): 467-481
Tunde-Akintude T.Y., Akintunde B.O. 2007. Effect of moisture content and variety on selected properties of beniseed. Agricultural Engineering International: the CIGR Ejournal. Manuscript FP 07 021. Vol. IX. November, 2007
