3-D printing 1 3D printing 1 3D printing lattice channel 1 3D-printing 1 3d printing lattice channel 1 Alumina 1 Aluminum oxide 1 Convective heat transfer 1 Drops 1 Experimental test 1 Heat convection 1 Heat transfer and pressure drop Heat transfer co-efficients 1 Heat transfer coefficients 1 Nanofluidics 1 Nanofluids 1 Nanoparticles 1 Periodic cellular materials 1 Pressure drop 1 Pressure drop measurements 1 Suspensions (fluids) 1 Thermodynamic properties 1 additive manufacturing 1 convective heat transfer 1 nanofluids 1 periodic cellular material 1