Sweep effect

But despite the great reductions in recovery caused by sweep effects, currently the design of a field project is often dominated by other concerns. 

However, we have also considered that the low viscosities of gas injection fluids, combined with density differences, cause these fluids to finger through and override the target oil, leaving a substantial fraction of it uncontacted by the injected fluid and, thus, unproduced. These detrimental sweep effects present the greatest single target for improvement of gas-flood EOR, and their alleviation is currently the object of a wide spectrum of applied research. 

Within the filling room, all aseptic manipulations and process stages requiring exposure of the dosage form or product contact components should be protected by localized laminar flow drawing air from the Class 100 environment. The importance of this protection is not in the sterility of the air but in the sweeping effect of the air. 

Achievement of satisfactory air velocities is imperative to laminar flow installations. The laminarity and the sweeping effects that are essential to their effective operation are functions of air velocity. The standard within the pharmaceutical industry is an average velocity of 90 ft/min with a plus or minus 20% tolerance. 

Y. Takagai and S. Igarashi, Homogeneous hquid-liquid extraction and micellar eleetrokinetie ehromatography using sweeping effect concentration system for determination of trace amounts of several polycyclic aromatic hydrocarbons. Ana/. Bioanal. Chem., 373, 87—92, 2002. 

On the basis of Figures 15-17, it may be stated that in an oil-wet system the flow of the polymer solution advancing connate water and distilled water takes place with its initial viscosity and mobility further, that in the porous media no apparent permeability reduction occurs. With knowledge of the close relationship between the polymer adsorbed on the rock surface and the flow characteristics, this phenomenon may be traced to the absence of an irreversible gel layer over the pore surface. On an oil-wet surface the quantity of polymer bound by chemisorption, regardless of the type, is zero, and thus the "sweep effect of the carrier phase is also perfect. 

Wash immediately with what is available on the site of the accident Water will provide the mechanical sweeping effect at the surface of the stratum comeum. Based on our knowledge, any washing solntion can remove more than 90 % of the chemical agent at the surface of the tissue. That is a lot but not enough. Why ... 

The Rate is the number of cycles per second (Hz) of the effect. Flanges tend to have slower rates and produce a pronounced sweeping effect. 

The Center frequency is the tonal center of the sweeping effect Slide this around to achieve a more intense or more subtle effect. 

Of the many technological advances in recent years, the explosion in applications of Internet technology is having the most sweeping effects. Our study of the future impact of buyer-supplier Internet-enabled exchanges (Daniel et al., 2003) highlighted three areas ... 

The drift current is relatively insensitive to the junction electric field. As noted above, this field sweeps away mobile electrons and holes. However, this sweeping effect does not depend upon how large the field is as long as it is not too small. 

In order to minimize the probe heating effect (measure disturber), the number of the measure points will be 80x80 (the sweeping time negatively influences the probes ), for example ... 

Type V isotherms of water on carbon display a considerable variety of detail, as may be gathered from the representative examples collected in Fig. 5.14. Hysteresis is invariably present, but in some cases there are well defined loops (Fig. 5.14(b). (t ), (capillary-condensed water. Extreme low-pressure hysteresis, as in Fig. 5.14(c) is very probably due to penetration effects of the kind discussed in Chapter 4. 

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