Testing the minimum thermal conductivity model for amorphous polymers using high pressure
نویسندگان
چکیده
Wen-Pin Hsieh,1,2,* Mark D. Losego,3 Paul V. Braun,2,3 Sergei Shenogin,4 Pawel Keblinski,4 and David G. Cahill2,3 1Department of Physics, University of Illinois, Urbana, Illinois 61801, USA 2Frederick-Seitz Materials Research Laboratory, University of Illinois, Urbana, Illinois 61801, USA 3Department of Materials Science and Engineering, University of Illinois, Urbana, Illinois 61801, USA 4Department of Materials Science and Engineering, Rensselaer Polytechnic Institute, Troy, New York 12180, USA (Received 6 April 2011; published 19 May 2011)
منابع مشابه
High thermal conductivity in electrostatically engineered amorphous polymers
High thermal conductivity is critical for many applications of polymers (for example, packaging of light-emitting diodes), in which heat must be dissipated efficiently to maintain the functionality and reliability of a system. Whereas uniaxially extended chain morphology has been shown to significantly enhance thermal conductivity in individual polymer chains and fibers, bulk polymers with coil...
متن کاملCrystalline polymers with exceptionally low thermal conductivity studied using molecular dynamics
Semi-crystalline polymers have been shown to have greatly increased thermal conductivity compared to amorphous bulk polymers due to effective heat conduction along the covalent bonds of the backbone. However, the mechanisms governing the intrinsic thermal conductivity of polymers remain largely unexplored as thermal transport has been studied in relatively few polymers. Here, we use molecular d...
متن کاملPredicting the thermal conductivity of inorganic and polymeric glasses: The role of anharmonicity
The thermal conductivity of several amorphous solids is numerically evaluated within the harmonic approximation from Kubo linear-response theory following the formalism developed by Allen and Feldman. The predictions are compared to the results of molecular dynamics (MD) simulations with realistic anharmonic potentials and to experimental measurements. The harmonic theory accurately predicts th...
متن کاملBuoyancy Term Evolution in the Multi Relaxation Time Model of Lattice Boltzmann Method with Variable Thermal Conductivity Using a Modified Set of Boundary Conditions
During the last few years, a number of numerical boundary condition schemes have been used to study various aspects of the no-slip wall condition using the lattice Boltzmann method. In this paper, a modified boundary condition method is employed to simulate the no-slip wall condition in the presence of the body force term near the wall. These conditions are based on the idea of the bounce-back ...
متن کاملBeating the amorphous limit in thermal conductivity by superlattices design
The value measured in the amorphous structure with the same chemical composition is often considered as a lower bound for the thermal conductivity of any material: the heat carriers are strongly scattered by disorder, and their lifetimes reach the minimum time scale of thermal vibrations. An appropriate design at the nano-scale, however, may allow one to reduce the thermal conductivity even bel...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
عنوان ژورنال:
دوره شماره
صفحات -
تاریخ انتشار 2011