Wave-like heat propagation is shown to emerge as a consequence of rapidly varying temperature field in Ge.

Overview This proposal aims to build up new ties between Princeton University (PU) and the University of São Paulo (USP) in order to explore innovative semiconductor devices. The focus of the project is to create an interaction between the groups in the development of new semiconductor devices. The collaborative research will be based in the growth and characterization of thermoelectric materia...

Structural defects such as cracks have recently been identifiable through a new nondestructive evaluation (NDE) technique know as sonic IR or thennosonics. However, these defects are depicted through thennal imagining system as localized "hoI spots" indicating a general location of a defect without an accurate portrayal of the dimensions or shape of the defect. This paper demonstrates a new tec...

The heat transfer equation was used to model the heat distribution in an intervertebral disk during ultrasound (US) exposure. The influence of thermal and acoustic parameters was studied to get a quantitative understanding of the heat transfer in the system. Heating of collagen to 65 degrees C or above will lead to denaturation and is believed to stabilize and contract the outer part of the dis...

This study presents the simulation of the specific absorption rate (SAR), fluid flow and heat transfer in an anatomical human eye exposed to EM fields in the supine position. In this study, the frequencies of 900 and 1800 MHz were chosen for our simulations. This work focuses on the aqueous humor natural convection of the lying human eye induced by electromagnetic (EM) fields. In this study, th...

We consider a reaction-diffusion system of the KPP type in a shear flow and with a non-zero heat loss parameter. We establish criteria for the flame blow-off and propagation, and identify the propagation speed in terms of the exponential decay of the initial data. We prove existence of traveling fronts for all speeds c > max(0, c∗) in the case Le = 1, where c∗ ∈ R. That seems to be one of the f...

Fractional derivatives are well suited to describe wave propagation in complex media. When introduced in classical wave equations, they allow a modeling of attenuation and dispersion that better describes sound propagation in biological tissues. Traditional constitutive equations from solid mechanics and heat conduction are modified using fractional derivatives. They are used to derive a nonlin...

We investigate the thermal transport originating from the propagation of surface plasmon polaritons (SPPs) in a thin gold stripe. The SPPs are excited by a grating coupler on the Au stripe which was patterned onto a silicon membrane. The transmissivity changes of the Si membrane due to temperature-induced changes of the interference conditions enable measuring the temperature distribution with ...

We present a numerical method to study convective heat transfer in a high Reynolds number incompressible flow around a cylinder subject to uncertain boundary conditions. We exploit the one-way coupling of the energy and momentum transport to derive a semi-intrusive uncertainty propagation scheme, which combines Galerkin and collocation approaches for computing approximate statistics of the stoc...