Preface Chapter 1: Numerical Investigation of Heat and Mass Transfer Processes Numerical Simulation of Natural Convection in an Inclined Cavity Filled with Ionanofluid Analytical and Numerical Study of Double Diffusion Natural Convection in a Shallow Enclosure with Nanofluids: Impact of the Lewis Number on Heat and Mass Transfers Lattice Boltzmann Method Simulations of Laminar Mixed Convection in an Inclined Lid-Driven Cavity Discretely Heated and Filled with Nanofluid Numerical Study of Mixed Convection Flows around Large-Scale Heat Sinks: Application to Data Center Cooling Natural Air Convection Using LBM in a Cavity Heated Linearly Theoretical Analysis and Numerical Simulation of Thermosolutal Mixed Convection in a Vertically Oriented Rectangular Enclosure Free Convective Thermal Transmission through Different Shapes of Enclosures: An Overview Sustainable Aerodynamics Analysis of Heavy Vehicles: Solution for Drag Reduction Investigation of Temperature Influence on Mass Transfer during Sustainable Biodiesel Production from Castor Oil A Study on the Effect of Wire-Net Stainless Steel Porosity on Heat Transfer Enhancement in a Solar Air Heater Simulation and Optimization of Heating Networks Chapter 2: Sustainable Energy Materials PotentialResolved In Situ Atomic Force Microscopy of Surface Film Formation on Graphite in Ethylene Carbonate with Lithium Perchlorate Direct Regeneration of LFP Cathode Material from Spent Li-Ion Batteries via Aqueous Relithiation Monolith Multilayer Catalytic Membrane for Direct Conversion of CO2- Rich Natural Gas into Syngas and Energy.