Computer Simulations of Dynamic Response of Ferrofluids on an Alternating Magnetic Field with High Amplitude

The response of ferrofluids to a high-amplitude AC magnetic field is important for several applications including hyperthermia and biodetection. In computer simulations the dynamic susceptibility ferrofluid outside linear region, there are problems associated with fact that an increase in frequency leads appearance additional computational errors, which can even lead unphysical results. this article, we study dependence error arising simulation on input parameters numerical algorithm: length time step, total number periods, averaging period. Computer carried out using Langevin dynamics method takes Brownian rotational relaxation particles interparticle interactions into account. reference theory [Yoshida T.; Enpuku K. Jap. J. Ap. Phys. 2009] used estimate error. As result, give practical recommendations choosing optimal algorithm, make it possible obtain reliable results wide range.