Molecular dynamics simulation of ferronanofluid behavior in a nanochannel in the presence of constant and time-dependent magnetic fields

摘要

In this work, the molecular dynamics method is implemented to study the time evolution of water/Fe(3)O(4)nanofluid dynamics with constant and time-dependent magnetic fields. The nanochannel with four walls is simulated to carrier water base-fluid and spherical Fe(3)O(4)nanoparticles in a nanochannel. Simulations reveal that the density, velocity, and temperature profiles of nanofluid inside copper nanochannel are increased by increasing the nanoparticle numbers. Our results show that the simulated nanofluids with magnetic forces agglomerate faster. Furthermore, the effects of nanoparticles' number on the aggregation process are examined. Also, when the magnetic fields are subjected to nanofluid atomic structure, this external parameter prevents the aggregation of Fe(3)O(4)nanoparticles, and so the assembly rate decreases and needed longer time for this phenomenon to occur. Physically, our results show that the magnetic field with normal direction to the nanofluid flow affects to the simulation process. This external parameter avoids the movement of nanoparticles along the fluid flow direction, and aggregation of these nanostructures occurs at a long time.