Numerical study of instability of nanofluids: the coagulation effect and sedimentation effect

This study is a numerical study on the coagulation as well as the sedimentation effect of nanofluids using the Brownian dynamics method. Three cases are simulated, focusing on the effects of the sizes, volume fraction, and ζ potentials of nano-particles on the formation of coagulation and sedimentation of nanofluids. The rms fluctuation of the particle number concentration, as well as the flatness factor of it, is employed to study the formation and variation of the coagulation process. The results indicate a superposition of coagulation and sedimentation effect of small nano-particles. Moreover, it is stable of nanofluids with the volume fraction of particles below the limit of "resolution" of the fluids. In addition, the effect of ζ potentials is against the formation of coagulation and positive to the stability of nanofluids.

• Publication year

  2011

• Venue

  Nanoscale Research Letters

• Publication date

  2011-02-28

• Fields of study

  Medicine, Materials Science, Physics, Engineering

• Identifiers
  DOI 10.1186/1556-276X-6-183PMID 21711686PMCID 3211237
• External record

  Open on Semantic Scholar

• Source metadata

  Semantic Scholar, PubMed

• No claims are published for this paper.

• No concepts are published for this paper.

• Nanoparticle deposition effects on the minimum heat flux point and quench front speed during quenching in water-based alumina nanofluids

  2010cited by this paper
• Review and Comparison of Nanofluid Thermal Conductivity and Heat Transfer Enhancements

  2008cited by this paper
• Characteristic boiling curve of carbon nanotube nanofluid as determined by the transient calorimeter technique

  2007cited by this paper
• Nanofluids for thermal transport

  2005cited by this paper
• THERMAL TRANSPORT IN NANOFLUIDS1

  2004cited by this paper
• Effect of nanoparticles on critical heat flux of water in pool boiling heat transfer

  2003cited by this paper
• Investigation on Convective Heat Transfer and Flow Features of Nanofluids

  2003cited by this paper
• Local Structure Evolution in Particle Network Formation Studied by Brownian Dynamics Simulation.

  2000cited by this paper
• Coagulation rates in concentrated colloidal suspensions studied by Brownian dynamics simulation

  1999influential reference
• Thermal Conductivity of Nanoparticle -Fluid Mixture

  1999cited by this paper
• Solid-liquid dispersions

  1999cited by this paper
• Measuring Thermal Conductivity of Fluids Containing Oxide Nanoparticles

  1999cited by this paper
• Brownian dynamics simulation of sedimented colloidal suspensions

  1999cited by this paper
• Study on antiwear and reducing friction additive of nanometer titanium oxide

  1998cited by this paper
• Brownian dynamics simulation of gelation in soft sphere systems with irreversible bond formation

  1997cited by this paper
• Enhancing Thermal Conductivity of Fluids With Nanoparticles

  1995cited by this paper
• Brownian dynamics simulation of sediment formation of colloidal particles

  1992cited by this paper
• Sediment formation by Brownian dynamics simulation: Effect of colloidal and hydrodynamic interactions on the sediment structure

  1986cited by this paper
• Brownian dynamics with hydrodynamic interactions

  1978cited by this paper
• Variational Treatment of Hydrodynamic Interaction in Polymers

  1969cited by this paper

• A novel adjustable magnetorheological fluid gradient material of low frequency vibration isolation: a theoretical and experimental study

  2024cites this paper
• Nanofluids in solar collectors: a comprehensive review focused on its sedimentation

  2024cites this paper
• Long-term experimental study on gravitational sedimentation of water aluminum oxide nanofluid at different volumetric concentrations

  2023cites this paper
• Study on the influence of composition parameters of magnetorheological fluid on its vibration transmission characteristics

  2023cites this paper
• Improving the biocompatibility and antibacterial efficacy of silver nanoparticles functionalized with (LLRR)3 antimicrobial peptide

  2023cites this paper
• Spatial distribution of nanoparticles in PWR nanofluid coolant subjected to local nucleate boiling

  2016cites this paper