As the gas volume fraction increases, the location of the peak maximum of the measured frequency spectrum responsive to the excitation increases in frequency, and the height of the peak maximum increases, thereby permitting a linear calibration curve to be obtained. A second method measures the ...
ACOUSTIC GAS VOLUME FRACTION MEASUREMENT IN A MULTIPHASE FLOWING LIQUIDA first method measures the response of a pipe containing oil excited by a linear acoustic frequency chirp in the tens of kilohertz range encompassing a resonant mode of the pipe. When the gas volume fraction increases the ...
In addition, with the rising oil and gas flowing along the wellbore, the pressure will gradually reduce, and the gas will be separated out and expand its volume. The elastic expansion energy of gas is also one of the energy sources of the natural flow. Of course, as time goes on, the...
Microfluidic gas-dynamic nozzle. The microfluidic device for generating free-flowing liquid sheets is shown in a. The gas and liquid ports are on the underside of the chip on the left. Microfluidic channels for gas (outer), and liquid (central) can be traced to the output of the nozzle on...
{2}for all physical parameters involved in the problem. It is found that those physical parameters like Porosity\varepsilon, Solid Volume Fraction\phi, and Darcy numberDawere to boosts the heat transfer rates evident through increasing average Nusselt numberNu_{avg}while the Hartmann numberHatends...
Comparisons are made with earlier work, and with the corresponding expression for the molecular diffusion flux of one component in a binary ideal gas mixture. The Brownian and molecular diffusion fluxes are found to be identical in form, with the Brownian particle volume fraction corresponding to ...
An original experimental set-up was developed and used for studying crystallization and rheology of methane hydrate/water/dodecane system under laminar flowing. Dynamic viscosity and conversion of water and gas into gas hydrate crystals were measured during the process for various water contents. Experim...
However, the position of the spectrum peaks does not appear to change appreciably with velocity or gas/oil ratio. The present invention is based, at least in part, on the discovery that the introduction of sand in the flow stream and subsequent changes in the volume fraction thereof have ...
In addition, the influences of hydrate particle size initial distribution type, hydrate volume fraction, flow rate and initial hydrate particle diameter were investigated. The conclusions in this work can provide guidance for the development of deep water flow assurance....
it will be noted that no hydrogen from an external source has been added to the fresh charge stock on a once-through basis. As will be recognized by those skilled in the art, there is afforded a significant capital savings as a result of eliminating the recycle gas compressor, in addition...