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The move clears a major hurdle for companies like ConocoPhillips and Dow Chemical that are seeking steady gas supplies.
A theoretical formulation is carried out of acoustic wave propagation in a narrow capillary tube with steady gas flow.
The drag reduction mechanism of this specially designed surface was attributed to an "effective" slip which was generated by the steady gas in the microgrooves underwater.
Consequently, the numerical simulation with computational fluid dynamics (CFD) is adopted to analyze the flow filed, jet angles, and steady gas flow forces for the servo valve with different valve openings and inlet pressures.
The results show that the flow curve of steady gas migration is non-linear at a low pressure gradient and then becomes linear with the increase of the squared pressure gradient.
Then the compensated approach is proposed to reduce the steady gas flow force for the servo valve, changing the angle of non-metering port designed in the valve sleeve to the spool axis.
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In this paper the effect of pulsating flow is investigated by means of a steady gas-stand that has been modified to produce engine-like pulsating flow.
In this work a new phenomenological pore scale hydrodynamic model is proposed to predict pressure drop and liquid holdup in uniform and steady gas-liquid flow in a trickle bed reactor.
The results show that under the quasi-steady gas phase assumption, the D2 law is recovered after an initial transient.
The time evolution of the system comes from alternating integrations of the quasi-steady gas phase and transient solid.
Due to time-scales in the problem, the model considers a quasi-steady gas phase with a transient solid.
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Justyna Jupowicz-Kozak
CEO of Professional Science Editing for Scientists @ prosciediting.com