Figures 3 and 4 show that the
pressure gradient between the velopharynx and oropharynx was relatively large.
evaluated low permeability reservoir comprehensively by selecting abundance, effective thickness, throat radius, volume percentage of mobile fluid, start-up
pressure gradient, and effective driving factors based on the characteristics of low permeability reservoirs [5], and then, based on optimization, they established a comprehensive reservoir evaluation method for low permeability oil regions by selecting five parameters, namely, throat radius, volume percentage of mobile fluid, start-up
pressure gradient, clay content, and crude oil viscosity [6].
In the case of low flow rate, static
pressure gradient plays a main role in the total pressure loss.
Many investigators have reported the presence of a threshold gradient for certain reservoir formations, so that there is no flow through porous media when the
pressure gradient is below this value, and the relationship between flow rate and
pressure gradient was found to be approximately a straight line that does not pass through the origin.
Initially only a
pressure gradient into the x or length direction is assumed.
As the vacuum time and dyeing time increased, color change and dye uptake first gradually increased until water began to be discharged, leading to a decrease of the
pressure gradient in the log, and then decreased.
First, the value for height (h) does not appreciably change because the flow through the tracheobronchial tree originates from the
pressure gradient between the mouth and the alveoli.
According to the company, the device also demonstrated significantly lower
pressure gradient and less calcification than approved valves, after 5months in sheep.
The report said a variation in the sedimentation changes different parameters like conversion of energy,
pressure gradient between surface and ground water, meandering ( curve in a river's flow) and flow velocity among other factors vital for a stable river ecosystem.
Thus, in supine position, when the IJV is distended, the blood flow is governed by an oscillating
pressure gradient [7] and pressure waves generated by the cardiac revolution are then transmitted from the heart toward the brain (see Figure 1).
The occurrence of a leak changes the
pressure gradient along the pipeline in characteristic manner.
This was accomplished through comparison of the maximum and average pressure and root-mean-square (RMS) of the
pressure gradient of both the raw, unprocessed array data and data interpolated with a bilinear versus bicubic spline.