An investigation of the

compressibility effect in capillary rheometer was performed using the 2-domain Tait equation [18, 19]:

Model Series B: Fluid

Compressibility Effect Another parameter that affects the oil production in an undersaturated oil reservoir is the fluid compressibility.

The prewhirl reduces the

compressibility effect at convex side of the eye to avoid the formation of shock waves and the consequent losses (Fig.

Under the similar experimental conditions to those in this work, the

compressibility effect in the rheological property of the PS melt was verified to be neglected via the PVT test [7].

Finally, the melt

compressibility effect was taken into account by introducing the temperature coefficient of density [[alpha].sub.p]] and pressure coefficient of density [[beta].sub.p]] (6).

To investigate the

compressibility effect on shrinkage, the anisotropic shrinkage as a function of packing time were calculated with and without inclusion of the

compressibility effect.

For large Mach numbers, at the time of overlap, the upper surface shock of the lower airfoil resulted in a larger change in [c.sub.z] of the upper airfoil - this result is due to

compressibility effects. A large change in [c.sub.z] is observed at M = 0.90 compared to M = 0.47 in Fig.

1 along with the estimated apparent shear rate with

compressibility effects. To analyze the effect of compressibility, the specific volume of the polymer melt in the rheometer barrel was modeled using the Tait equation [42], wherein changes in the specific volume as a function of pressure can cause the shear rate in the capillary to vary significantly from the apparent values.

Researchers in [4] presents two calculation models at subsonic and supersonic regime, finding that for subsonic and supersonic regime, the

compressibility effects of the primary air are not correctly replicated and the wall effects are not characterized in the generation of the boundary layer.

Steady state, turbulent flow conditions are assumed and

compressibility effects are ignored.

et al

Compressibility Effects in Two- Phase Flow" Journal of Applied Physics Vol.