Abstract Meso-scale turbulence was originally observed experimentally in various suspensions of swimming bacteria, as well the collective motion active colloids. The corresponding large scale dynamical patterns were reproduced a simple model polar fluid, assuming constant density particles. Recent, more detailed studies variety experimental realizations fluids revealed additional interesting as...

Study and research around heat conduction mechanisms of nanofluids suspensions are active for a decade. Several models effective thermal conductivity have been published. This review summarizes recent solid/liquid suspension unfolds the effects interfacial layers, shells, aggregate structure on this property. Basically, experimental, numerical, both, ways to determine summarized here in respect...

Fluid microstructure nature has a direct effect on turbulence enhancement or attenuation. Certain classes of fluids, such as polymers, tend to reduce intensity, while others, like dense suspensions, present the opposite results. In this article, we take into consideration micropolar class fluids and investigate intensity modulation for three different Reynolds numbers, well volume fractions den...

Particle suspensions in non-Newtonian liquid matrices are frequently encountered nature and industrial applications. We here study the Taylor–Couette flow (TCF) of semidilute spherical particle (volume fraction $\leq 0.1$ ) viscoelastic, constant-viscosity liquids (Boger fluids). describe influence load on various transitions TCF such fluids, these transitions. addition is found to delay onset ...

the continuous development of global economy with decreasing in available hydrocarbon sources and increasing discovery and extraction costs due to decrease in-situ oil and gas reservoir, displays the necessity of using new techniques for the improve rate of penetration and productivity in well. nanotechnology has already contributed significantly to technological advances in the energy industri...

Materials such as foams, concentrated emulsions, dense suspensions or colloidal gels, are yield stress fluids. Their steady flow behavior, characterized by standard rheometric techniques, is usually modeled by a Herschel-Bulkley law. The emergence of techniques that allow the measurement of their local flow properties (velocity and volume fraction fields) has led to observe new complex behavior...

Macroscopic phenomena can couple together with microscopic events creating complex feedback dynamics. When the changes in the microscale involved by macroscopic behavior : 1. can be modeled by downscaling of the macroscopic models, 2. follow assumed constitutive relations, 3. do not violate the assumptions of mass, momenta and energy continuity, then the continuum model can be regarded as a cro...

The continuous development of global economy with decreasing in available hydrocarbon sources and increasing discovery and extraction costs due to decrease in-situ oil and gas reservoir, displays the necessity of using new techniques for the improve rate of penetration and productivity in well. Nanotechnology has already contributed significantly to technological advances in the energy industri...

In the present work, we investigated the scattering and spectrally resolved absorption properties of nanofluids consisting in aqueous and glycol suspensions of single-wall carbon nanohorns. The characteristics of these nanofluids were evaluated in view of their use as sunlight absorber fluids in a solar device. The observed nanoparticle-induced differences in optical properties appeared promisi...

Investigations of nontuberculous mycobacterium (NTM) infections associated with various environmental sources have been hampered by the lack of adequate techniques for selective isolation of these organisms from environmental fluids. This study compared chemical dosing techniques for recovery of NTM from water samples collected from 115 randomly selected dialysis centers. Cell suspensions of NT...