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 the journal
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
The journal is devoted to highlighting current issues in engineering, mechanical engineering, and technological processes, including the study of dynamic and oscillatory phenomena in technical systems, the application of mathematical methods for process modeling and analysis, as well as the presentation of results of design-engineering and technological developments. Particular attention is given to the study of vibration processes and their application in modern technologies.
The purpose of the scientific journal “Vibrations in Engineering and Technologies” is to disseminate the results of fundamental and applied research in the field of engineering sciences aimed at developing theoretical foundations and practical approaches to the design, analysis, and improvement of machines, materials, and technological processes, including the use of vibration and oscillatory effects in various sectors of production.
The publication is focused on the formation of a modern scientific and informational environment for the effective exchange of research results, support of innovative development, and implementation of advanced technical solutions in industry, agro-industrial production, and related fields.
The journal promotes the development of interdisciplinary research, the integration of modern engineering approaches, and the enhancement of the efficiency of technological processes and technical systems, including through the rational use of vibration phenomena.
Objectives of the Scientific Journal
To achieve its stated purpose, the journal addresses the following key objectives:
dissemination of results of fundamental and applied scientific research in the fields of mechanics, mechanical engineering, technological processes, machine dynamics, and equipment, as well as in areas related to the application of vibration phenomena in engineering and technologies;
promotion of research aimed at the creation and improvement of machines, mechanisms, and technological equipment based on oscillatory and vibration processes;
support for the implementation of modern technological solutions focused on improving productivity, energy efficiency, and reliability of technical systems;
обеспечение scientific exchange of research results among research institutions, higher education establishments, and industrial enterprises;
development of interdisciplinary cooperation among researchers in the fields of mechanics, materials science, material processing technologies, and automation of technological processes;
dissemination of modern scientific achievements and advanced technologies related to the application of vibration processes in production and technical systems.
Publisher Vinnytsia National Agrarian University
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 119 issues wherestudy of vibration effects, the creation of progressive energy saving technologies and equipment for their implementation were highlighted.
Currently Ihor Kupchuk, Candidate of Technical Sciences, Associate professor, Associate Professor of the Department of Engineering Mechanics and Technological Processes in the Agricultural Industry Faculty of Engineering and Technology Vinnytsia National Agrarian University 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.
