Title Molecular Dynamics Study of Ferrofluid Flow Inside Nanochannels Under Magnetic Fields Type of Research Article Keywords Aggregation, Ferrofluid, Molecular Dynamics, Nanochannel, Magnetic Field. Abstract Molecular dynamics simulations are carried out to study the time evolution of flowing nanofluid with magnetic and non-magnetic nanoparticles. The nanochannel model is composed of carrier liquid and spherical nanoparticles dispersed in it between two parallel walls. The interactions of magnetic nanoparticles are based on magnetic dipole–dipole interaction potential. Simulations reveal that the system with magnetic nanoparticles agglomerates faster than that of non-magnetic nanoparticles. Also, the effects of longitudinal and latitudinal magnetic fields on aggregation process are examined. It is shown that the aggregation rate of magnetic nanoparticles flowing inside nanochannels decreased by applying an external magnetic field. Researchers Habib Aminfar (First Researcher)، Naiyer Razmara (Second Researcher)، (Third Researcher)