Water Glass
Water Glass :
See: Adhesive Water Hammer. (F1 Mech) A pressure wave traveling along a column of liquid when flow is suddenly halted or the velocity of the fluid is changed abruptly. Note: The pressure surge travels from the origin to the point of relief and back. The velocity of the surge wave is sonic, and depends on the diameter, thickness, and elasticity of the conduit and on the specific gravity and compressibility of the liquid. With fast-flowing streams, abrupt shut-off creates pressure waves sufficiently strong to damage hoses and pumps
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