Conduction-dominated heat transport of the annual temperature signal in soil

Temperature Profiles in Hamiltonian Heat Conduction

We study heat transport in the context of Hamiltonian and related stochastic models with nearest-neighbor coupling, and derive a universal law for the temperature profiles of a large class of such models. This law contains a parameter α , and is linear only when α = 1. The value of α depends on energy-exchange mechanisms, including the range of motion of tracer particles and their times of flight.

Heat conduction in molecular transport junctions

Heating and heat conduction in molecular junctions are considered within a general nonequilibrium Green’s function formalism. We obtain a unified description of heating in current-carrying molecular junctions as well as the electron and phonon contributions to the thermal flux, including their mutual influence. Ways to calculate these contributions, their relative importance, and ambiguities in...

Transport regimes in quasiballistic heat conduction

Transient grating (TG) spectroscopy is an important experimental technique to measure mean-free-path (MFP) spectra using observations of quasiballistic heat conduction. To obtain MFP spectra, the measurements must be interpreted within the framework of the frequency-dependent Boltzmann transport equation (BTE), but previous solutions have restricted validity due to simplifying assumptions. Here...

Determination of the ambient temperature in transient heat conduction

heat and contaminant transport in unsaturated soil

solute transport in unsaturated porous media can be viewed as a coupled phenomenon with waterand heat transport, together with mechanical behaviour of media. in this paper, solute transport is formulatedmathematically considering heat and water flow in deformable porous media. advection, dispersion anddiffusion of chemical species in the liquid phase are considered. convection and conduction fo...