Aerodynamic properties of lentil seeds

Abstract

A b s t r a c t. Aerodynamic properties of solid materials have long been used to convey and separate seeds and grains during post-harvest operations. The objective of this study was evaluation of the aerodynamic properties of green and red lentil seeds as a function of moisture content from 10 to 25% (w.b.). The results showed that as the moisture content increased from 10 to 25%, the terminal velocity of seeds increased, following a linear relationship, from 6.90 to 9.14 and from 6.37 to 7.67 m s -1 for green and red lentil seeds, respectively. Seeds of the green variety had terminal velocities with a mean value of 7.89 m s -1 , while the red variety had a mean value of 7.02 m s -1 , for moisture content from 10 to 25%. The Reynolds number increased linearly from 2 310.90 to 3 269.23 and from 1 215.02 to 1 535.09 for green and red lentil seeds, respectively, with the increase of seeds moisture content from 10 to 25%. While, drag coefficient decreased from 0.69 to 0.40 and from 0.84 to 0.69 for green and red lentil seeds, respectively, with the increase of moisture content. Mathematical relationships were developed to relate the change in seeds moisture content with the values of aerodynamic properties obtained. The analysis of variance showed that the effect of moisture content on all aerodynamic properties of lentil beans was significant at the 1% probability level.

Fuzzy Knowledge-Based Model for Prediction of the Terminal Velocities of the Chickpea and Dry Bean Seeds

“…Kural (1995) reported that variation in physical properties of seeds such as mass, sphericity index and projected area, influenced terminal velocity significantly. The similar results was also found among seeds: lentil by Shahbazi et al, (2015), millets by Baryeh (2002), pistachio by Kashaninejad et al, (2006).…”

“…Approximately, a mass increase of 58 % at chickpea seed and of 87 % at dry bean seed caused a 15 % and 24 % increase of terminal velocity, respectively. Shahbazi et al, (2015) found that the terminal velocity occurred an increase of 32% with increasing projection area from 32.94 to 37.22 mm 2 for lentil seeds. Soylu et.…”

Assessment of physical and aerodynamic properties of corn kernel (KSC 704)

“…Thus, the polynomial model was picked out as an appropriate model to predict the drag coefficient of maize kernels as a function of moisture content. Similar results were obtained byShahbazi et al (2015) andNalbandi et al (2010). But a linear equation between moisture content and terminal velocity was observed byGupta et al (2007) in sunflower seed andMatouk et al (2008) in canola seed.…”

“…Furthermore, numerous studies have been conducted on the aerodynamic properties of agricultural products. Shahbazi, Valizadeh, Dowlatshah, and Hassanzadeh (2015) investigated the aerodynamic properties of mung bean seeds as a function of seed moisture content. In this study, seeds were split into two groups in their lengths, that is, Group A (less than 4.8 mm) and Group B (more than 4.8 mm).…”

“…According to the results, with an increase in the moisture content, the terminal velocities of green and red seed are increased from 6.90 m/s to 9.14 m/s and 6.31 m/s to 7.67 m/s, respectively. The Reynolds number is also increased from 2,310.90 to 3,269.23 and 1,215.02 to 1,535.09, respectively, with a linear relationship, but the drag coefficient of green and red seeds is decreased into a polynomial relationship from 0.69 to 0.40 and 0.84 to 0.69, respectively (Shahbazi et al, 2015). Additional studies have been carried out to measure the aerodynamic properties of various varieties of agricultural products to use these properties in the process of transfer, separation, and grading (Afonso Júnior, Corrêa, Pinto, & Queiroz, 2007; Aydin, 2003; Matouk, Abd El‐latif, & Tharwat, 2008; Matouk, El‐Kholy, Hamam, & Ewis, 2005; Nalbandi, Seiiedlou, & Ghassemzadeh, 2010; Nimkar, Mandwe, & Dudhe, 2005).…”