Preface Chapter 1: Polymers and Composites Optimization of Defect Localization in Ultrasonic Images of CFRP Multidirectional Plates Based on Complex Geometry Rice Husk Fiber-Based Polishing Pad for Chemical Mechanical Polishing (CMP) of Sapphire Influence of Filler on the Interfacial Strength between TPE and PP Composites A Preliminary Investigation on Recycled PET-Derived Polyurethane Films: Role of NCO/OH Ratio in Film Development Structural Study of Modified-Recycled PET from Drinking Bottle Waste by Using Multifunctional Chain Extenders Effects of Plasticizers on Physical and Mechanical Properties of Tamarind Kernel Powder-Gelatin Film TiO-Chitosan Functionalized Polypropylene Nonwovens for Air Filtration Applications Chapter 2: Biowaste to Energy Conversion Process Design and Optimisation of Parameters for the Production of Energy from Wood Biomass via Pyrolysis Enhancing Eco-Friendly Biodiesel Production from Waste Cooking Oil Using Rice Husk, Coconut Husk and Chicken Manure as a Catalyst The Effect of Thermochemical Pretreatment on Lignin Breakdown and Biogas Yield from Co-Digested Sawdust and Cowdung Chapter 3: Heat and Mass Transfer Flow in a Three-Sided Lid-Driven Cavity: Genesis of Vortices under Asymmetric Parallel Upward Motion Thermal and Entropy Analysis of Flow Dynamics in a Constant-Volume Double Lid-Driven Trapezoidal Cavity Machine Learning Prediction of Skin Friction and Heat Transfer in Walter-B Ternary Nanofluid Flow with Cross-Diffusion and Entropy Generation Chapter 4: Thermal Engineering Numerical Analysis of the Effect of Water Cooling Method on Temperature Distribution and Efficiency of Photovoltaic Systematic Literature Review of Ice Slurry Compounds: Viscosity Characteristics, Heat Transfer and Applications.