Issue №: 2(117)
The journal deals with the problems of vibration technologies and machines, mathematical methods of vibration process studies, information on design and technological development, presents teaching and methodological aspects of teaching in the Higher School of Applied Sciences, where vibration machines and technologies are studied.
COMPARATIVE ANALYSIS OF THE RESULTS OF EXPERIMENTAL STUDIES AND NUMERICAL MODELING OF THE CONVECTIVE DRYING PROCESS OF WALNUTS
Yaropud Vitalii – Doctor of Technical Sciences, Associate Professor, Dean of the Engineering and Technology Faculty, Vinnytsia National Agrarian University (3 Soniachna St., Vinnytsia, Ukraine, 21008, e-mail: yaropud77@gmail.com, ORCID 0000-0003-0502-1356.
Lavreniuk Petro – Candidate for the degree of Doctor of Philosophy in specialty 133 Industrial Mechanical Engineering in Industrial Mechanical Engineering of the Department of «Machinery and Equipment for Agricultural Production» of Vinnytsia National Agrarian University (3 Sonyachna St., Vinnytsia, 21008, Ukraine, e-mail: lavreniuk.petro.1239@gmail.com, ORCID 0000-0002-2480-7365).
In the current conditions of agro-industrial complex development, increasing the efficiency of post-harvest processing, particularly the drying of walnuts, is of great importance. The quality of the final product and the energy efficiency of the process largely depend on the uniformity of moisture removal and the stability of the temperature regime during drying. One of the promising directions for improving drying units is the use of numerical modeling methods to predict process parameters and optimize dryer design. The combination of experimental research with mathematical analysis makes it possible to evaluate in detail the distribution of temperature, humidity, and air velocity fields within the working chamber, thus ensuring a more accurate selection of the equipment’s operating modes.
In this study, CFD-DEM modeling was applied to provide a three-dimensional description of the dynamics of the air flow and the movement of walnut particles, enabling the assessment of local velocity, temperature, and humidity fields, as well as the intensity of heat and mass transfer between phases. A full factorial experiment was carried out with three main drying parameters: screw rotation speed, screen inclination angle, and bunker filling height. The efficiency of the process was evaluated using the criteria of average moisture content and uniformity of moisture distribution within the bunker volume.
The results of numerical modeling were experimentally verified on the SGK-4 «TIRAS» dryer, which demonstrated a high level of correspondence between theoretical and experimental dependencies of the time required to achieve maximum mixing efficiency (correlation coefficient 0.79). The obtained results confirm the reliability of the developed mathematical model and its applicability for further optimization of the dryer’s operating parameters, improving drying efficiency, and enhancing the quality of the final product.
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About journal
The journal "Vibrations in engineering and technology" presents materials on the following issues
• Theory of processes and machines
• Mechanical Engineering and materialprocessing
• Processing and food production
The journal "Vibrations in Engineering and Technologies" is included in the list of technical scientific publications of Ukraine
(Category "B", Order of the Ministry of Education and Science of Ukraine dated July 2, 2020 No. 886)
Old version of the site: http://vibrojournal.vsau.edu.ua/
The journal "Vibrations in Engineering and Technology" is indexed by the following databases and catalogs:
The certificateof massmedia State registration:kv no 16643-5115 from 30.04.2010 .
Founder of the journal: Vinnytsia National Agrarian University
Kind of publication: journal
Type of publication : Scientific
Publication status: Domestic
Year of founding:
Periodicity: 4 times a year
Extent: 18.75 nominal printed pages
ISSN: 2306-8744 (printed version), (online)
Language of edition : (mixed languages) Ukrainian, English
The scope of the distribution and the category of readers: national, foreign, teaching staff, scientists, businessmen.
Periodical is included in the list of scientific professional editions of Ukraine approved by the Order of Ministry of Education and Sciences of Ukraine from 21.12.2015 No. 1328.
The journal "Vibrations in engineering and technology" is included in the "Catalogue of periodicals of Ukraine".
Journal subscription can be executed in each post office department.
Subscription Index is 99720.
Old version of site: http://vibrojournal.vsau.edu.ua/
In June 1994 the 2nd International Scientific and Technical Conference "Application of vibrations for technological purposes" was organized on the basis of Vinnytsia State Agricultural Institute. Leading experts in this field, noting the significant contribution to the school of Vibration Engineering under the leadership of P. S. Bernyk, proposed to create a professional all-Ukrainian scientific and technical journal "Vibration in engineering and technology..The journal was foundedat Vinnytsia State Agricultural Institute and P.S. Bernyk was elected to be the chief editor .
For all these years (since 1994) theJournal "vibration in engineering and technology" published 94 issues wherestudy of vibration effects, the creation of progressive energy saving technologies and equipment for their implementation were highlighted.
Currently Kaletnik H.M PhD , professor, academician NAAS is the chief editor of the "Vibrations in engineering and Technology"
The journal "Vibration in Engineering and technology", which has no analogues on the territory of Ukraine, is well known abroad.
