This book provides a computational framework of radiative heat transfer in participating media to help engineers and researchers in developing their own codes for radiative heat transfer analysis, starting from simple benchmark problems and extend further to industry scale problems. The key feature of the book is the presentation of concepts of radiation keeping in view the need of the engineers, researchers and practitioners, and help them to perform more comprehensive radiative transfer calculations, make more physics-based approximations, start developing their own basic codes and use them in their problems of interest. Some salient attractions are: 1. A comprehensive computational framework for radiative heat transfer in participating media 2. A modular approach to solve the radiative heat transfer in cylindrical, conical, and rectangular geometries 3. Treatment of radiative properties of gases, gas mixtures, particles, and particle clusters 4. Generic numerical framework based on Finite Volume and Spectral line based weighted sum of gray gases method 5. A guide to develop your own solver for radiation 6. MATLAB based easy to implement codes 7. Strategy of optimizing process parameters in industry problems 8. Neural network based smart predictor and optimizer tools development Contents 1 Introduction 2 State of the art on Radiative transfer in participating media 3 Mathematical Formulations and Solution Methodology 4 Radiative Transfer in Cylindrical Geometries with a Participating Medium 5 Radiative Transfer in Conical Geometries with a Participating Medium 6 Radiative Heat Transfer in Three Dimensional Rectangular Geometries with a Participating Medium 7 Inverse Problem of Discrete Heaters in Radiant Furnaces 8 Closure, Appendix, Formulation of Mie Scattering Theory, Radiative Properties of Soot based on Temperature and Type of Fuel, MATLAB Codes for the important problems, References. About the Authors: Dr Rahul Yadav completed his PhD in Mechanical Engineering from IIT Madras in the year 2018 and served as an Institute Post Doctoral Fellow at IIT Kanpur for 2.5 years. He has more than 7 years of experience as a researcher in Radiative heat transfer in participating media. He has around 6 publications to his credit in reputed international journals in topics related to computational radiative heat transfer and neural networks. He is a reviewer for several international journals. He has been awarded a Pre doctoral fellowship from IIT Madras and is also a recipient of Institute Post-Doctoral Fellowship from IIT Kanpur. Prof. C. Balaji is a fellow of Indian National Academy of Engineering and TT Narendran Chair Professor at IIT Madras, Chennai. He has around 26 years of experience in combined mode heat transfer-experimental and numerical, atmospheric radiation, satellite data assimilation and optimization. He has published more than 180 international journal papers and is a reviewer to many of them. He is also the Editor-in-Chief of International Journal of Thermal Sciences, Elsevier Ltd. Since 2015. He has authored post graduate level textbooks on Essentials of Radiation Heat Transfer and Design and Optimization of Energy Systems. He is also a recipient of Humboldt Fellowship 2005, Young Faculty Recognition Award 2007, Swarna Jayanti Fellowship 2008 (Govt of India), Prof KN Seetharamu medal, Tamil Nadu Scientist Award 2010 (Govt of Tamil Nadu), and Mid-Career Research Award 2015 (IIT Madras). Prof. SP Venkateshan is an Emeritus Professor and Advisor at IIIT-DM Kancheepuram. He has more than 43 years of research experience in the area of radiative heat transfer, conjugate heat transfer – experimental and numerical, measurement of thermo physical properties by inverse heat transfer methods, instrumentation. He has provided his services to Indian Institute to Technology Maras for more than 30 years and retired as Head, Department of Mechanical Engineering, IIT Madras. He has also served as Head, Regional Sophisticated Instrumentation Center (RSIC) at IIT Madras during 1997-2001. He has more than 200 archival research publications to his credit and is author of three graduate level books such as Computational Methods in Engineering, Mechanical Measurements, and Heat Transfer.