Галина Буланчук - Academia.edu (original) (raw)
Галина Буланчук
Uploads
Papers by Галина Буланчук
Processing of the vector velocity field and its visualization is an integral part of many numeric... more Processing of the vector velocity field and its visualization is an integral part of many numerical simulations. Presentation of the results in the traditional form is performed by means of arrow diagrams of the velocity field or color diagrams of the velocity module. But such informationdoes not give a complete picture of the flow as a whole. This paper proposes a visualization technique for streamlines that based on some ideas of texture visualization with using particle advection at a given velocity field. The technique was used for simulation of the ideal fluid flow of a buildings system in two-dimensional case. The algorithm is that at each node of the non-uniform mesh are placed particles moving along the velocity field. A start and end position of a particle is connected by a segment that is color-coded depending on the velocity module. The movement of such particles through space through a certain number of steps will leave a trace in the form of flow lines. We created a co...
Буланчук Г. Г. Чисельне моделювання пружних хвиль в трубі змінного перерізу / Г. Г. Буланчук, О. ... more Буланчук Г. Г. Чисельне моделювання пружних хвиль в трубі змінного перерізу / Г. Г. Буланчук, О. М. Буланчук // Университетская наука-2015 : в 4-х т. : тез. докл. междунар. науч.-техн. конф. (Мариуполь, 19-20 мая 2015 г.) / ГВУЗ «ПГТУ». – Мариуполь, 2015. – Т. 2. – С. 256
Наука та виробництво, 2020
Improving the efficiency of the work of metallurgical enterprises in terms of providing consumer ... more Improving the efficiency of the work of metallurgical enterprises in terms of providing consumer requirements for the indicators of physical and mechanical properties of steel rolling and reducing metal content of constructions, obtained from it, is currently an urgent scientific and technical task. Its solution in the conditions of rolling production of ukrainian enterprises is possible due to the processing and analysis of experimental data on technological modes of rolling using Big Data technology, that will improve the quality of finished metal products and their competitiveness in the market. It is determined that the main problem while working with the received big data is lack of a single approved spreadsheet form in MS Excel for further statistics, as well as manual processing mode, which significantly complicates further data analysis, the rapid development of rolling technology and in some cases reduces the effectiveness of technological decisions. A unified database of factual data has been created, an algorithm for its sequential reading and verification has been developed, as well as software that in an automated mode allows organizing, analyzing and summarizing the available amount of experimental data that corresponds to real rolling conditions, it is possible to filter out invalid data first and prevent duplicate rows when importing. The regression coefficients for mathematical models that predict values of strength limit, yield limit and relative elongation of plate iron material are determined. The variance between the experimental and calculated values of the mechanical properties of thick sheets is estimated. It is concluded that the introduction of software at the enterprise allows to reduce time for processing and completing customer requests, as well as reducing the number of testing rollings and heat treatment to correct the mechanical properties of the rolling.
Наука та виробництво, 2020
Processing of the vector velocity field and its visualization is an integral part of many numeric... more Processing of the vector velocity field and its visualization is an integral part of many numerical simulations. Presentation of the results in the traditional form is performed by means of arrow diagrams of the velocity field or color diagrams of the velocity module. But such informationdoes not give a complete picture of the flow as a whole. This paper proposes a visualization technique for streamlines that based on some ideas of texture visualization with using particle advection at a given velocity field. The technique was used for simulation of the ideal fluid flow of a buildings system in two-dimensional case. The algorithm is that at each node of the non-uniform mesh are placed particles moving along the velocity field. A start and end position of a particle is connected by a segment that is color-coded depending on the velocity module. The movement of such particles through space through a certain number of steps will leave a trace in the form of flow lines. We created a co...
Буланчук Г. Г. Чисельне моделювання пружних хвиль в трубі змінного перерізу / Г. Г. Буланчук, О. ... more Буланчук Г. Г. Чисельне моделювання пружних хвиль в трубі змінного перерізу / Г. Г. Буланчук, О. М. Буланчук // Университетская наука-2015 : в 4-х т. : тез. докл. междунар. науч.-техн. конф. (Мариуполь, 19-20 мая 2015 г.) / ГВУЗ «ПГТУ». – Мариуполь, 2015. – Т. 2. – С. 256
Наука та виробництво, 2020
Improving the efficiency of the work of metallurgical enterprises in terms of providing consumer ... more Improving the efficiency of the work of metallurgical enterprises in terms of providing consumer requirements for the indicators of physical and mechanical properties of steel rolling and reducing metal content of constructions, obtained from it, is currently an urgent scientific and technical task. Its solution in the conditions of rolling production of ukrainian enterprises is possible due to the processing and analysis of experimental data on technological modes of rolling using Big Data technology, that will improve the quality of finished metal products and their competitiveness in the market. It is determined that the main problem while working with the received big data is lack of a single approved spreadsheet form in MS Excel for further statistics, as well as manual processing mode, which significantly complicates further data analysis, the rapid development of rolling technology and in some cases reduces the effectiveness of technological decisions. A unified database of factual data has been created, an algorithm for its sequential reading and verification has been developed, as well as software that in an automated mode allows organizing, analyzing and summarizing the available amount of experimental data that corresponds to real rolling conditions, it is possible to filter out invalid data first and prevent duplicate rows when importing. The regression coefficients for mathematical models that predict values of strength limit, yield limit and relative elongation of plate iron material are determined. The variance between the experimental and calculated values of the mechanical properties of thick sheets is estimated. It is concluded that the introduction of software at the enterprise allows to reduce time for processing and completing customer requests, as well as reducing the number of testing rollings and heat treatment to correct the mechanical properties of the rolling.
Наука та виробництво, 2020