https://repositorio.ufu.br/handle/123456789/19223 Wed, 12 Aug 2026 20:54:12 GMT 2026-08-12T20:54:12Z https://repositorio.ufu.br/handle/123456789/49479 Title: Introdução à mecânica dosfFluidos computacional Abstract: Computational Fluid Dynamics (CFD) has consolidated itself as a fundamental tool for predicting flow behavior in engineering applications, enabling the computational solution of systems of partial differential equations whose continuous solution is, in general, unfeasible. In this context, the present work aimed to develop and validate numerical solvers for three classical incompressible and Newtonian flows: the transient Couette flow, the two-dimensional Poiseuille flow in a rectangular cross-section duct, and the flow inside a lid-driven cavity. Starting from the Navier-Stokes and mass balance equations, the partial differential equations that model each problem were simplified according to the applicable hypotheses and discretized by the Finite Difference Method. For the Couette flow, both explicit and fully implicit time-marching schemes were implemented. For this flow, a complete energetic analysis was also developed: the continuous and discrete solutions for the mechanical power delivered by the moving plate, for the viscous power converted into thermal energy through the transformation φ function, and for the total kinetic energy of the flow were derived, latter obtained through two independent calculation routes, and the mechanical energy balance relating these quantities was verified both analytically and numerically, from the impulsive start to the steady state. For the two-dimensional Poiseuille flow an implicit scheme was adopted, whose pentadiagonal linear system was solved by the iterative Gauss-Seidel method. For the cavity, projection method was employed on a staggered grid, with boundary conditions treated through ghost cells. The implementations were performed in MATLAB, C and Fortran 90, allowing a direct comparison between interpreted and compiled languages and between direct and iterative strategies for solving linear systems. The computational results were compared with the available continuous solutions for the Couette and Poiseuille flows and with the reference data from (GHIA; GHIA; SHIN, 1982) for the cavity at Reynolds numbers 100, 400 1000 and 10.000. The computational solution of the Poiseuille flow presented a relative error below 0.02% with respect to the analytical solution at steady state, and the cavity simulations faithfully reproduced the central velocity profiles, including the capture of the recirculations at the lower corners for Re = 1000 and 10.000. The performance comparison showed that the choice of algorithm had a significantly greater impact on the processing time than the choice of programming language. It is concluded that the implemented solvers are consistent, stable and accurate within the laminar regimes simulated, and that proper decisions regarding algorithm and data structure are determinant for the computational feasibility of CFD simulations. Mon, 29 Jun 2026 00:00:00 GMT https://repositorio.ufu.br/handle/123456789/49479 2026-06-29T00:00:00Z https://repositorio.ufu.br/handle/123456789/49413 Title: Proposta de implementação de um sistema Kanban para gestão de estoques em um negócio de montagem de computadores Abstract: The present work aims to propose the implementation of a Kanban system for inventory management in a computer store focused on assembling and selling computers. The hardware sector faces high price volatility and component shortages driven by the global demand for artificial intelligence, requiring strict logistical control from companies to avoid stockouts and excessive capital immobilization. The adopted methodology consisted of a quali-quantitative case study, based on the analysis of eighteen months of operational data from the establishment. The ABC Curve was used to classify components by financial representativeness, prioritizing class A and B items. Based on the calculation of average demand, lead time, and safety stock, a visual Kanban board was structured, divided into ideal condition, attention, and urgency zones. To validate the proposal, operational simulations were carried out testing scenarios of demand peaks and delays from international suppliers. The results demonstrated that the proposed model acts as an efficient predictive alert mechanism, allowing to anticipate the depletion of critical parts. It is concluded that the transition from reactive control to a pull system, based on lean manufacturing principles, optimizes the allocation of working capital, reduces logistical waste, and ensures the operational continuity of the business. Tue, 19 May 2026 00:00:00 GMT https://repositorio.ufu.br/handle/123456789/49413 2026-05-19T00:00:00Z https://repositorio.ufu.br/handle/123456789/49068 Title: Integração de sustentabilidade em gestão de projetos em startups Tue, 07 Jul 2026 00:00:00 GMT https://repositorio.ufu.br/handle/123456789/49068 2026-07-07T00:00:00Z https://repositorio.ufu.br/handle/123456789/49025 Title: Aplicação de rotinas de planejamento e controle de manutenção em uma indústria de fertilizantes Abstract: This paper presents a theoretical study and practical application of maintenance planning and control for a coated fertilizer production plant. The records, coding, mapping and standardization of all equipment were carried out in the management system used by the company. After this consolidated procedure, with the assistance of the company's maintenance professionals and process operators, maintenance plans and routines for planning and scheduling work orders were created. As a result, there is the immediate identification of equipment, costs savings related to maintenance and standardization of maintenance routines and work orders. Thu, 30 Nov 2023 00:00:00 GMT https://repositorio.ufu.br/handle/123456789/49025 2023-11-30T00:00:00Z