Mathematical planning of a multi-factor experiment and optimization of the feed extrusion process

Kizatova, Marzhan; Sultanova, Madina; Borovsky, Alexander Y.; Muslimov, Nurzhan Zh.; Nokusheva, Zhibek; Aitzhanov, Yevgeny S.

doi:10.1088/1757-899x/994/1/012022

Cited by 2 publications

(2 citation statements)

References 10 publications

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“…In particular, on the basis of a single-screw extruder, three forming channels of the matrix were designed to select the most optimal geometric parameters of the die (Fig. [4][5][6][7][8][9][10][11][12], which affect the depth of physico-chemical transformations occurring in the structure of the combined feeds. When processing the data obtained, graphical dependences of velocity and pressure changes along the length of the cone-ring channel were constructed for various groups of combined feeds with different densities with different angular speeds of screw rotation (Fig.…”

Section: Discussion Of the Results Of Mathematical Modeling And Optim...mentioning

confidence: 99%

“…In [9,10], the effectiveness of the extrusion process on the quality indicators of combined feed with the extruded waste of oilseeds containing a sufficient amount of protein and raw fat, which can be used in animal feeding diets to increase milk productivity, was investigated. Using mathematical methods of planning a multifactorial experiment, a mathematical model of the process of extrusion of feed raw materials has been developed.…”

Section: Literature Review and Problem Statementmentioning

confidence: 99%

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Mathematical modeling of the melt flow in the cone-ring channel of the extruder matrix

Ospanov,

Timurbekova,

Zhalelov

2024

EEJET

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The peculiarity of the work is to develop a mathematical model of the melt flow in the cone-annular channel of the extruder die, which will allow you to choose the optimal geometric shape of the annular channel, as well as the angular rotation speed of the extruder screw. The object of the study is the cone-ring channel of the extruder matrix. To solve the three-dimensional problem of turbulent and laminar unsteady motion, the FlowVision software package was used, which allows solving partial differential equations using the finite volume method. The correct choice of the geometric shape of the annular gap made it possible to change the molecular structure of the product by creating a maximum pressure value. The optimally selected angular rotation speed of the extruder screw made it possible to carry out deep melting of the product due to the conversion of the mechanical energy of the screw into thermal energy. In the process of designing the forming of the cone-ring channel, the three volumes of the changing geometry of the stamp were selected, at the borders of the transition of which extreme points were observed. Deviations between the analyzed and experimental values of velocity and pressure were found in the limits of 9–12 % and 17–22 %, respectively. Based on the analysis of the obtained results of modeling, the optimal geometric shape of the annular gap and the recommended angular rotation speed of the extruder screw were revealed. The mathematical model proposed formed the basis of the developed design of the six-zone extruder. In the extruder, the geometric characteristics of the screw (variable pitch of the turns) were substantiated and selected, which provide the maximum effect of dissipation, i.e. autogenous mode of operation

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