Severn Bore Effect

(redirected from Water Hammer Effect)
A proposal which seeks to explain medullary scarring in patients with chronic pyelonephritis in absence of infection. It was proposed by Lord Rosenheim, who in a 1963 review in the British Medical Journal, hypothesized whether the scarring could arise from unattentuated (due to ureteral dilation and vesicoureteral reflux) beating of fluid waves released during micturition against the caliceal surface, which he likened to the Severn Bore
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* Industry's strongest aluminum shell reduces the possibility of water hammer effect.
Other mechanisms have been proposed, such as a sudden increase in intraabdominal pressure, a water hammer effect that involves simultaneous occlusion of the aorta and a sudden increase in blood pressure, and the osseous pinch effect from entrapment of the aorta between the anterior chest wall and the vertebral column [1].
When the liquid's momentum stops, its direction reverses and the liquid returns to the low pressure area creating a water hammer effect. Depending on the initial flow rate, the pipe gradient and the fluid mass, the pump casing may become stressed, with potential for failure.
Additionally, HDPE pipe has a high strain allowance, which reduces the chance of breaking pipes due to water hammer effect.
Water hammer effect is used to accommodate shock pressure conditions.
* Rapid Crack Progression: an imposed failure, attributed to high pressure spikes in the fluid either due to blockage, overpressure from pumping systems or water hammer effects from valve shut off; or