Details

Autor(en) / Beteiligte

• Achhal, El Mehdi
• Jabraoui, Hicham
• Zeroual, Soukaina
• Loulijat, Hamid
• Hasnaoui, Abdellatif
• Ouaskit, Said

Titel

Modeling and simulations of nanofluids using classical molecular dynamics: Particle size and temperature effects on thermal conductivity

Ist Teil von

• Advanced powder technology : the international journal of the Society of Powder Technology, Japan, 2018-10, Vol.29 (10), p.2434-2439

Ort / Verlag

Elsevier B.V

Erscheinungsjahr

2018

Link zum Volltext

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• [Display omitted] •The efficiency of nanofluids is improved when the particle size and temperature increase.•The thermal conductivity of nanofluid increases with the increases of the volume fraction.•The thermal conductivity of nanofluid increases with the augmentation of temperature.•Thermal conductivity enhancement due to the fluid condensation around the nanoparticle.•Thermal conductivity enhancement due to the decreasing specific surface of the solid–liquid. We use molecular dynamics simulations to investigate the thermal conductivity of argon-based nanofluid with copper nanoparticles through the Green-Kubo formalism. To describe the interaction between argon-argon atoms, we used the well-known Lennard-Jones (L-J) potential, while the copper–copper interactions are modeled using the embedded atom method (EAM) potential that takes the metallic bonding into account. The thermal conductivity of the pure argon liquid obtained in the present simulation agreed with available experimental results. In the case of nanofluid, our simulation predicted thermal conductivity values larger than those found by the existing analytical models, but in a good accordance with experimental results. This implies that our simulation is more adequate, to describe the thermal conductivity of nanofluids than the previous analytical models. The efficiency of nanofluids is improved and the thermal conductivity enhancement is appeared when the particle size and temperature increase.