Effect of hydration layer and surface wettability in enhancing thermal conductivity of nanofluids

Sachdeva, Parveen; Kumar, Ranganathan
November 2009
Applied Physics Letters;11/30/2009, Vol. 95 Issue 22, p223105
Academic Journal
In a molecular dynamics study of water based nanofluids, we show that a hydration layer is formed at the particle-fluid interface, where the attraction or cohesive potential between the liquid molecules is dominant. In the hydration layer, the collision mode rather than the kinetic or potential mode is primarily responsible for the enhancement of thermal transport properties in nanofluids, as it results in more interactions. The thermal conductivity for a wetting particle is found to be higher than for a neutral or a nonwetting particle.


Related Articles

  • Wetting kinetics of water nano-droplet containing non-surfactant nanoparticles: A molecular dynamics study. Lu, Gui; Hu, Han; Duan, Yuanyuan; Sun, Ying // Applied Physics Letters;12/16/2013, Vol. 103 Issue 25, p253104 

    In this Letter, dynamic wetting of water nano-droplets containing non-surfactant gold nanoparticles on a gold substrate is examined via molecular dynamics simulations. The results show that the addition of non-surfactant nanoparticles hinders the nano-second droplet wetting process, attributed...

  • How hydrophobic hydration responds to solute size and attractions: Theory and simulations. Athawale, Manoj V.; Jamadagni, Sumanth N.; Garde, Shekhar // Journal of Chemical Physics;9/21/2009, Vol. 131 Issue 11, p115102 

    We focus on the hydration of a methane and spherical single and multisite C60 and C180 solutes over a range of solute-water attractions to quantify the vicinal water structure and their hydration thermodynamics using extensive molecular dynamics simulations and theory. We show that water...

  • Adsorption of hydrogen atoms and oxygen molecules on zinc oxide and titanium oxide on the surface conductivity and work function. An'chkov, D. G.; Davydov, S. Yu.; Troshin, S. V. // Technical Physics Letters;Sep2008, Vol. 34 Issue 9, p795 

    A change in the substrate work function has been calculated using the Anderson-Newns model for H/ZnO, O2/ZnO, and O2/TiO2 systems in the interval of submonolayer adsorbate coverages (0 ≤ Θ ≤ 1). Using the relation Δ G/Δϕ = const obtained previously, where Δ G and...

  • Investigation into the Structure of Langmuir–Blodgett Films Prepared from Salts of Acetylenic Acids. Sveshnikova, L. L.; Badmaeva, I. A.; Dembo, K. A.; Yanusova, L. G. // Crystallography Reports;Sep2005, Vol. 50 Issue 5, p854 

    Langmuir–Blodgett films are prepared from lead, cadmium, and copper salts of carboxylic acids, namely, 23-tetracosynoic acid HC≡C(CH2)21COOH (with the terminal triple bond) and 2-docosynoic acid CH3(CH2)18C≡CCOOH (with the internal triple bond). The structural transformations...

  • Differential cross sections and product energy distributions for the C(3P)+OH(X 2Π)→CO(X 1Σ+)+H(2S) reaction using a quasiclassical trajectory method. Zanchet, Alexandre; Halvick, Philippe; Bussery-Honvault, Béatrice; Honvault, Pascal // Journal of Chemical Physics;5/28/2008, Vol. 128 Issue 20, p204301 

    Quasiclassical trajectory calculations have been carried out for the C(3P)+OH(X 2Π)→CO(X 1Σ+)+H(2S) reaction using a recent ab initio potential energy surface for the ground electronic state X 2A′ of COH. Differential cross sections (DCSs), and product vibrational, rotational...

  • Interfacial properties of semifluorinated alkane diblock copolymers. Pierce, Flint; Tsige, Mesfin; Borodin, Oleg; Perahia, Dvora; Grest, Gary S. // Journal of Chemical Physics;6/7/2008, Vol. 128 Issue 21, p214903 

    The liquid-vapor interfacial properties of semifluorinated linear alkane diblock copolymers of the form F3C(CF2)n-1(CH2)m-1CH3 are studied by fully atomistic molecular dynamics simulations. The chemical composition and the conformation of the molecules at the interface are identified and...

  • Ethene Oxidation on Pd(111): Kinetic Hysteresis Induced by Carbon Dissolution. Gabasch, Harald; Knop-Gericke, Axel; Schlögl, Robert; Unterberger, Werner; Hayek, Konrad; Klötzer, Bernhard // Catalysis Letters;Dec2007, Vol. 119 Issue 3/4, p191 

    The catalytic oxidation of ethene was studied on Pd(111) in the 10−7–10−6 mbar pressure range by a molecular beam TPR hysteresis experiment between 400 K and 1,000 K. Two important effects were identified: the reaction-blocking effect of a dense chemisorbed adlayer of oxygen...

  • Towards SiC surface functionalization: An ab initio study. Cicero, Giancarlo; Catellani, Alessandra // Journal of Chemical Physics;6/1/2005, Vol. 122 Issue 21, p214716 

    We present a microscopic model of the interaction and adsorption mechanism of simple organic molecules on SiC surfaces as obtained from ab initio molecular-dynamics simulations. Our results open the way to functionalization of silicon carbide, a leading candidate material for biocompatible devices.

  • Quantifying electron transfer during hyperthermal scattering of C60+ from Au(111) and n-alkylthiol self-assembled monolayers. Jester, Stefan-Sven; Weis, Patrick; Hillenkamp, Matthias; Ehrler, Oli T.; Böttcher, Artur; Kappes, Manfred M. // Journal of Chemical Physics;4/14/2006, Vol. 124 Issue 14, p144704 

    A tandem time-of-flight mass spectrometer with an intermediate surface was used to quantify electron transfer during glancing incidence scattering of hyperthermal C60+ (Ecoll=250–500 eV, θin=75°) from (i) self-assembled monolayers of n-alkylthiols on gold (of various chain lengths),...


Read the Article


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

Try another library?
Sign out of this library

Other Topics