Mixing is a common process in food industry, and in particular it is interesting to develop optimal mixers in order maximize fluid mixing and minimize energy consumption by reducing the viscous dissipation effects. Although many studies and results had been presented in literature for both batch and static mixers (Rauline et al. 2000 and Mutsakis et al. 1986 for a review) the lack of a develope...

Injection of Newtonian fluids to displace pseudoplastic and dilatant fluids, governed by the power-law viscosity relationship, is common in many industrial processes. In these applications, changing displaced fluid through velocity alteration can regulate interfacial instabilities, displacement efficiency, thickness static wall layer, injected fluid’s tendency move toward particular parts chann...

Rhizobium tropici, a member of the Rhizobiaceae family, has the ability to synthesize and secrete extracellular polysaccharides (EPS). Rhizobial EPS have attracted much attention from the scientific and industrial communities. Rhizobial isolates and R. tropici mutants that produced higher levels of EPS than the wild-type strain SEMIA4080 were used in the present study. The results suggested a h...

The culture medium in many fermentations is a non-Newtonian fluid. In bacterial alginate batch production, the broth becomes more pseudoplastic as concentration increases, which impairs mixing process. This work characterizes effect of interaction between changing rheology and impeller on bioreactor fluid dynamics. Experimentally, fermentation with evolving reproduced. Three stages are mimicked...

The effects of milling energy (0.26–4.08 kJ/g) on starch structure, flow behavior and syneresis dispersions (4–8% w/v) were investigated. Crystallinity loss (XRD analysis) during could be mathematically related with the increase 1047 cm?1/1022 cm?1 FT-IR intensity ratio (Ri) it was also reflected by changes in shape surface roughness granules (SEM micrographs). Starch showed a Newtonian or pseu...

New experiments on the orientation of a cylinder settling in viscoelastic and pseudoplastic fluids are described in an attempt to identify the main mechanisms which control the orientation of the cylinder as it falls.

The effective modeling of fresh cementitious materials during setting is an active and challenging research topic. material behavior as well the parameters properties are not fully understood yet. Therefore, flow casting subject ongoing research. Previous works attempted to model cement paste a solid subjected yielding, or fluid modeled by Brinkman law power law, both in 2D 3D. Of existing mode...

Drilling mud is a necessary component of drilling operations. There have been notable attempts to enhance the filtration and rheological properties increase cutting carrying capacity water-based (WBM) using nanoparticles (NPs). This study investigates how varying Al2O3 concentrations affect fluids. In this study, different muds were produced bentonite (2.8g) without nanoparticle, 50% (1.4g) Al2...

Abstract The key for improving the mixing efficiency of pseudoplastic fluids is to enhance chaotic degree in flow field. xanthan gum solution was used study characteristics and performance a stirred tank with impeller perturbed six-bent-bladed turbine. Based on velocity time series collected by experiment particle image velocimetry (PIV), distributions largest Lyapunov exponent (LLE) Kolmogorov...

Most of the fluid used in industrial application (i.e. Oils and gas industry, food manufacturing, lubrication biomedical) do not conform to Newtonian postulate. In contrast fluid, viscosity can change when under force either more liquid or solid dependent on shear rate history. This behaviour fluids is commonly known as non-Newtonian fluid. The so widespread nature technology resulting very hig...