Nanofluids are considered as interesting alternatives to conventional coolants. It is well known that traditional fluids have limited heat transfer capabilities when compared to common metals. It is therefore quite conceivable that a small amount of extremely fine metallic particles placed in suspension in traditional fluids will considerably increase their heat transfer performances. A numerical investigation into the heat transfer enhancement capabilities of coolants with suspended metallic nanoparticles inside a radial, laminar flow cooling configuration is presented. Temperature dependant nanofluid properties are evaluated from experimental data available in recent literature. Results indicate that considerable heat transfer increases are possible with the use of relatively small volume fractions of nanoparticles. Generally, however, these are accompanied by considerable increases in wall shear-stress. Results also show that predictions obtained with temperature variable nanofluid properties yield greater heat transfer capabilities and lower wall shear stresses when compared to predictions using constant properties. It is well known that traditional fluids have limited heat transfer capabilities when compared to common metals. It is well known that traditional fluids have compared with conventional metals. It is well known that traditional fluids have compared to conventional metals. A numerical investigation into the heat transfer enhancement capabilities of coolants with heat transfer enhancement capabilities of coolants with covalent metallic nanoparticles inside a radial, laminar flow cooling configuration is presented. heat transfer increases are possible with the use of the relatively small volume fractions of nanoparticles. [0013] Also, however, these are accompanied by increases in wall shear-stress. Results also show that predictions obtained with temperature variable nanofluid properties yield greater heat transfer capabilities and lower wall shear stresses when compared to predictions using constant properties.