Molecular dynamics study of barrier effects on Ferro- nanofluid flow in the presence of constant and time-dependent external magnetic fields

In this work, the computational method is implemented to study the atomic barrier effects on water/Fe3O4 nanofluid manner in the presence external magnetic field. The Copper nanochannel by 3 atomic barriers is simulated to flow of water/Fe3O4 nanofluids. Results show that the density, velocity, and temperature profiles of water/Fe3O4 nanofluid inside Cu nanochannel changed by adding atomic barriers to the interior surface of the nanochannel. Furthermore, the effects of nanoparticle number variation on the dynamical manner of nanofluids calculated. From a numerical perspective, the aggregation time of Fe3O4 nanoparticles in simulated systems varies from 1 ns to 0.75 ns by adding a magnetic field to simulated nanofluid. This mechanical manner arises from external force powering by adding constant and time-dependent magnetic field to the simulation box. Finally, we reported that the constant and time-dependent external magnetic field cause nanofluids agglomerates in a short time rather than magnetic field-free models. (C) 2020 Elsevier B.V. All rights reserved.