Micro-scaled Coiled Flow Inverter (MCFI) is a scaled down version of a Coiled Flow Inverter (CFI) which utilizes the principle of flow inversion for process intensification. MCFI is constructed with tubing less than 1.0mm. The microfluidic nature of MCFI caused by low Reynolds number (Re) laminar flow posed as a challenge to achieve effective mixing. Simulation was implemented with Computationa...

INTRODUCTION Several major changes in sap collection equipment and methods have occurred over the past 10-15 years. The introduction of small spouts, a transition in composition from polyvinyl chloride (PVC) tubing to polyethylene (PE) tubing, and improvements in fittings have occurred. These changes, along with continued modifications in tubing system design, installation, and maintenance as w...

Pulsations generated by personal sampling pumps modulate the airflow through the sampling trains, thereby varying sampling efficiencies, and possibly invalidating collection or monitoring. The purpose of this study was to characterize pulsations generated by personal sampling pumps relative to a nominal flow rate at the inlet of different respirable cyclones. Experiments were conducted using a ...

Gas-lifted oil wells are susceptible to failure through malfunction of gas lift valve assemblies (GLV). One failure mode occurs when the GLV check valve fails and product passes into the well annulus, potentially reaching the wellhead. This is a growing concern as offshore wells are drilled thousands of meters below the ocean floor in extreme temperature and pressure conditions, and repair and ...

Abstract Acid fracturing is an effective technology for increasing oil and gas production. However, the acid will cause serious corrosion to tubing. In this paper, inhibition performance of TG202 inhibitor acidizing high temperature high-pressure wells on N80 carbon steel 13Cr martensitic stainless-steel tubing in 15% hydrochloric was studied by electrochemical noise technology. The results sho...

BACKGROUND A valveless pump generates a unidirectional net flow of fluid around a closed loop of soft viscoelastic tubing that is rhythmically compressed at one point. The tubing must have at least two sections with two different stiffnesses. When a short segment of the tube is squeezed asymmetrically at certain frequencies, net flow of fluid around the loop can occur without valves. METHODS ...

BACKGROUND A new device for sterile docking, the Compodock (Fresenius NPBI Transfusion Technology), was developed for connecting PVC tubing for medical use while maintaining sterility. STUDY DESIGN AND METHODS Sterility of the connections was assessed by welding tubing with a heavy exterior contamination with Bacillus subtilis spores and also by welding in an environment contaminated with aer...

Phthalates leached from plastic tubing or other plastic devices may interfere with gas-chromatographic determination of long-chain fatty acids in plasma. In the case of hospitalized patients who have received infusions or had blood drawn through plastic tubing, gas chromatography/mass spectrometry may be required for accurate determination of such fatty acids.

The creation of new technological equipment for the implementation of highly efficient methods for recovering viscous oil from deep oil-bearing beds is a challenging scientific and engineering objective. To this end, a series of theoretical and experimental studies for designing tubing with the application of the developed basaltand glass-fiber-based composite heatinsulating coatings has been c...

The objective of this research work is to propose a phase diagram that can be used find proper operating condition for generating droplets different types. It found the QR versus CaD effectively classify droplet generation into three vivid regimes: dripping, jetting and tubing. For dripping regime, its in range either < 10−4 50 or 10−3 1. 1.35 × 10−2 > 100 tubing