Effect of viscosity of base fluid on thermal conductivity of nanofluids

Tsung-Han Tsai; Long-Sheng Kuo; Ping-Hei Chen; Chin-Ting Yang
December 2008
Applied Physics Letters;12/8/2008, Vol. 93 Issue 23, p233121
Academic Journal
This study aims to investigate the effect of viscosity of the base fluid on the thermal conductivity of nanofluids in which Fe3O4 nanoparticles are suspended in the base fluid composed of diesel oil and polydimethylsiloxane. Viscosity of the base fluid is varied by changing the volumetric fractions between both fluids. The measured thermal conductivity of nanofluids gradually approaches the value predicted by the Maxwell equation by increasing the viscosity. It demonstrates that the viscosity of nanofluids does affect the thermal conductivity of nanofluids, and the Brownian motion of suspended particles could be an important factor that enhances the thermal conductivity of nanofluids.


Related Articles

  • A CFD Study of Turbulent Convective Heat Transfer Enhancement in Circular Pipeflow. Kumar, Perumal; Ganesan, Rajamohan // World Academy of Science, Engineering & Technology;2012, Issue 68, p457 

    Addition of milli or micro sized particles to the heat transfer fluid is one of the many techniques employed for improving heat transfer rate. Though this looks simple, this method has practical problems such as high pressure loss, clogging and erosion of the material of construction. These...

  • Synthesis and thermal characterization of phase-changeable indium/polyalphaolefin nanofluids. Han, Z. H.; Cao, F. Y.; Yang, B. // Applied Physics Letters;6/16/2008, Vol. 92 Issue 24, p243104 

    Previous research on nanofluids has primarily focused on how to increase thermal conductivity of the fluids. Here, the use of phase change materials as nanoparticles in nanofluids has been proposed to simultaneously enhance the effective thermal conductivity and specific heat of the fluids. As...

  • INFLUENCE OF NANOPARTICLE VOLUME FRACTION, PARTICLE SIZE AND TEMPERATURE ON THERMAL CONDUCTIVITY AND VISCOSITY OF NANOFLUIDS -- A REVIEW. Ravisankar, B.; Chand, V. Tara // International Journal of Automotive & Mechanical Engineering;Jul/Dec2013, Vol. 8, p1316 

    In the present paper a critical literature review of nanofluid thermal conductivity and viscosity is performed. Experimental studies are discussed in terms of the effects of some parameters such as particle volume fraction, particle size, and temperature on thermal conductivity and viscosity of...

  • Thermal Conductivity and Viscosity of Nanofluids Containing Chain-like Silver Clusters. Haitao Zhu; Feng Qiao; Daxiong Wu; Canying Zhang; Wei Li // Current Nanoscience;Oct2011, Vol. 7 Issue 5, p813 

    Ag nanofluids with different concentration (0.03~0.12vol%) were prepared by dispersing chain-like Ag clusters into ethylene glycol. The thermal conductivity and rheological behaviors of the Ag nanofluids were investigated at temperatures ranging from room temperature (15.8 °C) to 65 °C....

  • Thermal conductance of nanofluids: is the controversy over? Pawel Keblinski; Ravi Prasher; Jacob Eapen // Journal of Nanoparticle Research;Oct2008, Vol. 10 Issue 7, p1089 

    Abstract  Over the last decade nanofluids (colloidal suspensions of solid nanoparticles) sparked excitement as well as controversy. In particular, a number of researches reported dramatic increases of thermal conductivity with small nanoparticle loading, while others showed...

  • Smart dust / The power of powder. Sanderson, Katharine // New Scientist;7/6/2013, Vol. 218 Issue 2924, p02 

    The article looks at research into the addition of nanoparticles into liquid coolants to improve energy efficiency. Researcher Hidetoshi Matsuda and team discovered in 1993 that aluminum and titanium oxide nanoparticles increased the thermal conductivity of water, and researchers Stephen Choi...

  • Nanofluids Containing γ-Fe2O3 Nanoparticles and Their Heat Transfer Enhancements. Shou-Zhu Guo; Yang Li; Ji-Sen Jiang; Hua-Qing Xie // Nanoscale Research Letters;Jul2010, Vol. 5 Issue 7, p1222 

    Homogeneous and stable magnetic nanofluids containing γ-Fe2O3 nanoparticles were prepared using a two-step method, and their thermal transport properties were investigated. Thermal conductivities of the nanofluids were measured to be higher than that of base fluid, and the enhanced values...

  • Particle shape effects on thermophysical properties of alumina nanofluids. Timofeeva, Elena V.; Routbort, Jules L.; Singh, Dileep // Journal of Applied Physics;Jul2009, Vol. 106 Issue 1, p14304 

    The thermal conductivity and viscosity of various shapes of alumina nanoparticles in a fluid consisting of equal volumes of ethylene glycol and water were investigated. Experimental data were analyzed and accompanied by theoretical modeling. Enhancements in the effective thermal conductivities...

  • Turbulent Heat Transfer Behavior of Nanofluid in a Circular Tube Heated under Constant Heat Flux. Torii, Shuichi // Advances in Mechanical Engineering (Hindawi Publishing Corporati;2010, Vol. 2010, p1 

    The aim of the present study is to disclose the forced convective heat transport phenomenon of nanofluids inside a horizontal circular tube subject to a constant and uniform heat flux at the wall. Consideration is given to the effect of the inclusion of nanoparticles on heat transfer...


Read the Article


Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics