The rapid growth of Internet Things (IoTs) applications in various sectors has led to a significant increase the number IoT devices. This deployment numerous protocols provide greater connectivity. However, this extensive adoption also left them vulnerable attack. In particular, attacks targeting wireless communication capabilities represent threat. Such exploit vulnerabilities connectivity unit, compromising its security. To counter threat, paper proposes Host Intrusion Detection System...

A new Galerkin finite element method for the solution of Navier–Stokes equations in enclosures containing internal parts which may be moving is presented. Dubbed virtual method, it based upon optimization techniques and belongs to class fictitious domain methods. Only one volumetric mesh representing enclosure without its needs generated. These are rather discretized using control points on kinematic constraints enforced introduced into mathematical formulation by means Lagrange multipliers....

A new image analysis technique is proposed to determine the macromixing time in a transparent stirred tank. It consists of capturing on video decolorization process by using fast acid−base indicator reaction and employing quantify color evolution. The change quantified means individual thresholds RGB model provides direct measurement evolution as it can be seen an operator front vessel. shown that this removes subjectivity estimation naked eye, has high degree reliability repeatability,...

The power consumption of a coaxial mixer consisting wall-scraping anchor and different dispersion impellers (radial discharge) operating in co- counterrotating modes has been experimentally characterized the case viscous Newtonian non-Newtonian fluids. It was found that speed did not affect turbines. to increase when were used mode decrease they corotating mode. Following Metzner Otto approach [AIChE J. 1957, 3 (1), 3−10], new correlations based on impeller geometry for generalized Reynolds...

Abstract The performance of six static mixer (Kenics, Inliner, LPD, Cleveland, SMX and ISG) are compared using 3D numerical simulations in laminar creeping flow regime. Numerical pressure drop results tested against experimental ones, showing overall a good agreement. Besides drop, four criteria (extensional efficiency, stretching, mean shear rate intensity segregation) chosen to compare the mixers. It appears that Kenics, LPD Cleveland mixers rather similar. ISG seems better than this first...

ABSTRACT: The effect of pH on the non‐Newtonian viscosity (η)of aqueous Carbopol 940 solutions is presented with high resolution (pH increments about 0.4) between = 2.8 and 12.7. Aqueous NaOH was used to adjust 1.48 wt % solutions. A Contraves viscometer measure steady‐flow shear stress at known rate (γ) over range γ= 8 195 s −1 . Yield stresses shear‐thinning η(γ) were observed. Data fitted a Herschel‐Bulkley model, whose parameters (including yield stress) expressed as functions pH....

Mixing time experiments were performed using a coaxial mixing system consisting of an anchor impeller and three different types impellers, namely Rushton turbine, Rayneri−Sevin impeller, new hybrid dispersing impeller. Both co- counterrotating modes investigated with Newtonian shear-thinning fluids. It was found that times significantly reduced in corotating mode compared to the or only rotating at same power per unit volume transition regimes. Among various turbine impellers considered, be...

Abstract The performance of several combinations a wall scraping impeller and dispersing impellers in coaxial mixer operated counter‐ co‐rotating mode were assessed with Newtonian non‐Newtonian fluids. Using the power consumption mixing time as efficiency criteria, found to be better choice for hybrid impeller‐anchor combination was most efficient counter‐rotating or regardless fluid rheology. For both rotating modes, it shown that anchor speed does not have any effect on draw turbines....

Abstract The mixing performance of the KMX and SMX static mixers have been compared using 3D high‐resolution computational fluid dynamics (CFD) simulations. Although these a similar design composed layers blades, their blade shape is different: curved for flat SMX. flow Newtonian in steady laminar regime has considered as benchmark study. simulation was first validated by assessing pressure drop vs. number mixer elements results were found to be good agreement with experimental data. To...

Abstract A finite element simulation of the dip coating process based on a discretization continuum with discontinuous pressure elements is presented. The algorithm computes flow field from natural boundary conditions while an extra condition provided by existence free surface employed to displace meniscus location towards actual position. iterative and uses pseudo‐time stepping technique coupled cubic spline fitting surface. Numerical predictions exhibit good agreement experimental data for...