Mixing of reagents in microfluidics is critical, and currently, the focus on Newtonian fluids, but these are often viscoelastic fluids. In this study, a micromixer containing conductive cylinder proposed based principle induced charge electro-osmosis (ICEO). The Oldroyd-B constitutive model was chosen to characterize flow properties Poisson–Boltzmann used describe ion distribution electrolyte. impact elasticity number (El) fluids mixing efficiency, velocity, vortex studied. results show that...

Micromixers have important applications in lab-on-a-chip, biomanufacturing, and chemical engineering. In this study, a micromixer with conductive barrier plate based on the induced charge electro-osmosis is proposed. The Oldroyd-B constitutive model was chosen to characterize flow characteristics of viscoelastic fluids, Poisson–Boltzmann used electrokinetic properties. effects installation plate, concentration polymer, shape mixing were studied finite volume method. efficiency fluids 78.3%...

We investigated the phenomenon of induced charge electro-osmotic flow (ICEOF) driven by a cylindrical electrode in container, focusing on characteristics under different electric field conditions. Through analytical derivation, we provided approximate expressions for zeta potential and slip velocity around surface direct current rotating fields (ROT), as well presence an alternating effect transistor. The study primarily analyzes distribution influence ROT field, validity derived formulas...

Rapid detection of crop grain components is crucial for effective production and energy conversion. We used the sample set division method to divide multiple sets optimize NIRS models rapid prediction protein fat content. 1243 415 samples were screened divided into 5 4 sets, respectively. The aim was establish content prediction. best modeling methods N (Norris Derivative)+D (detrending)-C (CARS)-P (PLS) N+M (MC-UVE)-C-P, while those N+M-C-P N+S (Savitzky-Golay)-C-P. SS (Soybean Set), KS...

The exploration of ion transport properties in nanochannels with non-uniform surface charge density is imperative to enhance comprehension the ionic current rectification phenomenon and broaden implementation effect. However, majority research this domain confined Newtonian fluids. In study, Poisson–Nernst–Planck equation employed address electro-osmotic flow power-law fluids a nanochannel. impact charging conditions nanochannel wall fluid on concentration, current, velocity investigated...

Enhancing the micro-channel flow mixing is always a difficult problem. In this study, micromixer based on induced charge electro-osmosis proposed. A T-shaped micromixer, which has chamber with conductive surfaces in channel, chosen. Due to electro-osmotic effect of charge, potential generated surface. The Oldroyd-B constitutive model chosen characterize characteristics polyacrylamide solution, and an open-source solver named rheoTool finite-volume method used. shape, size, edge numbers...

A novel structure combining the application of control rods and forced rotation on a cylinder is proposed based cylindrical vibration suppression, combined numerically simulated at low Reynolds number 200, an attack angle 0°–105°, rate 0−1. The vortex-induced responses, fluid forces, wake evolution are analyzed, VIV suppression compared discussed. results show that merging vortex layers promotes shedding, causing high amplitude response. vibrates for no layer merging. Rotation causes...

Numerical simulations are carried out to investigate the vortex-induced vibrations of a two-degree-of-freedom (2DOF) near-wall rotating cylinder. Considering effects gap ratio, reduced velocity and rotational rate, amplitude response, wake variations fluid forces analyzed, with Reynolds number 200 mass ratio set 1.6. The correlative mechanism in wake–hydrodynamics–vibration is revealed. results show that influence wall dominates vibration effect on weakens as increases, negligible when H/D...

The study of the complex rheological properties viscoelastic fluids in nanochannels will facilitate application nanofluidics biomedical and other fields. However, flow has significant instabilities, numerical simulation failures are prone to occur at high Weissenberg numbers (Wi). In this study, simplified Phan-Thien-Tanner fluid model is solved using log-conformation tensor approach, effects parameters fluid, such as number (Wi), extensibility parameter (ε), viscosity ratio (β), on...

In many research works, the fluid medium in electroosmosis is considered to be a Newtonian fluid, while polymer solutions and biological fluids used biomedical fields mostly belong non-Newtonian category. Based on finite volume method (FVM), electroosmotic flow (EOF) of viscoelastic near-neutral (pH = 7.5) solution considering four ions (K+, Cl−, H+, OH−) numerically studied, as well fluids’ characteristics microchannel described by Linear Phan-Thien–Tanner (LPTT) constitutive model under...

The problem of water shortage needs to be solved urgently. membrane-embedded microchannel structure based on the ion concentration polarization (ICP) desalination effect is a potential portable device with low energy consumption and high efficiency. electroosmotic flow in cation exchange membrane system are numerically analyzed. results show that when horizontal electric field intensity 2 kV/m transmembrane voltage 400 mV, desalting efficiency reaches 97.3%. When strength increases 20 kV/m,...

In order to improve the heat transfer performance of microchannel exchanger, a composite enhancement method was proposed. Viscoelastic fluid used as working in pulsating flow condition, and rib plates were added bring extra disturbance flow. The Oldroyd-B constitutive model viscoelastic numerical simulation, field, temperature Nusselt number (Nu), pressure drop analyzed when average Reynolds (Re) is 10. Both Strouhal (St) amplitude are important factors affecting transfer, but they have an...

In a non-uniform electric field, the surface charge of deformable particle is polarized, resulting in dielectrophoretic force acting on particle, which causes electrophoresis. Due to force, two particles approach each other, and distort flow field between them, cause hydrodynamic correspondingly. The dielectrophoresis (DEP) together form net particles. this paper, based thin double layer (EDL) assumption, we developed mathematical model under arbitrary Lagrangian⁻Eulerian (ALE) numerical...

This paper uses the reduced dimension Otsu fast threshold segmentation algorithm to deal with concrete sand and stone images. The total area of pore is calculated by difference grey value, then porosity obtained which can be used find cement ratio demanded in mixing process. Compared traditional two dimensional algorithm, this decomposes into one-dimensional algorithms integrates within between clusters variance construct a new discriminant function. With dimensions reduced, speed effect...