Why nanofluids have high thermal conductivity?

The scattering of the primary carriers of energy at the boundaries of nanoparticles is called phonon scattering [48]. As the nanoparticle size decreases, the surface area to volume ratio increases, which allows for more effective heat transfer at the solid–liquid interface, leading to increased thermal conductivity.

How do you find the thermal conductivity of nanofluids?

Using Fourier’s equation in cylindrical co-ordinates, the thermal conductivity of nanofluid in the gap can be calculated by the equation,(12) k = ln ( r 2 / r 1 ) 2 π L [ ( Δ T / Q ˙ e ) − ( ln ( r 3 / r 2 ) / 2 π L k c ) ] where the heat input, Q ˙ e (W) was calculated from measurement of the current and voltage …

Why do we use Nanofluids?

Nanofluids are primarily used for their enhanced thermal properties as coolants in heat transfer equipment such as heat exchangers, electronic cooling system(such as flat plate) and radiators. Heat transfer over flat plate has been analyzed by many researchers.

Which of the following is thermal property of nanoparticle?

Carbon nanotubes (CNTs) have a thermal conductivity of about 3000 W/mK, and a high aspect ratio of about 2000. Nanoparticles have low particle momentum and very high mobility. The small size of the molecules allows for free movement and hence microconvection, which promotes heat transfer.

Do nanoparticles conduct electricity?

Nanoparticles such as carbon nanotubes and graphene oxide exhibit some of the highest electrical conductivities for use EMI applications. The conductive pathways formed by the nanoparticles absorb the EM radiation and dissipate the resulting stress throughout the matrix [20].

What are the types of nanofluids?

Nanofluid

  • Photovoltaics.
  • Viscosity.
  • Heat Flux.
  • Thermal Conductivity.
  • Ethylene Glycol.
  • Heat Transfer Coefficient.
  • Base Fluid.
  • Nanoparticle.

How nanofluids are made?

A nanofluid can be produced by mixing a nanoparticle-based powder in a suitable base fluid. The mixture then undergoes sonication to break up any particle agglomerations formed during mixing to create a well-dispersed nanoparticle suspension.

Why do we use nanofluids?