BACKGROUND Nanofluids are suspensions of nanoparticles and fibers which have recently attracted much attention because of their superior thermal properties. Nevertheless, it was proven that, due to modest dispersion of nanoparticles, such high expectations often remain unmet. In this article, by introducing the notion of nanofin, a possible solution is envisioned, where nanostructures with high...

electrical, structural and morphological properties of ni silicide films formed in ni(pt 4at.% )/si(100) and ni0.6si0.4(pt4at.% )/si(100) structures at various annealing temperatures ranging from 200 to 1000 oc were studied. the ni(pt) and ni0.6si0.4(pt) films with thickness of 15 and 25 nm were deposited by rf magnetron co-sputtering method, respectively.  the annealing process of the structur...

Hidden defects affecting the interface in a composite slab are evaluated from thermal data collected on upper side of specimen. First we restrict problem to component object. Then investigate heat transfer through, inaccessible by means Thin Plate Approximation. Finally, Fast Fourier Transform is used filter data. In this way, obtain reliable reconstruction simulated flaws contact conductance c...

In 1983 J Pendry published a paper on the quantum limits to the flow of information and entropy [Pendry'83]. In it he showed that there is an inequality that limits the flow of information as a function of the energy flow. He applied this relationship to calculate the limit on the rate of heat flow in a channel and found that this had to be 1 2 2 3 1 − ≤ h T kB π where kB is Boltzmann constant ...

We study electron transport through a multichannel fractional quantum Hall edge in the presence of both interchannel interaction and random tunneling between channels, with emphasis on role contacts. The prime example our discussion is at filling factor 2/3 two counterpropagating channels. Having established general framework to describe contacts as thermal reservoirs, we particularly focus lin...

: We present phonon thermal conductance calculations for silicon nanowires (SiNWs) with diameters ranging from 1 to 5 nm with and without vacancy defects by the non-equilibrium Green's function technique using the interatomic Tersoff-Brenner potentials. For the comparison, we also present phonon thermal conductance calculations for diamond nanowires. For two types of vacancy defects in the SiNW...

An approximate analytical model is developed for predicting the heat transfer of interstitial gases in the gap between conforming rough contacts. A simple relationship for the gap thermal resistance is derived by assuming that the contacting surfaces are of uniform temperature and that the gap heat transfer area and the apparent contact area are identical. The model covers the four regimes of g...

The concepts of temperature and entropy as applied in equilibrium thermodynamics do not easily generalize to nonequilibrium systems and there are transient systems where thermodynamics cannot apply. However, it is possible that nonequilibrium steady states may have a thermodynamics description. We explore the consequences of a particular microscopic thermostat-reservoir contact needed to both s...

We investigate the effect of confinement and orientation on the phonon transport properties of ultrathin silicon layers of thicknesses between 1 nm and 16 nm. We employ the modified valence force field method to model the lattice dynamics and the ballistic Landauer transport formalism to calculate the thermal conductance. We consider the major thin layer surface orientations {100}, {110}, {111}...