in this study, gas evolution in a vertical electrochemical cell is investigated numerically with a modified two-fluid model. the mathematical model involves solution of separate transport equation for the gas and liquid phases with an allowance to inter-phase transfer of mass and momentum. the governing equations are discreted via the finite volume technique and then are solved by the simple al...

coriolis mass flow meters are one of the most accurate tools to measure the mass flow in the industry. however, two-phase mode (gas-liquid) may cause severe operating difficulties as well as decreasing certitude in measurement. this paper presents a method based on fuzzy systems to correct the error and improve the reliability of these sensors in the presence of two-phase model fluid. definite ...

in many industrial equipment such as boilers and heat exchangers, the cylindrical tubes are exposed to the gas- liquid two phase flow. for any immersed body in flow field vortex shedding is created with a frequency that may be constant or variable, according to conditions such as flow rates, geometry of body, and etc. the failure will happen in the equipment, when this frequency is close to one...

in this research, the effect of surface roughness and bubble injection on skin friction and hydrodynamic drag force has been numerically considered. this research is based on taylor-couette flow. considered flow includes two concentric cylinders which internal cylinder is movable and external is immovable. the effective equations on the flow includes: equations of momentum, continuous, turbulen...

In order to elucidate the physical processes governing the evolution of material areas in complex flow, we study the shape dynamics of three-point Lagrangian clusters in an experimental quasi–two-dimensional flow. By comparing our measurements with simulations of triangles evolving purely diffusively, we show that the path taken by the mean triangle shape through a suitably defined phase space ...

Flow assessment is an integral part of the comprehensive evaluation of the cardiovascular system. Cardiovascular magnetic resonance is well suited for flow assessment due to its non-invasive, multi-plane imaging capability unrestricted by windows of access and its ability to measure blood flow and velocity. Phase-contrast velocity mapping for flow assessment has been incorporated in all commerc...

The current offshore oil & gas multi-phase production and transportation installations have big challenges related with the slugging flow: An unstable multi-phase flow regime where the flow rates, pressures and temperatures oscillate in the considered processes. Slug can be caused by different operating conditions and installation structures. The most severe slugs are often induced in long vert...

Employing XMM-Newton EPIC data we perform a detailed comparison between different spectral models to test whether the gas in cooling-flows is multi-phase or not. Our findings all point in the same direction, namely that gas in cooling-flows does not show the wide distribution of temperatures expected from standard multi-phase models. This result has profound implications for cooling-flow models...

A tactical ad hoc network is usually divided into several subnets by Code Division Multiple Access with frequency hopping sequences. In practice, the number of subnets needed in common tactical task is much lower than the theoretical networking capacity, which causes serious code resource waste. To make full use of idle code resources, we present a single-transceiver multi-channel routing proto...

Introduction: Cine or multi-phase cardiac imaging offers a variety of applications such as assessment of global cardiac function, measurement of the heart wall motion with phase contrast [1] or tagging techniques [2] as well as determination of flow inside the ventricular system. Here, we present two fast imaging methods for assessment of myocardial motion: Interleaved Echo Planar Imaging (EPI)...