pressure gradient

(redirected from Pressure gradients)
Also found in: Dictionary, Encyclopedia.

pressure gradient

The difference in hydrostatic pressure on either side of a membrane. As the difference in pressures rises, filtration increases from the area of high pressure to the area of low pressure.
See also: gradient
References in periodicals archive ?
Comparison of the analytical and numerical solutions for the cross-channel velocity profile (a) and the down-channel velocity profile (b) for t/[D.sub.b] = 1.0 and three dimensionless pressure gradients ([[PI].sub.p,z] = -0.5, [[PI].sub.p,z] =0.0, [[PI].sub.p,z] =0.5).
At first glance, the physical "drivers" of reservoir evaporation might seem relatively straightforward given that the flux of water vapor from a reservoir is largely governed by the magnitude of the vapor pressure gradient between the water surface and the overlying air.
Caption: Figure 13: Evolution of the number of flowback proppant particles and proppant spreading area for different pressure gradients.
After the mesh has been divided effectively, the seepage behaviors in the four different coal microstructure models during the water injection process were simulated under different pressure gradients using CFX15.0 software.
Because this analysis is done in time domain, this results in pressure gradients with values of 1.55GPa/s (basic condition) and 6GPa/s (maximum gradient).
Results: Immediately after balloon dilation, the pressure gradient across the pulmonary valve decreased from 73.09 [+ or -] 21.89 mmHg (range: 43-151 mmHg) to 24.49 [+ or -] 17.00 mmHg (range: 3-92 mmHg; P < 0.001) and the right ventricular systolic pressure decreased from 95.34 [+ or -] 23.44 mmHg (range: 60-174 mmHg) to 52.07 [+ or -] 18.89 mmHg (range: 22-134 mmHg; P < 0.001).
Furthermore, these morphological changes inhibited the pressure gradient and laminarized the complex recirculation flow in the upper airway.
In the case of low flow rate, static pressure gradient plays a main role in the total pressure loss.
G., " Effect of Developing Pressure Gradients on TBL Wall Pressure Spectrums," Proceedings Flow Induced Noise and Vibration Issues and Aspects 2013, Rome, Italy, 2013.
The orientation of the pairs of limits is slightly turned toward positive pressure gradients. This leads to an earlier air entrainment for decreasing pressure gradients at a given coating speed.
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.
The contract is the delivery of mechanical heart valves for aortic orifice with minimal pressure gradients and maximum EDA and EOAI, delivery of mechanical prostheses for completely supra-aortic anular implantation of mechanical heart valves for aortic and mitral orifice with low thrombogenicity and delivery dvojlistEi mechanical valvular prostheses for intraanulEirnu and supra-aortic implantation with design Open Pivot