Study of physical properties and different mode of  motion of three  type of seeds in rotating drum for seed coating

doi:10.22092/erams.2017.113000

Document Type : Original Article

https://doi.org/10.22092/erams.2017.113000

Abstract

The optimal use of rotary seed coater needs the knowledge of the physical properties and the behavior of seed motion in rotary drum. One of the most important parameter in these equipments is the rotational speed of the drum which seeds have rolling mode. In this research a new method was used for measuring these properties that was based on the motion of seeds in a less than 50% filled rotating drum. Firstly the angle of repose of three types of seed (vetch, wheat and tomato seed) with different shape was measured with different methods and the values obtained were compared. Then, the lower and upper angle of repose were also measured by rotary drum. At the final step, the rotational speed of the drum were gradually increased from 0 to 100 rpm and the speed of the drum which the seed rolling mode of motion began and ended was measured. The results showed that the shape of the seeds has a great impact on the type of their motion in the rotating drum and it was obtained that the vetch seeds had the widest speed range with rolling mode of motion (from 1 to 65 rpm). However, this range for tomato seeds is from 8 to 40 rpm and for wheat seeds from 6 to 49 rpm. The increase of filling degree from 25% to 40%, the rolling mode of motion for all of seeds began and ended sooner.

Keywords

References

Burkalow, A. 1945. Angle of repose and angle of sliding friction: an experimental study. Bull. Geol. Soc. Am. 56, 6-7.

Fraczek, J., Zlobecki, A., and Zemanek, J. 2007. Assessment of angle of repose of granular plant material using computer image analysis. Food Eng. 83,17-22.

Henein, H. 1980. Bed behavior in rotary cylinders with applications to rotary kilns. Ph. D Dissertation, University of British ariety. Vancouver.

Jain, R.K., Bal, S. 1997. Properties of pearl millet. J. Agric. Eng. Res. 66, 85-91.

Karababa, E. 2006. Physical properties of popcorn kernels. J. Food Eng. 72, 100-107.

Khazaei, J. and Ganbari, S. 2010. New method for simultaneously measuring the angles of repose and frictional properties of wheat grains. Int. Agroph. 24, 275‐286.

Kingsly, A.R.P., Singh, D.B., Manikatan, M.R., and Jain, R.K. 2006. Moisture dependent physical properties of dried arietyate seeds. J. Food Eng. 75, 492-496.

Koocheki, A., Razavi, S.M.A., Milani, E., Moghadam, T.M., Abedini, M., Alamatiyan, S., and Izadkhah, S. 2007. Physical properties of watermelon seed as a function of moisture content and ariety. Int. Agroph. 21, 349-359.

Lee, J. and Herrmann, H.J. 1993. Angle of repose and angle of marginal stability: molecular dynamics of granular particales. J. Physics. 26, 373.

Liu, X.Y. 2005. Impact of cohesion forces on particle mixing and segregation. Ph.D Dissertation. University of Pittsburgh. PA. USA.

Liu, X.Y., Specht, E. and Mellmann, J. 2005a. Experimental study of the lower and upper angles of repose of granular materials in rotating drums. Powder Technol. 154, 125-131.

Liu, X.Y., Specht, E. and Mellmann, J. 2005b. Slumping-rolling transition of granular solids in rotary kilns. Chem. Eng. Scientist. 60, 3629-3636.

McGinity, J. W. and Felton, L.A. 2008. Aqueous polymeric coatings for pharmaceutical dosage forms. Third Edition. 67-75.

Mellmann, J. 2001. The transverse motion of solids in rotating cylinders forms of motion and transition behavior. Powder Technol. 118, 251-270.

Mohsenin, N.N. 1986. Physical Properties of Plant and Animal Materials. Gordon and Breach. Amsterdam.

Pandy, P., Turton, R., Joshi, N., Hammerman, E. and Ergan, J. 2006. Scaleup of a pan coating process. AAPS pharmscitech. 7(4). Article 102.

Sessiz, A. Esgici, R., and Kizil, S. 2006. Moisture-dependent physical properties of caper fruit. J. Food Eng. 75, 492-496.

Singh, K.K. and Goswami, T.K. 1996. Physical properties of cumin seed. J. Agric. Eng. Res. 64, 93-98.

Vanangamudi, K. and Natrajan, K. 2006. Advances in Seed Science and Technology. 123-131.

Zhou, Y.C., Wright, B.D., Yang, R.Y., Xu, B.H. and Yu, A.B. 1999. Rolling friction in the dynamic simulation of sandpile formation. J. Physica. 269, 536-553.

Agricultural Mechanization and Systems Research

Study of physical properties and different mode of motion of three type of seeds in rotating drum for seed coating

References

References

Volume 17, Issue 67
March 2017
Pages 55-68

Study of physical properties and different mode of motion of three type of seeds in rotating drum for seed coating

References

References

Volume 17, Issue 67March 2017Pages 55-68

Volume 17, Issue 67
March 2017
Pages 55-68