As an important working condition in water conveyance projects, the filling process of pipelines is a complex hydraulic transition involving water–air two-phase flow with sharp pressure changes that can easily cause pipeline damage. In light during filling, this study explores right-angle elbow using CFD numerical simulations and physical model experiments, analyzing phase volume fraction, wate...

The paper presents the improvements of the mathematical model of liquid flow dynamics in long distance pipelines. The model was formulated on the basis of the real pipeline system as a result of research concerning the leak detection and localization algorithms. The model takes into account the liquid pressure and velocity in the pipeline, but also the impact of the others important system elem...

The heat transfer equation of oil, pipe wall and soil, combining with the boundary condition, connection condition and initial conditions to be the differential equations which can simulate the temperature drop rule of hot oil pipeline. Then the numerical solution method is used to solve, constructed difference equations. By the gauss elimination method, the temperature changing rule of hot oil...

With the exploitation of offshore oil and gas gradually moving to deep water, higher temperature differences and pressure differences are applied to the pipeline system, making the global buckling of the pipeline more serious. For unburied deep-water pipelines, the lateral buckling is the major buckling form. The initial imperfections widely exist in the pipeline system due to manufacture defec...

In our daily life, accident would happen with arterial haemorrhage, and death would be brought out by continuous arterial bleeding for little time if emergency has not been implemented in time. This paper presents a humerus arterial bleeding simulation model (HABSM) for hemostasia, which has a high-fidelity, practical model for the humerus arterial hemostasia operation that is not only for the ...

The proliferation of portable electronic devices with high data-rate wireless communication capabilities and the increasing emphasis on energy efficiency is continuously applying pressure on the performance and power consumption of ADCs and other mixed-signal systems. Power scalable designs enable an ADC core to be reusable under different input and sampling frequency conditions improving syste...

Sir Humphry Davy witnessed the first chlorine hydrate crystallizing in 1811. Couple of century later his discovery, natural gas hydrates has begun to play an important role in energy business. From being a mere chemical curiosity, they have proven to be a nuisance for the natural gas industry. The problem of hydrate induced blockage in “wet gas” flow systems has been widely reported and became ...