Achieving rapid mixing of different liquids in a short distance is important various biochemical applications. Herein, novel planar mixer with staggered Z-shaped baffles proposed. Numerical investigations are carried out to evaluate its ability based on quality and pressure drop when the Reynolds number (Re) varies from 0.1 50. The Lyapunov exponent, Poincaré map, vortex visualization conducted comprehensively analyze chaotic state mechanism. Results show that proposed exceeds 0.9 efficiency...

With the development of in vitro diagnostics, extracting submicron scale particles from mixed body fluids samples is crucial. In recent years, microfluidic separation has attracted much attention due to its high efficiency, label-free, and inexpensive nature. Among microfluidic-based separation, based on ultrasonic standing waves gradually become a powerful tool. A microfluid environment containing tilted-angle surface acoustic wave (taSSAW) field been widely adapted designed separate for...

A fast mixing is critical for subsequent practical development of microfluidic devices, which are often used assays in the detection reagents and samples. The present work sets up computational fluid dynamics simulations to explore flow characteristic mechanism fluids cross-shaped mixers within laminar regime. First, effects increasing an operating parameter on local quality along microchannels investigated. It found that sufficient diffusion cannot occur even though concentration gradient...

Efficient and rapid particle enrichment at the submicron scale is essential for research in biomedicine biochemistry. Here, we demonstrate an acoustofluidic method within a spinning droplet driven by unidirectional transducer. The transducer generates intense sound energy with relatively low attenuation. Droplets placed offset wave propagation path on polydimethylsiloxane film undergo strong pressure gradients, deforming into ellipsoid shape high speed. Benefitting from drag force induced...

Acoustic manipulation of microparticles and cells has attracted growing interest in biomedical applications. In particular, the use acoustic waves to concentrate particles plays an important role enhancing detection process by biosensors. Here, we demonstrated microparticle concentration within sessile droplets placed on hydrophobic surface using flexural wave. The design benefits from streaming flow induced Lamb wave propagated glass waveguide manipulate droplets. Microparticles will be...

Abstract The mechanics of bile flow in the biliary system plays an important role studying stasis and gallstone formation. Bile duct stricture is abnormal phenomenon that refers to getting smaller or narrower. main objective this study influence on dynamics using numerical methods. We employed a Computational Fluid Dynamics model within strictured hepatic duct. studied compared severity, length, eccentricity, property dynamics. velocity, pressure distribution, drop, wall shear stress are...

During the daily operation of high-speed railways, unexpected events such as geological disasters or equipment failure may lead to railway segment blockages. A long-duration blockage usually leads large-scale train delays, which cause significant inconvenience passengers.Adjusting schedules in real time during blockages is an important issue for dispatch and railways.For a known interval, mixed integer nonlinear programming (MINLP) model speed adjustment diagram constructed.In this model,...

Coal is the most economical fossil energy source in world, and automatically drill pipe delivery of rig can greatly reduce labour intensity workers. In this paper, we present a 2D vision sensor-based method for locating on horizontal directional drilling rig, which achieved by location arm position identification six-degree-of-freedom robot underground coal mines. The positions it are realized monocular based cooperative targets, effectively determine posture positioning precisely guide to...

In this paper, we analyze the characteristics of high-speed railway networks in presence emergencies from a complex network theory's perspective. First, represent by graph where nodes denote stations and edges train flows. For system, punctuality trains number running through are two main factors for evaluating emergency-induced effects. We thus assign each edge weight which is determined these key quantities. Then propose method to estimate delay some metrics introduced properties under...