Finite reservoir effect on capillary flow of microbead suspension in rectangular microchannels

Electro-Mechanical Properties of Multilayer Graphene-Based Polymeric Composite Obtained through a Capillary Rise Method

“…The resistance from gravity increases significantly with further liquid rise, while the driving capillary force (defined as the pressure difference between the inlet of microchannel and the flow front) remains relatively constant. Consequently, $H$ approaches asymptotically an equilibrium value (i.e., the maximum rise height $H_{\max }$), corresponding to the balance between capillary and gravity forces [31]. The addition of MLG to the resin, even at the low concentration of 1 wt %, produces an increase of the viscosity of the mixture, and consequently, the capillary rise of the composite mixture becomes slower [32].…”

“…A MLG-composite lamina is obtained via spontaneous capillary-driven filling (SCDF) of microchannels with an MLG-polymer mixture at 1 wt % of MLG. The SCDF of microchannels has been widely studied for different applications, such as ink-jet printing, lab-on-chip and underfilling of a flip chip [29,30,31,32], but to the best of our knowledge, it has never been applied to produce a strain sensor with a highly reliable response. The aim of this work is to take advantage of the SCDF method in order to achieve maximum stability of the sensor response under loading/unloading conditions and monotonic increasing load.…”

Nanoscale surface modifications to control capillary flow characteristics in PMMA microfluidic devices

“…In a recent report, Waghmare and Mitra [46,47] derived the pressure field distribution in the capillary meniscus at the entrance of a rectangular microchannel considering semi-cylindrical control volume. In another recent report, Waghmare and Mitra [46,47] investigated the numerical solutions of flow front penetration in vertically oriented rectangular microfluidic channels considering finite reservoir at the inlet to study the effect of gravity along with capillarity.…”

Particle transport in patterned cylindrical microchannels

“…Lab-on-chip (LOC) systems (Felten et al 2008), flow of biomolecules in microchannels and microcapillaries (Waghmare and Mitra 2010a), porous media flows (Sbai and Azaroual 2011), chromatographic analysis (Bernate and Drazer 2011), and membrane separations (Das et al 2003;Bacchin et al 2011) are some of the examples of such systems in which particle transport in micro and nanochannels is ubiquitous. In most cases, the walls of these microchannels are physically and chemically heterogeneous which are either naturally occurring in these systems (Zhu et al 2008) or might be induced due to fabrication procedures (Rawool et al 2006).…”

“…Since then, fundamental concepts of particle transport has been used in various microfluidic applications. Waghmare and Mitra (2010a) discussed the transport of microbead suspension in rectangular capillaries. In a recent article by Fridjonsson et al (2011), NMR microscopy and CFD simulations were used to investigate transport of fluids with colloidal suspensions in a bifurcated capillary system.…”