A sequential injection system with dual analytical line was developed and applied in the comparison of two different detection systems viz; a conventional spectrophotometer with a commercial flow cell, and a multi-reflective flow cell coupled with a photometric detector under the same experimental conditions. The study was based on the spectrophotometric determination of phosphate using the mol...

Dense oceanic overflows mix with surrounding waters along the descent down the continental slope. The existing parameterizations for entrainment in dense currents account primarily for the shear-induced entrainment at the interface between the dense flow and the ambient fluid. However, the turbulence generated by roughness elements at the bottom boundary, which produces an enhanced drag, can be...

Nucleation rate measurements of water in the presence of nitrogen as a carrier gas are reported at total pressures near 10, 25, and 40 bar, and temperatures of 230 and 250 K. The results were obtained using our pulse-expansion wave tube, particularly suited for high pressure nucleation research. Enhanced fugacity of water vapor in the mixture, due to the presence of nitrogen, was quantitatively...

In today’s society, with the continuous growth of energy demand, Bohai Oilfield, as an important offshore oil resource base in China, is facing increasingly severe challenges while contributing to national security. order improve quality water injection oilfield and gradually achieve efficient stable production, Oilfield has launched a well pressure optimization project, focusing on improving e...

After two bid rounds of oilfields, moo has planned a plateau oil production 12mmbblsd in 2017. order to reach the production, most oilfields require water injection maintain reservoirs‟ pressure. there are three main challenges injection. firstly, where could urgent resource be available rehabilitation phase brown oilfields? secondly, how high amount produced handled at late stage thirdly, what...

The effect of variable water injection timing on performance and emission characteristics of hydrogen fueled compression ignition (HFCI) engine has been investigated and the results are presented in this paper. In this study, water is injected from 20 BTDC to 20 ATDC with injection duration of 20 CA and 40 CA. Hydrogen is injected at the intake port with fixed injection timing from 0 CA to 40 C...

As a new manufacturing process, abrasive water jet (AWJ)cutting has been very effective for difficult-to-machine materials. From the point of view of jet generation, abrasive water jets can be categorized as injection jeti or suspension jets. Injection jets are the most commonly used type for practical applications. An injection AWJ is formed by accelerating small abrasive particles through con...

In 1921, Brunn showed that injection of neurohypophysial extracts causes a temporary increase in the body water content of Amphibia kept in water. Since then the existence of this water-balance effect has been confirmed by numerous workers, but its mechanism is by no means fully understood. The increase in body water following pituitrin injection might be due either to an increased rate of wate...