Granular pipe flows are characterized by intermittent behavior and large, potentially destructive solid fraction variations in the transport direction. By means of particle-based numerical simulations of gravity-driven flows in vertical pipes, we show that it is possible to obtain steady material transport by adding a helical texture to the inner-wall of the pipe. The helical texture leads to a...

Ionic liquid based aqueous biphasic systems (IL-ABS) were formed by the addition in water of a hydrophilic ionic (1-Butyl-3-methylimidazolium Chloride, C4mimCl) and kosmotropic salt (tripotassium phosphate, K3PO4). The flow patterns IL-ABS studied capillary channels with 0.2, 0.5 0.8 mm internal diameter; this is first time such two-phase flows have been investigated. Three weight concentration...

Bubble formation inside a microscale channel is a significant problem in general microfluidic experiments. The problem becomes especially crucial when performing a polymerase chain reaction (PCR) on a chip which is subject to repetitive temperature changes. In this paper, we propose a bubble-free sample injection scheme applicable for continuous-flow PCR inside a glass/PDMS hybrid microfluidic ...

We report a simple technique to separate plasma from blood in a flowing immiscible plug. We investigate the effect of various control parameters such as blood dilution, injection flow rate, observation time and fluid properties on plasma separation. We find that the technique works best for diluted blood samples at low plug velocities and long observation times. We postulate that the main mecha...

We present various Lattice Boltzmann Models which reproduce the effects of rough walls, shear thinning and granular flow. We examine the boundary layers generated by the roughness of the walls. Shear thinning produces plug flow with a sharp density contrast at the boundaries. Density waves are spontaneously generated when the viscosity has a nonlinear dependence on density which characterizes g...

Flow Reactors In article number 2201845, Shinae Jun, Milad Abolhasani, and co-workers present a modular flow chemistry strategy for intensified multi-stage manufacturing of metal-free quantum dots (QDs). The plug-and-play platform enables one order magnitude faster InP QD synthesis times than batch reactors by utilizing tunable time- temperature-to-distance transformation in flow.

A non-Newtonian mathematical model of blood described as a Hershel-Bulkley fluid flowing in stenosed artery with the effect chemical reaction is mathematically studied. The expressions shear stress, mean velocity and absolute plug non-plug flow field are evaluated analytically. convective-diffusion equation solved using Taylor-Aris technique subject to relevant boundary constraint determining c...

Wall-flow filters are a standard component in exhaust gas aftertreatment and have become indispensable vehicles. Ash soot particles generated during engine combustion deposited diesel or gasoline particulate filters. During regeneration, the oxidized. The remaining ash can form different deposition patterns: homogenous layer plug-end filling. It has not yet been clarified whether filling is fir...