Nanofluids Heat 43 Transmission 40 Heat exchangers 25 Thermal properties 24 Fluid dynamics 17 Thermodynamics 8 Nanostructured materials 7 Thermal conductivity 6 Microfluidics 4 Nusselt number 4 Solar collectors 4 Turbulence 4 Convection 3 Fluid mechanics 3 Graphene 3 Heat pipes 3 Mathematical models 3 Technological innovations 3 Aluminates 2 Carbon 2 Computational fluid dynamics 2 Friction 2 Heat storage 2 Materials 2 Nanoparticles 2 Nanotechnology 2 Optical properties 2 Radiation and absorption 2 Refrigerants 2