منابع مشابه
Numerical investigation of upward air-water annular, slug and bubbly flow regimes
In this paper, numerical investigation of upward two phase flow of air-water has been studied. Different conditions of flow regimes including annular, wispy annular, slug, churn and bubbly are simulated based on Hewitt and Roberts map, and a good agreement between the experimental data of the map and the numerical simulation has been observed. Accordingly, a proper CFD model in CFD software of ...
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Using direct numerical simulation of the Navier–Stokes equations, we analyse the dynamics of the interface between air and water when the two phases are driven by opposite pressure gradients (countercurrent configuration). The Reynolds number (Reτ ), the Weber number (We) and the Froude number (Fr) fully describe the physical problem. We examine the problem of the transient growth of interface ...
متن کاملEffect of drag reducing polymer on air–water annular flow in an inclined pipe
Drag reduction (DR) for air and water flowing in an inclined 0.0127 m diameter pipe was investigated experimentally. The fluids had an annular configuration and the pipe is inclined upward. The injection of drag reducing polymer (DRP) solution produced drag reductions as high as 71% with concentration of 100 ppm in the pipeline. A maximum drag reduction that is accompanied (in most cases) by a ...
متن کاملVortex and Oil Distribution of Oil-Water Annular Flow through Ball Valve
The study on the flow behave inside of a ball valve is important for heavy crude oil transportation. Owe to the fast progress of the numerical technique, it becomes an effective way to observe the flows inside a valve and to analyze the flow structure of the oil-water core annular flow. In the present study, the simulation of the oil-water core annular flowing through the valve is conducted...
متن کاملKinetic modeling of xylan hydrolysis in co- and countercurrent liquid hot water flow-through pretreatments.
A kinetic model for xylan hydrolysis in liquid hot water flow-through pretreatment was developed. The model utilized a declining xylan hydrolysis rate constant with increasing conversion in combination with direct xylooligomer degradation. The model was able to describe experimental results from flow-through pretreatment of corn stover and triticale straw at various pretreatment temperatures, a...
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ژورنال
عنوان ژورنال: International Journal of Multiphase Flow
سال: 1983
ISSN: 0301-9322
DOI: 10.1016/0301-9322(83)90093-9