Aerodynamic Properties of Some Oilseeds Crops Under Different Moisture Conditions

ElGamal, Ramadan; Radwan, S. S.; El-Amir, M; ElMasry, Gamal

doi:10.21608/jssae.2011.55480

Cited by 4 publications

(7 citation statements)

References 20 publications

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“…Therefore, an increase in Reynolds number with increasing the size and kernel moisture content seems logical. El‐Gamal, Radwan, ElAmir, and El‐Masry (2011) investigated the effect of kernel moisture content on some aerodynamic properties of three oilseeds such as peanut, soybean, and cotton.…”

Section: Resultsmentioning

confidence: 99%

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

Chenarbon

Movahhed

2021

J Food Process Engineering

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Physical and aerodynamic properties of agricultural products have been used to precision design of the machinery and different postharvest operations. In this study, some physical and aerodynamic properties of corn kernels were investigated as a function of size at three levels of small, medium, and large (8.41 mm, 9.60 mm, and 11.62 mm, respectively) and moisture content in the range of 10 to 25% (wet basis). According to results, with increasing the moisture content from 10 to 25%, the length; width; thickness; geometric mean diameter; mass; and volume of the small, medium, and large kernels linearly increased by 2.

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Section: Resultsmentioning

confidence: 99%

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

Chenarbon

Movahhed

2021

J Food Process Engineering

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“…The importance of taking into consideration the aerodynamic factor in the processing of seed material is indicated in [2]. However, numerical metrics for measuring these pro perties were not formulated.…”

Section: Literature Review and Problem Statementmentioning

confidence: 99%

“…Only the influence of design parameters and modes of operation of vibratory machines is investigated. The possibility of eliminating the harmful effects of the aerodynamic factor by using the screen has not been considered [1][2][3];…”

Section: Literature Review and Problem Statementmentioning

confidence: 99%

Construction of a regression model for assessing the efficiency of separation of lightweight seeds on vibratory machines involving measures to reduce the harmful influence of the aerodynamic factor

Nykyforov¹,

Antoshchenkov²,

Halych³

et al. 2022

EEJET

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When separating (cleaning) lightweight seed mixtures with the help of vibratory machines, there is an issue related to the harmful effect of air movement in the gaps between parallel working surfaces of vibratory machine units. This factor is particularly harmful to seed material, which is sensitive to air movement (some medicinal and vegetable crops). To address this issue, the design of vibratory machines is changed while their operational regimes are configured accordingly. This requires many full-scale experiments and (or) time-consuming personal computer-based simulation of the working processes of the vibrational motion of such seed mixtures. This paper proposes several regression models that make it possible to replace time-consuming numerical modeling with simple analytical expressions (regression equations). These equations are used for a quantitative assessment of the degree of influence of aerodynamics on the kinematic parameters of the vibrational motion of particles of seed mixtures. The assessment is derived depending on the geometric characteristics of the aerodynamic screen, the design of the unit, and the amplitude of oscillations of the working surfaces of a vibratory machine. The models take the form of equations of multiple linear regression of the second order, obtained on the basis of a series of numerical experiments. The processes of vibration movement of the seed material of parsnips, lettuce, and fragrant dill were investigated. The coefficient of determination equaled 0.956...0.967. The results reported here are useful for the construction of algorithms to optimize the design and adjust the operating modes of vibratory separators according to the criterion of minimizing the harmful effects of the aerodynamic factor

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“…The importance of taking into account the aerodynamic factor in seed processing was indicated in [2]. However, no nume rical metrics have been formulated to measure these properties.…”

Section: Literature Review and Problem Statementmentioning

confidence: 99%

“…The currently applied mathematical models of such seed movement take into account only action of dynamic resistance during the period of seed movement out of contact with the work surface (when the seeds rebound). The action of the aerodynamic factor is taken into account through the value of drift (transfer) of seeds by air relative to their rebound point [2].…”

Section: Introductionmentioning

confidence: 99%

Development of a mathematical model of vibratory non-lift movement of light seeds taking into account the aerodynamic forces and moments

Nikiforov

Nykyforova

Antoshchenkov

et al. 2021

EEJET

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The modern practice of using vibratory machines when working with fine-size light-weight seeds is faced with such an undesirable phenomenon as the impact of aerodynamic forces and moments on the kinematics of vibrational movement of particles of the seed mixture fractions. According to the results of scientific studies devoted to the solution of this problem, only mathematical models of vibrational movement are used, where the aerodynamic factor is taken into account as taking the seeds by airflow. This is typical only for cleaning modes with the rebound of seeds from the vibrating surface. Aerodynamic forces and moments are present in them only as a force of aerodynamic resistance. The action of lateral aerodynamic forces and their moments are not taken into account. Their consideration allows to extend the range of action of the aerodynamic factor on the modes of vibration cleaning (vibroseparation) without rebound (but with sliding and rolling) which are of greater interest in terms of improving the efficiency of processing fine-size seeds. A mathematical model of seed vibration movement taking into account the action of a complete set of aerodynamic forces (dynamic resistance forces and lateral aerodynamic forces) and moments was proposed. This makes it possible to simulate non-lifting modes of vibrational movement of seeds. A system of algebraic equations that are linear with respect to the kinematic parameters of seed movement which was obtained by translating differential equations of movement into a finite-difference form was presented. The possibility of numerical solution of equations of movement by the Euler method was shown. The results of the evaluation of the model adequacy for the processes of vibration separation of tobacco seeds and false flax were presented. As shown by the results of calculations and experiments, the developed model provides an increase in the adequacy of the simulation results by 30 % in comparison with the model where the aerodynamic factor is not taken into account

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Aerodynamic Properties of Some Oilseeds Crops Under Different Moisture Conditions

Cited by 4 publications

References 20 publications

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

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

Construction of a regression model for assessing the efficiency of separation of lightweight seeds on vibratory machines involving measures to reduce the harmful influence of the aerodynamic factor

Development of a mathematical model of vibratory non-lift movement of light seeds taking into account the aerodynamic forces and moments

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