European Journal of Engineering Science and Technology <p>European Journal of Engineering Science and Technology (EJEST) is a peer-reviewed, open-access journal that provides rapid publication of articles in all areas of Engineering Science and Technology. EJEST is an international, scholarly and peer-reviewed journal (online) published semiannually by Diamond Scientific Publication.</p> en-US (If you have any questions, please feel free to contact us:) (-) Mon, 12 Jun 2023 13:15:14 +0000 OJS 60 Simulations and Results for the Heat Transfer Problem <p>In many studies of the heat transfer problems, many scientifics have studied the heat transfer problems by solving partial differential equations without any use of approximations or finding the solutions with experimental data. In this paper, we analyze the heat transfer problem using a heat source in a closed environment and how it transfers in the neighboring sections. We refer to mathematical concept to make possible the simplification of the complexity that associates such thermodynamic problems. We will discuss such a problem as a discrete one, easily computable, rather than treating it as a continuous one. We have reduced this problem into solving a simple system of linear equations and differential equations. In many cases differential equations are hard and difficult to solve. So, we use numerical methods to approximate the differential equations to algebraic equations and solve them. We will compare different algorithms used and show which one of them performs better under our test conditions. The program will simulate the heat transfer of a single heat source in a closed environment. The results of the simulations will be presented in graphs and demonstrated in visual settings. In the end, we will provide our conclusions on the performance of the numerical methods. We achieve the purpose of this study, which is to analyze the heat generation analysis and heat transport in three-dimensional space as to the neighboring sides of a closed environment.</p> Shkelqim Hajrulla, Arban Uka, Taylan Demir Copyright (c) 2023 European Journal of Engineering Science and Technology Mon, 12 Jun 2023 00:00:00 +0000 Properties of Jute Fibre Reinforced Polymer Composites – A Review <p>Jute fibres is of great interest to be used as reinforcement in thermoset or thermoplastic composites, in order to provide positive environmental benefits in-terms of degradability, abundance, low density, nominal cost and recyclable. During fabricating the composites, researchers facing complications such as high water absorbing (WA) character, poor incompatibility of fibre with resins, quality variations in fibres, low thermal stability, etc. Therefore, chemical treatments are considered and it will be the most effective way to enhance the interfacial bonding with matrix, improve mechanical strength and less WA as well. Many research works were carried out on the influence of chemical treatment on the properties of jute fibre and their composites. The investigated treatment methods and the impact of chemical treatment on the properties of jute fibre reinforced polymer composites are comprehensively presented in this review.</p> B.Pradeepa, M.Malathi; Kiruthika A.V. Copyright (c) 2023 European Journal of Engineering Science and Technology Mon, 12 Jun 2023 00:00:00 +0000 Review of Mathematical Surface Water’s Hydrodynamic/Water Quality Models with Their Application on the Shatt Al Arab River Southern Iraq <p>The hydrodynamic/water quality model is an important tool in water environment management. It is used to gain a deeper understanding of physical, chemical, and biological processes and to develop models capable to represent surface waters with realism. A hydrodynamic model can give essential data to sediment, noxious, and eutrophication modelling. Models enable decision-makers to select alternatives for water quality management that are superior and more scientifically justifiable. They also provide a basis for economic analysis to evaluate environmental significance and cost-benefit ratio. The presented study reviewed a variety of research that used various techniques for surface water modeling. The first section focused on the studies conducted on the Shatt Al Arab River and its branches in Basrah province southern Iraq. The second section included studies conducted on various local and global applied cases. As for the third section, it reviewed the studies that used the method of linking models to produce a more effective system, which is the approach we recommend using it in building a comprehensive model of the Shatt al-Arab river. The model will connect the HEC-RAS software, which is known for its competence in modeling complex two-dimensional situations, with the WASP program, which has a high ability to represent a wide range of water pollutants that HEC-RAS cannot represent, especially in a two-dimensional model.</p> Mohammed Mawat, Ahmed N. Hamdan Copyright (c) 2023 European Journal of Engineering Science and Technology Mon, 12 Jun 2023 00:00:00 +0000