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May 29, 2026Geoenergy Science and Engineering0 citationsOpen Access

Surface-Modified Nanofluids for Enhanced Heat Transfer in Closed-Loop Geothermal Systems: Numerical Modeling and Validation

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SMSeyedeh Maryam MousaviSKSaeid KhasiAKApostolos Kantzas

Key Points

  • This research aims to evaluate the impact of dual APTES/SDS surface modification on the heat transfer properties of nanofluids in geothermal systems.
  • Numerical modeling using finite element method (FEM) to analyze heat transfer characteristics.
  • Modification of nanofluids with dual surfactants APTES and SDS to enhance thermal properties.
  • Comparative analysis of different nanofluid compositions to assess stability and conductivity.
  • Hybrid nanofluids displayed a 30% increase in thermal conductivity with an 8% reduction in viscosity at low loading conditions.
  • Graphene/APTES modified nanofluids achieved the highest thermal conductivity ratio of 1.43 while maintaining stable rheology.
  • Interfacial engineering significantly enhanced heat transfer compared to the effects of fluid composition.

Abstract

• Dual APTES/SDS modification improved nanofluid stability and heat transfer. • Hybrid nanofluids showed +30% thermal conductivity and −8% viscosity at ultra-low loading. • FEM linked nanoscale coating to macroscopic heat enhancement. • Graphene/APTES achieved highest thermal conductivity ratio (1.43) with stable rheology. • Interfacial engineering outperformed fluid composition effects.

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Cite This Study

Mousavi et al. (2026) studied this question.

synapsesocial.com/papers/6a192c67fab5b468c44153fchttps://doi.org/10.1016/j.geoen.2026.214561
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