Dynamic Friction Coefficient Measurement of Granular Fertiliser Particles
| العنوان: | Dynamic Friction Coefficient Measurement of Granular Fertiliser Particles |
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| المؤلفون: | Tony E. Grift, Jan Willem Hofstee, Emmanuel Piron, G. Kweon, Sylvain Villette |
| المساهمون: | UNIVERSITY OF ILLINOIS URBANA USA, Partenaires IRSTEA, Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA), Wageningen University and Research [Wageningen] (WUR), Technologies et systèmes d'information pour les agrosystèmes (UR TSCF), Centre national du machinisme agricole, du génie rural, des eaux et forêts (CEMAGREF), Etablissement National d'Enseignement Supérieur Agronomique de Dijon (ENESAD) |
| المصدر: | Biosystems Engineering 95 (2006) 4 Biosystems Engineering Biosystems Engineering, Elsevier, 2006, 95 (4), pp.507-515. ⟨10.1016/j.biosystemseng.2006.08.006⟩ Biosystems Engineering, 95(4), 507-515 |
| بيانات النشر: | Elsevier BV, 2006. |
| سنة النشر: | 2006 |
| مصطلحات موضوعية: | simulation-model, Soil Science, Angular velocity, 01 natural sciences, Standard deviation, Dynamical friction, Particle velocity, Spinning, tool spat, Chemistry, Drop (liquid), 010401 analytical chemistry, 04 agricultural and veterinary sciences, Aerodynamics, Mechanics, spread pattern-analysis, Onderwijsinstituut, 0104 chemical sciences, Radial velocity, Classical mechanics, Control and Systems Engineering, [SDE]Environmental Sciences, 040103 agronomy & agriculture, 0401 agriculture, forestry, and fisheries, Astrophysics::Earth and Planetary Astrophysics, examples, spinning disc spreader, Agronomy and Crop Science, Food Science |
| الوصف: | International audience; Theoretically, in the absence of friction, when a particle is sliding along a straight radial vane, mounted on a flat disc which is spinning at a constant rotational velocity, its radial and tangential velocity are equal at any point along the vane. In reality, there are disturbances causing a difference between the radial and tangential velocities, such as drop mechanics, mechanical (Coulomb) friction, aerodynamic effects, as well as particle bouncing effects against the vane and other particles. These factors were lumped together and termed the friction coefficient'. The tangential particle velocity at the discharge point was assumed constant, since the particle was assumed in direct contact with the vane until emanation. The radial particle velocity was measured at a distance of 04m from the disc edge with an optical sensor developed in earlier research. A theoretical analysis was used to obtain equations that allowed determination of the mechanical friction coefficient of individual particles, based on the measured radial velocity and the assumed constant tangential velocity. For experiments, a commercial single disc spreader fitted with a flat disc and straight radial vanes was used. The results for urea fertiliser showed a near-Gaussian distribution of the friction coefficients, with a mean value of 036 and a standard deviation of 01 among 812 measurements. In addition, an inversely proportional relationship was found between the friction coefficients and the particle diameters. |
| وصف الملف: | application/pdf; application/octet-stream |
| تدمد: | 1537-5110 1537-5129 |
| DOI: | 10.1016/j.biosystemseng.2006.08.006 |
| DOI: | 10.1016/j.biosystemseng.2006.08.006⟩ |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_dedup___::2693ae51de049a029bb1caf0fc3ce0f5 https://doi.org/10.1016/j.biosystemseng.2006.08.006 |
| Rights: | RESTRICTED |
| رقم الانضمام: | edsair.doi.dedup.....2693ae51de049a029bb1caf0fc3ce0f5 |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 15375110 15375129 |
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| DOI: | 10.1016/j.biosystemseng.2006.08.006 |