The past few years have seen many advances in our understanding of the dynamics of polymeric fluids. These include improvements on the successful reptation theory; an emerging molecular theory of semiflexible chain dynamics; and an understanding of how to calculate and classify “phase diagrams” for flow-induced transitions. Experimentalists have begun mapping out the phase behavior of wormlike ...

We investigate the effect of surface waves generated by the Faraday instability on a shear-thickening surfactant solution under vertical vibrations. We show that a prolonged oscillation of the surface above the instability onset leads to an increase of the fluid viscosity. This phenomenon is evidenced by comparing the time needed for the instability to develop in the fluid at rest and once the ...

Structural changes of complex fluids under steady shear flow were investigated for different type of materials, such as suspensions, associating polymers and polymer solutions [1, 2, 3, 4, 5, 6]. Under specific conditions, depending on the material, a shear-thickening regime is observed followed by shear-thinning behaviour [3, 4, 6]. Shear-thickening is often the result of shear-induced formati...

We propose a nonsmooth continuum mechanical model for discontinuous shear thickening flow. The model obeys a formulation as energy minimization problem and its solution satisfies a Stokes type system with a nonsmooth constitute relation. Solutions have a free boundary at which the behavior of the fluid changes. We present Sobolev as well as Hölder regularity results and study the limit of the m...

Non-Newtonian fluid flows, especially in three dimensions (3D), arise numerous settings of interest to physics. Prior studies using the lattice Boltzmann method (LBM) such flows have so far been limited mainly two and used less robust collision models. In this paper, we develop a new 3D cascaded LBM based on central moments multiple relaxation times (MRT) three-dimensional, nineteen velocity (D...

In this work, the critical parameters for an incompressible flow of non-Newtonian shear-thickening power-law fluids across a channel confined circular cylinder have been investigated numerically. The governing equations solved by using finite volume method wide range (1?n?1.8) and two values wall blockage ratio (?=2 4). present methodology has extensively validated with numerical experimental r...

flow characteristics and rheological parameters of “malas yazdi” pomegranate (punica granatum l.) juice were investigated using rotational viscometer at different temperatures (10, 20, 30, 40, 50, 60 and 70ºc) and concentrations (12, 22, 32, 42 and 52º brix). the experimental data had the best fitness with herschel-bulkley model and the values of flow behavior index (n) varied between 0.97 and ...

This study focused on the determination of quality characteristics homemade organic vinegars (apple, red hawthorn and yellow hawthorn) which were produced with double fermentation (ethyl alcohol acetic acid fermentation) method by spectroscopy (UV/Fourier transform infrared) rheology technique. These absorbance peak values are associated acids phenolic compounds determined as an important param...