Heat Transfer Enhancement by Using Nanofluids in Laminar Forced Convection Flows Considering Variable Properties


Nanofluids are considered to offer important advantages over conventional heat transfer fluids. The effects of alumina nanoparticles on convective heat transfer through a circular tube with a constant heat flux condition in a laminar flow regime have been numerically studied. The effects of nanoparticles concentration and Reynolds number are investigated in three types of base heat transfer fluids, which are pure water, water-ethylene glycol mixture and pure ethylene glycol. In general heat transfer enhancement, increase considerably with an augmentation of the Reynolds number. Also heat transfer increase with increasing the particle concentration.

  • Abstract
  • Key Words
  • 1. Introduction
  • 2. Assumptions
  • 3. Governing Equations
  • 4. Boundary Conditions
  • 5. Thermo Physical Properties of Nanofluids
  • 6. Numerical Modeling
  • 7. Results and Discussion
  • 8. Conclusion
  • References

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