pressure jump

pressure jump

[′presh·ər ‚jəmp]
(meteorology)
A steady-state propagation of a sudden finite change of inversion height, in analogy to the shock wave in a compressible fluid or to a hydraulic jump; the prefrontal squall line has been interpreted as a pressure jump, with the cold front providing the initial pistonlike impetus.
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References in periodicals archive ?
Different from the most widely used quench cooling techniques, in RC process the melts are solidified by high pressure jump (pressure of the melt can increase from atmospheric pressure to 2.5 GPa in only 20 ms) rather than temperature drop, so it can get rid of the thermal conductivity limitation of polymer materials and proves effective to prepare amorphous polymer materials in large bulk.
The existing radial step with length in the pumping direction [psi] produces a pressure jump from [p.sub.h1] to [p.sub.h2].
Su, "High pressure jump apparatus for measuring Gruneisen parameter of NaCl and studying metastable amorphous phase of poly (ethylene terephthalate)," Review of Scientific Instruments, vol.
Absorption by light by molecules beneath the surface creates a thermally induced pressure jump that launches sound waves that are measured by ultrasound receivers at the surface and reassembled to create what is, in effect, a photograph.
I couldn't believe it when I saw the cabin pressure jump from 18,000 feet on our nondigital, barostatic gauge, to 38,000 feet and quickly return to 18,000 feet.
I bet I'm not the only doctor whose blood pressure jumped upon hearing this news.
My blood pressure jumped double digits when the sight of numerous, mature, Merriam's gobblers strutted into view.
High Blood Pressure Jumps Among Seniors, Especially Blacks
Another physician's blood pressure jumped to 320 mm Hg.
Your blood pressure jumps a notch as you stand there seething, usually next to a hyper child who has clearly overdosed on Smarties.
In the preliminary study, average blood pressure jumped 10 millimeters of mercury, heart rate increased 16 beats per minute, and epinephrine levels in the blood increased about 50 percent after using smokeless tobacco.