The influence of the multiscale fracture roughness on the heat exchange when a cold fluid enters a fractured hot solid is studied numerically on the basis of the Stokes equation and in the limit of both hydrolubrication and thermolubrication. The geometrical complexity of the fracture aperture is modeled by small self-affine perturbations added to a uniform aperture field. Thermal and hydraulic...

We combine results of high-resolution microfluidic experiments with extensive numerical simulations to show how the flow patterns inside a “swiss-cheese” type pore geometry can be systematically controlled through intrinsic rheological properties fluid. Precisely, our analysis reveals that velocity field in interstitial space tends display enhanced channeling under certain conditions. This obse...

In this work we have measured the contribution of the Coulomb explosion to the electronic stopping power of molecular hydrogen ions (H+2 and H + 3 ) channeling along the Si 〈100〉 direction. To this end, we have used a SIMOX target, consisting of a crystalline 〈100〉 Si with a buried layer of SiO2. The measurements of the energy loss of H, H+2 and H + 3 have been carried out using the standard ch...

In electron scattering from crystals, diffraction spots are replaced by Kikuchi patterns at high momentum transfer. Kikuchi pattern formation is based on the concept of effective incoherent electron sources (or detectors) inside a crystal. The resulting incoherence is a consequence of energy transfer connected with the momentum transfer in large-angle scattering events. We identify atomic recoi...