publication . Other literature type . Article . 2018

Numerical Simulation of Nanofluid Suspensions in a Geothermal Heat Exchanger

Hongbin Yan; Wei-Tao Wu; Mehrdad Massoudi; Xiao-hui Sun; Zhihua Chen;
Open Access
  • Published: 13 Apr 2018
  • Publisher: MDPI AG
It has been shown that using nanofluids as heat carrier fluids enhances the conductive and convective heat transfer of geothermal heat exchangers. In this paper, we study the stability of nanofluids in a geothermal exchanger by numerically simulating nanoparticle sedimentation during a shut-down process. The nanofluid suspension is modeled as a non-linear complex fluid; the nanoparticle migration is modeled by a particle flux model, which includes the effects of Brownian motion, gravity, turbulent eddy diffusivity, etc. The numerical results indicate that when the fluid is static, the nanoparticle accumulation appears to be near the bottom borehole after many ho...
arXiv: Physics::Fluid DynamicsPhysics::Geophysics
free text keywords: nanofluids, geothermal heat exchanger, suspension stability, pulsed flow, nanoparticle accumulation, Technology, T, General Computer Science, Fluid dynamics, Thermal diffusivity, Geothermal heating, Convective heat transfer, Geothermal gradient, Nanofluid, Mechanics, Heat exchanger, Suspension (vehicle), Materials science
Energy Research
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Article . 2018
Article . 2018
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