Computational analysis of heat transfer in three types of motorcycle exhaust materials

Abstract

The finite element method is one method used in the structural and nonstructural analysis. This paper aims to the simulated of the finite element method on nonstructural problems namely heat transfer. The media used has been a motorcycle exhaust system modeled with COMSOL Multiphysics 5.4 software by combining annealed stainless steel 405 with 35% chrome stainless steel, Beta-21S Titanium, and Carbon II type as a large tube on the exhaust model. The results of computing simulation obtained are that the lowest heat transfer value in Carbon II material type with a heat transfer rate of 325 K.

A Mathematical Approach to Dampening Sea Waves Using Submerged Permeable Breakwater

“…In the conclusion of the research on shallow water, waves will be several steps of solution that are to be discretization of the wave equation of water in general then made the determination of the initial value and the limit conditions of the model of the wavelength equation, the next step is to modify the waves equation with the addition of the variable wave breaker that aims to give a negative value of the acceleration of seawater wave 𝑢 𝑡𝑡 the negative value is assumed as the excellent retention of sea wave should be opposed from the direction of the wind wave so that will reduce the value of wavelength (𝜆) and wave speed (𝑣) as well as the momentum of the 𝑝 𝑥 wave (𝑡). Once the wave equation with the ocean wave breaker has been modified, the next step is to perform a simulation using COMSOL Multiphysics 5.6 based on elements up to which it is combined with the finite element against the domain of the wavelength breaker model to obtain a representation of the distribution of amplitude, speed, and energy with several variations of wave freeze simulation (Tulus et al, 2020;. The stages in the solution carried out in this study are: 1.…”

Heat transfer problem analysis in three dimension tromol brake system problem

“…COMSOL Multiphysics is a program that uses the concept of finite element method to solve a physical problem and shows simulation of the problem solving. Which basically simulates whatever it wants: simulates heat transfer through complex structures, nanoscale photonic crystals, bending mechanical beams, fluid flow, electrochemical processes, plasma physics and more [5]. Parameters used in this research can be seen in Table 1 below.…”

“…For observing the fundamental orthogonality relation and . Taken equation from Ritz-Galerkin Approximation and weak formula implies, ( − , ) = 0, ∀ (5) this equation and its variation we get from Ritz-Galerkin method. Now define,…”

Analysis of the Use and Application of Mathematics in Economics: Demand and Supply Functions

“…Overall, research developments in this field reflect the increasing complexity of the global economic environment and the need for more sophisticated and adaptive analytical tools. It also shows that mathematics is not only a tool in economic analysis but also a universal language that enables more effective communication between different disciplines and practitioners [12], [13]. With the continuous development of technology and research methodologies, it is expected that the mathematical analysis of the function of supply and demand will continue to progress, providing deeper insights and more innovative solutions to future economic challenges [14].…”