Results of recent experiments that clarify the effects of mechanical degradation and viscoelastic behavior on the flow of partially hydrolyzed polyacrylamide solutions through porous media are presented. From these results, a simple model that may be used to predict injectivity of polyacrylamide solutions is developed. Injection pressures for linear corefloods are shown to be separable into two...

We deal with a solid manifold block and a laminated manifold block that are used for connecting hydraulic components. They are useful for reducing the space and weight of hydraulic systems. We investigate pressure drops of their pipe flow with computational fluid dynamics (CFD) and compare those of two types. The majority of all pressure drops in both types is pressure drop at corners. In solid...

The esti mati on of the functions that descri be the shear stress and the pressure drop across the short orifice die as a function of shear rate at different mean pressures for linear-low-density polyethylene copolymer (LLDPE) at 190oC is obtained using Genetic Programmi ng (GP) . The GP has been running base d on e xpe rimental data in two cases; shear stress and pressure drop at differe nt me...

In order to simulate and study the change of pressure drop after leakage airport oil supply pipeline network, a set simulation system network was built. The tightness tested based on medium kerosene. accuracy calculation model verified quantitatively qualitatively, under temperature established. results show that test is good. Under condition remains unchanged, difference decreases with increas...

Drop-on-demand printing applications involve a drop connected to fluid reservoir between which volume can be exchanged, situation that idealized as sessile with prescribed flux across the drop/reservoir boundary. Here we compute frequency spectrum for these pressure disturbances, it depends upon static contact-angle $\alpha$ (CA) and an empirical constant $\chi$ relating either (i) pinned or (i...

Hydrolysed polyacrylamide (HPAM) mother liquor is mainly used to extract oil. The HPAM solution is needed to filter the impurity using a bag filter before it is injected into the oil well. Therefore, the pressure drop of HPAM mother liquor must be less than 0.02 MPa in the processing of impurity filtration. The influence factors on pressure drop need to be researched. In this work, the computat...

A double-blind cross-over trial of timolol maleate (Timoptol) while routine medical therapy was continued gave the result that pressure was reduced by 3.22 mmHg is compared to placebo and 5.01 compared to pre-timolol levels in 24 patients. There was also a small (1.858 mmHg) drop in pressure in placebo treated eyes, a small and statistically significant drop in resting pulse rate, 76.67 to 71.3...