Engineering and Systems > Home > Uncertainties and Reliability of Multiphysical Systems > Issue
In certain industries, the different operations are very complex, and a small error may lead to a catastrophe. So, there is a strong need to establish an effective maintenance program to avoid any possible error. A concept called Reliability-Centered Maintenance (RCM) was found in the 1960s and initially oriented towards maintaining aircrafts. The objective of this overview is to present the different difficulties when implementing RCM strategy in other industrial fields. So, we first present some RCM concepts and next deal with the most used assessment methods such as Risk Priority Number (RPN) method and Military Standard one. Failure Mode and Effect Analysis (FMEA) as a structured approach is used next to discover potential failures that may exist within a product design or production process. Far away from aviation industry, a coffee maker is considered as an illustrative example to provide the newcomers with a simplified way to implement the RCM concepts in different industrial sectors. Several failure modes considering MSG-3 standard are presented to provide the suitable preventive maintenance actions. Finally, a discussion and future perspective section provides some critical points and future propositions when implementing this strategy in other industrial fields such as additive manufacturing.
The main objective of this paper is to study the performance of a methodology based on the multiple relaxation time Lattice Boltzmann Method (MRT-LBM) to solve the two-equation turbulence model k - ϵ, and accurately treat incompressible flow at high Reynolds numbers (Re) in regions with curved corners and boundaries. To achieve this objective, we opted for wall-driven flow in a semicircular cavity. On the basis of the numerical results obtained and presented in this article, the model shows its ability to capture the formation of primary, secondary and tertiary vortices as the Reynolds number Re increases, and this presents a good agreement with the literature.
