Smart Innovations and Constructions 111 © MANTECH PUBLICATIONS 2021. All Rights Reserved Computational Flow and Thermal Analysis of Motorbike Exhaust Muffler Maun Vadukul 1 , Aman Mehta 2 , Prem singh Rajpurohit 3 , Parth Patel 4 , Ravindra Gupta 5 Department of Mechanical Engineering Parul University, Vadodara, India. Email: maunvadukul@gmail.com 1 ,ravindra.gupta@paruluniversity.ac.in 5 DOI:- https://doi.org/10.47531/SIC.2022.13 Abstract With the increasing demand for automobile vehicle and their usages its influence on environmental pollution and human health, it is very important to engineer it in the best optimum design with respect to its life, emissions and manufacturing cost. Also, with an increase in the maintenance of various components of vehicles demand new effective design and their analyses have increased. In this work, we focused on the life of the exhaust system of a motorbike in which high-temperature gases pass and get cool and also sound emissions are decreased and then released to the atmosphere. Gases stay more time in silencers than other parts of the exhaust system to reduce the noise level. The uniform heat distribution over the entire exhaust system is important for ensuring the enhanced life of elements in the sub-system. Therefore, uniform heat flow is necessary along the passage surface to minimise the harmful effect of hotspots over the length of the silencer, especially at the outer body of the silencer. We introduced that providing different types of patterns uniform over the surface of the muffler results in better heat dissipation throughout the surface, which will decrease the oxidation rate of metal with oxygen present in air and rust formation. So, we made CAD files using CREO Parametric of mufflers having different patterns on the surface. The pattern designs which can be manufactured easily are to be made. Further CAD models will be analysed in ANSYS by thermal analysis to observe which pattern is best among those made. Keywords: - Muffler, Silencer, Heat Flux, CFD INTRODUCTION Mufflers or silencer in the exhaust system of every vehicle is an acoustic device to reduce the loudness of the sound pressure created by the engine. Straight-through design mufflers consist of an inner perforated tube, an outer solid tube and fibreglass insulation between the two tubes. They often have less back pressure than original equipment mufflers but are relatively ineffective at reducing sound levels. A chambered muffler consists of a series of concentric or eccentric pipes inside the expansion chamber cavity. Sound waves