pressure gradient
Effect of wellbore storage on the vertical well pressure behavior with threshold pressure gradient in low permeability reservoirs
... additional pressure gradient is needed in certain low permeability oil formations to enable fluid flow to overcome viscous ...minimum pressure gradient has been referred to as the threshold ...
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Dynamical behaviour of three-way throttle valve with pressure gradient stabilization
... Mathematical simulation of dynamical behaviour of the three-way throttle valve with pressure gradient stabilization was firstly performed for the throttling (i.e. Δ y = − 1.5 mm) of the slide valve of the ...
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Bypass Boundary Layer Transition on Flat Plate by Adverse Pressure Gradient
... adverse pressure gradient was investigated ...adverse pressure gradient by different free stream turbulence ...Adverse pressure gradient was set by diffuser in tested section of ...
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Development status of threshold pressure gradient in china
... models generally consider only a single effect and is relatively simple. Besides, the own conditions of the reservoir, such as cracks and clay minerals, are very difficult to be determined and often be overlooked. ...
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A Gamma kL Transition Model for Transitional Flow with Pressure Gradient Effects
... The present research work has been conducted in order to continually develop and propose a new and complete version of the k L transition model that can apply to the transitional flow with pressure ...
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Similarity in adverse pressure gradient turbulent flows
... A total head tube can be used to determine the friction velocity. This technique assumes the existence of a log-law in the flow. This assumption, applied to adverse pressure gradient flows, continues to be ...
307
On 'spot' evolution under an adverse pressure gradient
... adverse pressure gradients, although this must be regarded as ...favourable pressure gradient the typical channel-flow ‘spot’ tends to be wider in planform than the boundary-layer case ...adverse ...
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Correlations of coronary plaque wall thickness with wall pressure and wall pressure gradient: a representative case study
... wall pressure (WP, blood pressure on the lumen wall) and spatial wall pressure gradient (WPG) in a human atherosclerotic right coronary artery were ...mean pressure, the Pearson ...
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The pressure gradient in the human respiratory tract
... The pressure gradient is necessary to transport the air from the mount (or nose) to pulmonary ...of pressure gradient ...the pressure gradient and resistance in the bronchial ...
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Boundary dominated flow in low permeability reservoir with threshold pressure gradient
... the pressure gradient that has to be attained for fluid to start ...the pressure gradient is smaller than TPG, flow velocity increases in a non-linear relationship, when pressure ...
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Pressure signature in adverse-pressure-gradient wall bounded turbulent flows
... In adverse pressure gradient flows, static pressure increases in the flow direction,.. in comparison with zero and favorable pressure gradient flows, where 5P/dx = 0 and.[r] ...
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Validation of pressure gradient and peripheral fractional flow reserve measured by a pressure wire for diagnosis of iliofemoral artery disease with intermediate stenosis
... mean pressure gradient (MPG) and mean pressure ratio (MPR) were mea- sured at baseline and after injection of isosorbide dinitrate in 23 lesions with angiographically intermediate iliofemoral ...
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Pressure Gradient, Power, and Energy of Vortices
... the pressure gradient in ...of pressure and gravitational gradients corresponding to generation of kinetic energy equaling, exceeding, and falling short of frictional ...
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THE ALVEOLAR ARTERIAL OXYGEN PRESSURE GRADIENT IN ANEMIA
... The per cent of venous admixture can be expressed as the ratio X-A where X is the blood oxygen content corresponding to the oxygen tension of alveolar air, A is the arterial content, and[r] ...
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Vol 2, No 5 (2011)
... axial pressure gradient and pressure rise per one ...the pressure gradient, pumping characteristics and friction force are discussed in ...
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Experimental and computational investigation of flow about low aspect ratio ellipsoids at transcritical Reynolds numbers
... surface pressure measurements for the lower Reynolds numbers increase in value com- pared to the other curves as the thickness of the laminar boundary layer ...in pressure, when compared to the curves at ...
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Computational modelling of heat transfer in an annular porous medium solar energy absorber with the p1 radiative differential approximation
... is the albedo and is a temperature function. The gradients of the functions in (2) and (3) are therefore introduced into the energy conservation equation in the present problem. For two-dimensional axisymmetric porous ...
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The Physiology of the Tettigoniid Ear
... A pressure microphone is backed by a closed cavity, but in a pressure-gradient microphone both sides of the membrane are exposed to the sound wave and so will respond to the difference i[r] ...
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Effects of Slip and Heat Transfer on the Peristaltic MHD Flow of Carreau Fluid with Different Wave Forms
... field, pressure gradient, pressure rise and heat transfer distribution but they did not study the different wave forms and shear stress on the peristaltic flow of a Carreau ...
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Pressure flow studies in man: effect of atrial systole on left ventricular function
... the pressure gradient technique was used to measure instantaneous aortic blood flow and pressure in nine patients, six having complete heart block and three having normal sinus ...
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