Proceedings on Engineering Sciences

4

Authors: R Rohith, G Ruthvik, Punithkanthraj, K P Raju, T S Nanjundeshwaraswamy

Chemical Machining (CHM) is a non-conventional machining process, which is used to machine hard brittle materials. The objective of this paper is a literature survey related to the chemical machining process. In this machining process, the chemical energy of the etchant is used to remove the excess materials from the workpiece; materials will be removed through the chemical dissolution process. In the literature, it is identified that so many factors influence the process of chemical machining such as concentrate of etchant, the temperature of the etchant, masking methods, types of the masking and etchants. It is also identified that these process parameters influence the material removal rate (MRR) and surface finish.

6

Authors: Zeynab Abdullayeva

If the amount of high-molecular components in oil transportation, group, structure and fraction composition, mixed in the analysis of other oils in laboratory analysis are correctly determined in the oil, it will be very effective in solving technological problems during transportation. On the basis of numerous studies the anomalous changes of rheophysical features of different crude oil mixes were investigated. It was defined that one of the main reasons for the anomaly is the variety of chemical composition and structure of miscible crude oils. We have established the mechanism of the effect of structural-group and fractional oil content on its physicochemical properties and theological characteristics resulting from a high content of high molecular components due to different solubility of liquid hydrocarbons relative to the latter ones.

6

Authors: Branislav Milenkovic, Mladen Krstic, Djordje Jovanovic

In this paper, we present the ant colony optimization algorithm (ACO for short), which was used to solve gear box problem design. Biological fundamentals of ACO algorithm, as well as method explanation are presented. The pseudo code for this algorithm was written using Matlab R2018a software suite. At the end, the results obtained by ACO algorithm are compared to the results previously obtained by other algorithms.

10

Authors: Anant Kumar, Joginder Singh

Corrosion implies to the irreparable damage or demolition of living tissues or materials due to electrochemical reactions. The automotive sector is rather bellicose and gives rise to metal corrosion in automotive parts due to high amount of pollution generated and due to de-icing salts. In power plants, corrosion is the principal agent leading to costly and critical downtimes. The water-steam circuits in fossil and nuclear power plants are inherently prone to corrosion, as metal components are constantly in contact with water. This review paper provides the overview of distinct types of corrosion in automotive and thermal power plant, their causes and measures to prevent them.

10

Authors: Bongumusa Cebekhulu, Paul Ozor

Whereas quality management practices are important enterprise-level instruments for strategic management, enterprise resource planning systems (ERP) play a pivotal role in business process integration. The later presents potentialities for better information flows and improved control over company resources. The successful integration of QM practices and ERP system can offer a head-start in decision-making, planning, and execution to the organizations’ performance. This research scrutinises the elements of QM practices and ERP systems and assesses the relationship between organizational culture and organizational performance. The research uses the case of twenty-one public sector organizations in South Africa. Structural Equation Modelling was utilized to examine the research hypotheses. The research revealed that the QMS practices have an indirect influence on organizational performance while ERP systems possesses both positive and direct effect on organizational performance.

10

Authors: Kashif HassanManoj Kumar, Sajad Hussain Din

The augmentation of heat transfer through different ways has been developing as an intense area of research since many years. The recent increase in the use of heat exchangers for industrial applications has called for improvement in their design, efficiency & compactness. In general, the thermal resistance offered by the gases (air in particular is pretty large; therefore, performance of heat exchangers with gas as the working fluids becomes practically important. One of the most common techniques for compensating the poor heat transfer properties of gases is that the surface area density of plate heat exchangers be increased by using the secondary fins such as offset fins, triangular fins, wavy fins, louvered fins etc. In addition to this a promising technique for enhancement of heat transfer is use of longitudinal vortex generators. The longitudinal vortices are produced due to the pressure difference generated between the front and back of the vortex generator. The longitudinal vortices facilitate the exchange of fluid near the walls with the fluid in the core and hence, the thermal boundary layer is disturbed. It causes an increase in temperature gradient at surface which leads to heat transfer augmentation. An innovative design of triangular shaped secondary fins with rectangular wing or winglet vortex generator mounted on the bottom of the channel for enhancing heat transfer is proposed. The computational details have been given for analysis of problem in the ANSYS FLUENT 18 which mainly describes about the solution algorithm and solution schemes as well as under relaxed factors required for the recent problems. As the solution is converged after certain number of iterations, the value of pressure-drop and Nusselt number, average temperature, friction factor is calculated for different attack angles and at different locations and compared with plain channel for same parameter.