When Venturi meters are used in wet gas, the measured differential pressure is higher than it would be in gas phases flowing alone. This phenomenon is called over-reading. Eight famous over-reading correlations have been studied by many researchers under lowand high-pressure conditions, the conclusion is separated flow model and homogeneous flow model performing well both under high and low pre...

Blending a fraction of hydrogen into the natural gas pipeline or urban pipe network is an efficient approach for delivery. In this paper, mathematical model Hydrogen-Blended Natural Gas (HBNG) transportation established, and influences blending on hydraulic thermal characteristics are numerically investigated. The impact ratio performance centrifugal compressor operating point joint operation d...

brass ferrules have been used as packing in a laboratory- scale glass distillation column approaching pilot plant size because of their availability in all sizes and low cost. the available size range is such that these ferrules could also be used in industry and the results of this study could be scaled up. the performance of the new packing has been compared with the performance of glass pack...

in the present study, computational fluid dynamics (cfd) techniques and artificial neural networks (ann) are used to predict the pressure drop value (δp ) of al2o3-water nanofluid in flat tubes. δp  is predicted taking into account five input variables: tube flattening (h), inlet volumetric flow rate (qi  ), wall heat flux (qnw  ), nanoparticle volume fraction (φ) and nanoparticle diameter (dp ...

the harvested walnut has a relatively high moisture content of 30% compared with the safe storage moisture content of 8%. one of the common means of reducing the moisture content is by drying. for design of drying and other aeration systems for agricultural products including walnuts, the relationship between the drop in pressure and airflow velocity must be known. an airflow resistance app...

An experimental silicone hollow fiber membrane oxygenator for long-term extracorporeal membrane oxygenation (ECMO) was developed in our laboratory using an ultrathin silicone hollow fiber. However, the marginal gas transfer performances and a high-pressure drop in some cases were demonstrated in the initial models. In order to improve performance the following features were incorporated in the ...

The gas pressure in the main network of transmission lines is about 700 to 1000 psi (4826.33 6894.76 kPa), which reduced 250 (1723.69 kPa) at entrance station a city. This reduction process, occurs regulator, causes severe drop temperature. temperature produces hydrates and even water vapor freeze. As result, there possibility that passage regulator blocked flow cut off. By employing heaters (i...

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The corona splash due to the impact of a liquid drop on a smooth dry substrate is investigated with high-speed photography. A striking phenomenon is observed: splashing can be completely suppressed by decreasing the pressure of the surrounding gas. The threshold pressure where a splash first occurs is measured as a function of the impact velocity and found to scale with the molecular weight of ...

a high pressure drop happens when heavy oil with high viscosity moves through the oil pipeline. a variety of methods to avoid this pressure drop is available. one of which is injection of chemicals to reduce the viscosity and ultimately reduce pressure drop. using the pipesim software, the effect of dispersion of nano and micro-particles into the oil has been simulated to study the amount of th...