Space rate of variation of pressure in a given direction
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In hydrodynamics and hydrostatics, the pressure gradient (typically of air but more generally of any fluid) is a physical quantity that describes in which direction and at what rate the pressure increases the most rapidly around a particular location. The pressure gradient is a dimensional quantity expressed in units of pascals per metre (Pa/m). Mathematically, it is the gradient of pressure as a function of position. The gradient of pressure in hydrostatics is equal to the body force density (generalised Stevin's Law).
In petroleum geology and the petrochemical sciences pertaining to oil wells, and more specifically within hydrostatics, pressure gradients refer to the gradient of vertical pressure in a column of fluid within a wellbore and are generally expressed in pounds per square inch per foot (psi/ft). This column of fluid is subject to the compound pressure gradient of the overlying fluids. The path and geometry of the column is totally irrelevant; only the vertical depth of the column has any relevance to the vertical pressure of any point within its column and the pressure gradient for any given true vertical depth.
In hydrodynamics and hydrostatics, the pressuregradient (typically of air but more generally of any fluid) is a physical quantity that describes in which...
Blood pressure (BP) is the pressure of circulating blood against the walls of blood vessels. Most of this pressure results from the heart pumping blood...
In fluid dynamics, an adverse pressuregradient is a pressuregradient in which the static pressure increases in the direction of the flow. Mathematically...
Pore pressuregradient is a dimensional petrophysical term used by drilling engineers and mud engineers during the design of drilling programs for drilling...
effect. The pressure-gradient force is the force that results when there is a difference in pressure across a surface. In general, a pressure is a force...
pressure is defined as the external pressure required to be applied so that there is no net movement of solvent across the membrane. Osmotic pressure...
Potential gradient, the difference in electric charge between two adjoining regions Fluid dynamics and earth science Density gradientPressuregradient Temperature...
Depending on the definition of the term, there may also be an applied pressuregradient in the flow direction. The Couette configuration models certain practical...
to the lower pressures, the effective pressure vector force is contrary to the pressuregradient, whence the minus sign before the gradient vector. Friction...
of gas molecules. A gradient in field strength causes a force due to the magnetic pressuregradient called the magnetic pressure force. In SI units, the...
such as gravity, are balanced by a pressure-gradient force. In the planetary physics of Earth, the pressure-gradient force prevents gravity from collapsing...
measurement of the pressuregradient between the WHVP and the free hepatic venous pressures (FHPV), and thus is an estimate of the pressuregradient between the...
moving along a pressuregradient. Contrary to popular belief, however, the forces acting in this case do not originate from the lower pressure side (the vacuum)...
increasing pressure is known as flowing in an adverse pressuregradient. The boundary layer separates when it has travelled far enough in an adverse pressure gradient...
Cerebral perfusion pressure, or CPP, is the net pressuregradient causing cerebral blood flow to the brain (brain perfusion). It must be maintained within...
the pressuregradient force is balanced by the Coriolis effect. The direction of geostrophic flow is parallel to the isobars, with the high pressure to...
that substance or collection. A gradient is the change in the value of a quantity; for example, concentration, pressure, or temperature with the change...
the 19th century, the full extent of the large scale interaction of pressure-gradient force and deflecting force that in the end causes air masses to move...
or Euler equations (fluid dynamics) for ideal inviscid fluid, the gradient of pressure becomes a function of body forces only. The Navier-Stokes momentum...
elevation as well, and these variations have relevance in the context of pressuregradient force and its effects. However, the vertical variation is especially...
gradient (osmotic gradient) that draws water into the cells from the adjacent xylem. This creates turgor pressure, also known as hydrostatic pressure...
The pressure in the reservoir keeps increasing and then exceeds the pressure at compressor exit, thus resulting in an adverse pressuregradient in exit...
Coronary perfusion pressure (CPP) refers to the pressuregradient that drives coronary blood pressure. The heart's function is to perfuse blood to the...
chemical biology, tonicity is a measure of the effective osmotic pressuregradient; the water potential of two solutions separated by a partially-permeable...
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