Abstract. In this paper, a Cascaded Lattice Boltzmann Method with second order slip boundary conditions is developed to study gas flows in a microchannel in the slip and transition flow regimes with a wide range of Knudsen numbers. For the first time the effect of wall confinement is considered on the effective mean free path of the gas molecules using a function with nonconstant Bosanquet para...

Oily wastewaters from oil refineries and oil distribution centers are one of the most important environmental concerns in recent decades; therefore, it is critical to treat these types of wastewaters. In this study, the performance of different polyethersulfone hollow fiber membranes in oily wastewaters treatment was investigated and the effects of operating conditions such as transmembrane pre...

      Hard gelatin capsule filled with acetaminophen, osmotic agent (sorbitol), a release promoter (sodium dodecyl sulfate), coated with a semipermeable cellulose acetate membrane containing a hydrophobic plasticizer (castor oil) and sealed with white bees wax plug was designed. When placed in the sink water penetrates the membrane, dissolves the osmotic agent and increases the osmotic pressure...

The first normally-closed Parylene valve operating on electrothermal principles for rapid and wireless drug delivery was designed, fabricated, modeled, and tested. This valve is a key component of an implantable microbolus infusion pump (MIP) for neuroimaging in freely-moving untethered animals. This low-power, lightweight MEMS valve enables an MIP suitable for studying functional brain activat...

Pressure-driven actuators play a critical role in many microfluidic technologies, but the ancillary equipment needed to operate pneumatic and hydraulic platforms has limited their portability. To address this issue, we created an electrostatic microvalve used to regulate pressures in hydraulic control lines. In turn, these control lines are able to actuate pressure-driven components, e.g., micr...

hard gelatin capsule filled with acetaminophen, osmotic agent (sorbitol), a release promoter (sodium dodecyl sulfate), coated with a semipermeable cellulose acetate membrane containing a hydrophobic plasticizer (castor oil) and sealed with white bees wax plug was designed. when placed in the sink water penetrates the membrane, dissolves the osmotic agent and increases the osmotic pressure insid...

In this work, the effects of permeate pressure and feed flow rate on the performance of a composite polyvinyl alcohol (PVA) membrane in the removal of benzene from gasoline by pervaporation (PV) were evaluated. The results indicate the remarkable effect of permeate pressure on membrane performance as reducing permeate pressure (higher vacuum) from 30 to 3 mmHg causes the total flux to increase ...

A pneumatic soft robot can be made autonomous by carrying a liquid chemical fuel. In the existing design, to transmit fuel, pressure of fuel tank must exceed that actuator. Consequently, sufficiently stiff, which hardens robot. Herein, inspired pit membranes in trees, pump is developed, consisting nanoporous membrane between and actuator, coated with catalyst on side The migrates across and, me...

the effects of three levels of transmembrane pressure (1.0, 1.5 and 2.0 mpa) as well as three temperature  levels of: 30, 40 and 50°c on the efficiency of nanofiltration process of waste brine from the regeneration of ion exchange resins at sugar industry (to recover water and sodium chloride) were investigated throughout the current study. the polyamide tubular afc40 membrane manufactured by p...