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On flow characteristics of liquid-solid mixed-phase nanofluid inside nanochannels

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Abstract

The atomic behavior of liquid-solid mixed-phase nanofluid flows inside nanochannels is investigated by a molecular dynamics simulation (MDS). The results of visual observation and statistic analysis show that when the nanoparticles reach near each other, the strong interatomic force will make them attach together. This aggregation continues until all nanoparticles make a continuous cluster. The effect of altering the external force magnitude causes changes in the agglomeration rate and system enthalpy. The density and velocity profiles are shown for two systems, i.e., argon (Ar)-copper (Cu) nanofluid and simple Ar fluid between two Cu walls. The results show that using nanoparticles changes the base fluid particles ordering along the nanochannel and increases the velocity. Moreover, using nanoparticles in simple fluids can increase the slip length and push the near-wall fluid particles into the main flow in the middle of the nanochannel.

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Abbreviations

F ij :

intermolecular force on molecule i by molecule j, N

F ext :

external applied force, N

M :

molecule mass, kg

P :

pressure, Pa

r c :

cutoff distance, nm

r ij :

position between molecules i and j, nm

t :

time, s

T :

temperature, K

V :

volume of system, (nm)3

V i :

velocity of molecule i, m/s

ɛ :

energy parameter in Lennard-Jones (LJ) potential, J

σ :

molecular length scale, nm

τ :

characteristic time, s

ρ :

density, kg/m3

φ :

interaction potential, J

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Authors and Affiliations

  1. Department of Mechanical Engineering, University of Tabriz, Tabriz, 51666-14766, Iran

    H. Aminfar & N. Razmara

  2. Department of Mechanical Engineering, Azarbaijan Shahid Madani University, Tabriz, 53751-71379, Iran

    M. Mohammadpourfard

Authors
  1. H. Aminfar
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  2. N. Razmara
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  3. M. Mohammadpourfard
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Correspondence to N. Razmara.

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Aminfar, H., Razmara, N. & Mohammadpourfard, M. On flow characteristics of liquid-solid mixed-phase nanofluid inside nanochannels. Appl. Math. Mech.-Engl. Ed. 35, 1541–1554 (2014). https://doi.org/10.1007/s10483-014-1889-6

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  • DOI: https://doi.org/10.1007/s10483-014-1889-6

Key words

Chinese Library Classification

2010 Mathematics Subject Classification

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