Please use this identifier to cite or link to this item: http://elar.urfu.ru/handle/10995/112177
Title: Computer Simulations of Dynamic Response of Ferrofluids on an Alternating Magnetic Field with High Amplitude
Authors: Zverev, V.
Dobroserdova, A.
Kuznetsov, A.
Ivanov, A.
Elfimova, E.
Issue Date: 2021
Publisher: MDPI
MDPI AG
Citation: Computer Simulations of Dynamic Response of Ferrofluids on an Alternating Magnetic Field with High Amplitude / V. Zverev, A. Dobroserdova, A. Kuznetsov et al. // Mathematics. — 2021. — Vol. 9. — Iss. 20. — 2581.
Abstract: The response of ferrofluids to a high-amplitude AC magnetic field is important for several applications including magnetic hyperthermia and biodetection. In computer simulations of the dynamic susceptibility of a ferrofluid outside the linear response region, there are several problems associated with the fact that an increase in the frequency of the AC field leads to the appearance of additional computational errors, which can even lead to unphysical results. In this article, we study the dependence of the computational error arising in the computer simulation of the dynamic susceptibility on the input parameters of the numerical algorithm: the length of the time step, the total number of computer simulation periods, and averaging period. Computer simulation is carried out using the Langevin dynamics method and takes Brownian rotational relaxation of magnetic particles and interparticle interactions into account. The reference theory [Yoshida T.; Enpuku K. Jap. J. Ap. Phys. 2009] is used to estimate computational error. As a result, we give practical recommendations for choosing the optimal input parameters of the numerical algorithm, which make it possible to obtain reliable results of the dynamic susceptibility of a ferrofluid in a high-amplitude AC field in a wide frequency range. © 2021 by the authors. Licensee MDPI, Basel, Switzerland.
Keywords: COMPUTATIONAL ERROR
COMPUTER SIMULATIONS
DYNAMIC MAGNETIC SUSCEPTIBILITY
FERROFLUID
INTERPARTICLE INTERAC-TIONS
LANGEVIN DYNAMICS
URI: http://elar.urfu.ru/handle/10995/112177
Access: info:eu-repo/semantics/openAccess
SCOPUS ID: 85117523822
WOS ID: 000716873800001
PURE ID: 23898936
ISSN: 2227-7390
DOI: 10.3390/math9202581
metadata.dc.description.sponsorship: Funding: This research was funded by the Ministry of Science and Higher Education of the Russian Federation (Ural Mathematical Center project No. 075-02-2021-1387).
Appears in Collections:Научные публикации ученых УрФУ, проиндексированные в SCOPUS и WoS CC

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