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Original scientific paper https://doi.org/10.2298/TSCI180919327Y Many industrial products work under different constraints. Examples of these products include transformers and keeping them in certain operating temperatures is an important design constraint. However, since power transformers have different requirements, there are no standard products. For this reason, it is difficult and costly to test each one by considering these constraints and to design them accordingly. Satisfactory thermal analysis using a 3-D finite volume-based CFD model is an important step to understand natural convection and necessary design modifications under the desired conditions. The aim of this study is to verify the performance and reliability of the design by comparing the experimental results with 3-D finite volume analysis results by considering cooling of a dry resin type transformer with a cabin. The effect of the cabin on the product in terms of natural heat convection is also evaluated.

Air knives with very different nominal values are used for various purposes in the industry. The uses of air knives include the painting and coating stages of automobile semi-finished products, as well as many stages related to food production. One of the important sectors among these is the continuous hot-dip galvanizing process, which is a coating technique in the steel industry. In addition, the chemical coating process on paper as a very thin layer is another research topic. The most critical process needed in these sectors is to ensure a homogeneous air-flow at the expected air speed of the air-knife. These determine whether the coating on the steel or the chemical layer on the paper is homogeneous at the desired thickness. In this study, it is aimed that the air-knife can reach the expected values (speed and homogeneous distribution) with the expected tolerances, the shortest time, cost, and the least production process error. First, a design has been made so that this knife can blow air at the desired speed and homogeneously. For this, the most appropriate modeling and design values were created and analyzed with the CFD. The analysis and evaluations of the design were confirmed as a result of the measurements made on the prototype. This study shows that the inclusion of this type of modeling and analysis in the rapid product development process has an important role in minimizing cost and time.

Information and communication technologies (ICT) play an important role in engineering. For this reason, this study aims to reveal the pattern of computer usage of engineering students, and evaluate the impact of students' computer and self-efficacy in their higher education. A questionnaire was administered to target students from three departments; Mechanical, Industrial, and Electrical & Electronics engineering located in the Engineering faculty. It was observed that the increase in the use of computers and the increased availability of software tools significantly affected the learning behaviors and expectations of engineering students.

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