International Journal of Current Engineering and Technology E-ISSN 2277 – 4106, P-ISSN 2347 – 5161 ©2016 INPRESSCO ® , All Rights Reserved Available at http://inpressco.com/category/ijcet Review Article 63| MIT College of Engineering, Pune, India, AMET 2016, INPRESSCO IJCET Special Issue-4 (March 2016) A Review Paper on Numerical Simulation of Moving Heat Source Sudesh B. Powar †* , Prashant M. Patane † and Shailesh L Deshmukh † † Department of Mechanical Engineering, MIT Academy of Engineering, Alandi, Pune, India Accepted 02 March 2016, Available online 15 March 2016, Special Issue-4 (March 2016) Abstract The problems of heat conduction resulting from a moving heat source applies to many fields of engineering such as welding, surface hardening, moving friction between mechanical parts, laser treatments etc. Heat source models are used to define the heat flux distribution in the domain.An attempt has been made to gather the information about moving heat source problems and different heat source models. The optimal design reduces failure rates, improves product life cycle and important to all it will find out defects due to temperature distribution within the material. The analytical solutions are available for simple problems but as the complexicity increases the analytical solutions fail to predict results. Numerical method is a key to solve many complicated mathematical problems. Keywords: Moving Heat Source, Heat Source Models. 1. Introduction 1 Stationary and moving plane heat source analysis have application in several manufacturing processes such as metal cutting, spot welding, laser cutting/surface treatment (using CO2 or Argon lasers) as well as tribological applications including ball bearing and gear design. Temperature profile and the rate of cooling at and near the surface can affect the metallurgical microstructures, thermal shrinkage, thermal cracking, hardness distribution, residual stresses and heat affected zones of the material. Analytical and numerical models for the prediction of the thermal fields induced by the stationary or moving heat sources are useful tools for studying the above mentioned problems. Knowing temperature distribution in tribological applications due to frictional heat generation is required to minimize thermal related problems such as lubricant break down. Generated heat at the surface of one body or at the contact interface between two bodies in industrial processes, such as laser welding, breaking systems, friction between two mediums and so on, is often modeled by using the concept of moving heat source in stationary and transient case. Most of this heat is expended on the increase in the temperature of the contact interface. This local temperature increase can strongly affect the surface properties of materials. Thus, the temperature level plays an important role in various applications and should be carefully controlled. The various investigations can be divided into two categories: *Corresponding author: Sudesh B. Powar 1) Analytical solutions which are possible in some special cases of geometry and boundary conditions. 2) Numerical methods that provide results for practically any combination of geometry and boundary conditions. There are mainly four data required in the thermal analysis of moving heat source problem (1) The strength and distribution of the heat source. (2) The convection of cooling media, which reflects the effect of coolant, (3) The thermal properties of the work material, and (4) The moving speed of the heat source. 2. Literature Review A good understanding of the heat transfer process in the moving heat source can be helpful for predicting temperature distribution in workpiece. Several papers have been written on the moving heat source, some of them were seeking for analytical solution while other uses numerical methods to solve the problem. Their research has been made for particular application of moving heat source like welding, laser, grinding, etc. only. N. Bianco, et al. A laser source with Gaussian distribution is considered moving with const velocity along motion direction as shown in Fig. 1. These 3- dimensional transient conductive fields are solved by COMSOL Multiphysics code. The thermophysical properties of the material are assumed to be temperature dependent except density. They produced