Mass transfer Heat and mass transfer 14 Heat transfer 11 Numerical methods 6 heat and mass transfer 6 Air 5 Cooling 5 Flow rate 5 Magnetohydrodynamics 5 Boundary layers 4 Computational fluid dynamics 4 Drying 4 Efficiency 4 Evaporative cooling systems 4 Ordinary differential equations 4 Porous materials 4 Reynolds number 4 % reductions 3 Aspect ratio 3 Cooling performance 3 Energy efficiency 3 Finite difference method 3 Flow of gases 3 Flow patterns 3 Gravitation 3 Heat pipes 3 Heat transfer coefficients 3 Mass-flow rate 3 Nanofluidics 3 Numerical approaches 3