We address the problem of making quantitative measurements of local flow velocities in turbulent liquid helium, using tracer particles. We survey and evaluate presently available particles and previous work to establish the need to develop new particles for the purpose. We present the first practical solution for visualizing fluid motions using a suspension of solid hydrogen particles with diam...

We consider the system of acoustic equations governing oscillations two-phase solid media with periodic microstructure. If phases consist plane layers an elastic or viscoelastic material, we show that coefficients and kernels convolutions homogenized depend not only on number distance between layers, but also volume fraction each phase inside periodicity cell.

When the permittivities, or dielectric properties, of granular or powdered solid materials are important, some reliable relationship between the permittivity and the bulk density of the air-particle mixture is required. Examples of such applications include radio-frequency or microwave dielectric heating of these materials and the use of correlations between permittivity and water content of hy...

When knowledge of the dielectric properties, or permittivity, of granular or powdered materials is important, as in dielectric heating applications or in the sensing of moisture content by radio-frequency or microwave instruments, some reliable relationship between the dielectric properties and the bulk density of the material is required. Linear relationships between functions of the permittiv...

Understanding erosion and entrainment of material by debris flows is essential for predicting modelling debris-flow volume growth hazard potential. Recent advances in field, laboratory studies have distilled two driving forces behind erosion: impact shear forces. How these depend on composition interact remains unclear. Here, we experimentally investigate the effects processes a small-scale flu...

Abstract The rheological characterization of concentrated suspensions is complicated by the heterogeneous nature their flow. In this contribution, shear viscosity and wall slip velocity are quantified for highly (solid volume fractions 0.55–0.60, D 4,3 ~ 5 µm). was determined using a high-pressure capillary rheometer equipped with 3D-printed die that has grooved surface internal flow channel. t...

research in convective heat transfer using suspensions of nanometer-sized solid particles in base liquids started only over the past decade. recent investigations on nanofluid, as such suspensions are often called, indicate that the suspended nanoparticles remarkably change the transport properties and heat transfer characteristics of the suspension. bending walls can also improve heat transfer...

We present the application of the smoothed particle hydrodynamics (SPH) discretization scheme to Phillips' model for shear-induced particle migration in concentrated suspensions. This model provides an evolution equation for the scalar mean volume fraction of idealized spherical solid particles of equal diameter which is discretized by the SPH formalism. In order to obtain a discrete evolution ...

For a two-phase swelling porous medium, two pressures have been previously defined thermodynamically in terms of intensive variables for each phase: one relating the change in energy with respect to specific volume, and the other relating the change in energy with respect to volume fraction. Within the framework of Hybrid Mixture Theory and hence the Coleman and Noll technique of exploiting the...