| 单词 | roll wave |
| 释义 | > as lemmasroll wave roll wave n. Physics a wave that appears to roll over the surface of a liquid; spec. a type of surface wave that occurs as one of a series of such waves separated by calm liquid and moving faster than the bulk liquid.Roll waves are commonly seen in water flowing down a sloping channel. ΚΠ 1904 Geogr. Jrnl. 24 462 The Terrestrial Wave Committee Report, drawn up by Dr. Vaughan Cornish, gave a photograph and description of a roll-wave which moves downstream faster than the current—a form sometimes found in the Tees. 1925 Science 1 May 468/2 Sea waves are of two kinds: deep sea waves which are oscillatory and which involve theoretically no translation of water longitudinally, and roll waves in which there is no oscillation and a maximum amount of translation of water. 1988 J. McPhee Los Angeles against Mountains in Control of Nature (1989) 219 The rest of the [mud] flow behind was coming twice as fast, making roll waves as it piled forward against itself. 2007 New Scientist 8 Dec. 85/1 Roll waves occur on the free surface of liquids, liquids carrying solid particles in suspension, slurries, and also at the interface of immiscible liquids. < as lemmas |
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