Study of methods for determining the effective coefficient of thermal conductivity using simulation modeling
Students Name: Komiati Denys Vasylovych
Qualification Level: magister
Speciality: System Design
Institute: Institute of Computer Science and Information Technologies
Mode of Study: full
Academic Year: 2022-2023 н.р.
Language of Defence: ukrainian
Abstract: Denys Komiati “Study of methods for determining the effective coefficient of thermal conductivity using simulation modeling”. Master’s qualification thesis. – NU "Lviv Polytechnic", Department of SAP, educational program: 122 "System Design", 2022. The master’s qualification work consists of 93 pages, 6 tables, 6 graphic appendices. In this master’s thesis, a theoretical analysis of data on composite materials, methods of formation of their structures, and an analysis of changes in properties depending on the components from which they are formed were performed. Methods of synthesis of thermal conductivity coefficient of composite materials are also described. Simulation modeling of the determination of the coefficient of thermal conductivity was carried out, which makes it possible to determine this coefficient depending on the percentage composition of the components of the composite. The simulation model makes it possible to avoid expensive field experiments or time-consuming model experiments using special software tools. Actuality of theme. As the analysis of recent publications shows, the study of composite materials and their physical and chemical properties is one of the most urgent problems and has long attracted the attention of scientists. Composite materials are used in various sectors of the economy, which are now widely used in powder metallurgy, shipbuilding, mechanical engineering, atomic electronics, military and defense technology. Composites, in contrast to monomaterials, allow reasonable and purposeful management of their properties. But this is impossible without knowledge of the influence of the shape and concentration of inclusions. Impurities in composites affect the distribution of temperature fields in structures, their strength and, for adequate use, require preliminary theoretical calculation using appropriate mathematical models and methods of modeling physical processes. Therefore, the study of thermal, physical, chemical and other parameters of composites remains an urgent task. The purpose and objectives of the research. The purpose of the master’s thesis is to detail the methods of calculating the thermophysical properties of composite materials, which, when the concentration of impurities changes, can change their properties from a heat insulator to a heat conductor, which can be used in the manufacture of radiators in microelectronic devices. The following tasks were solved in the work: 1. Designs, composition and methods of manufacturing composite materials are considered. 2. Methods of calculating various properties of composite materials are analyzed: plastic, thermophysical, elastic. 3. The patterns of changes in thermal characteristics depending on changes in the concentration of impurities were studied. 4. A simulation model for calculating the effective thermal conductivity coefficient was built. A simulation of the change in the thermal conductivity coefficient for an aluminum matrix with graphene fibers was carried out. The scientific novelty of the work is that: The methods that determine the effective coefficient of thermal conductivity using simulation modeling have been improved, which made it possible to avoid expensive field studies or costs associated with conducting model experiments using licensed software. Practical value. The obtained results using the developed simulation model make it possible to form the input data of a composite material that will be used as an insulator or heat conductor in microelectronic systems.