单词 | rheogram |
释义 | rheogramn. 1. Physics. Originally: a print showing the rate of elongation of cylinders of dough under the action of gravity. Later: a graph of shear stress against shear rate. ΘΚΠ the world > matter > physics > mechanics > dynamics > fluid dynamics > [noun] > rheology > diagram rheogram1933 1933 R. K. Schofield & G. W. S. Blair in Proc. Royal Soc. A. 139 558 A study was made of the rate of elongation of cylinders of unyeasted dough hung vertically by their upper ends and allowed to extend under the action of gravity... It has been found convenient to mark on the dough cylinders a series of fine parallel lines accurately spaced 1 mm. apart. The marks were made by successive turns of a fine wire wrapped round a frame, which are wetted with enamel, the marks remaining wet long enough to be subsequently printed off on to a strip of duplicator paper... The print (which may be called a rheogram) is available for whatever analysis appears suitable. 1941 J. Stanley in Industr. & Engin. Chem. (Analyt. ed.) June 404/2 These facts are secured from the rheograms. 1944 G. W. S. Blair Surv. Gen. & Appl. Rheol. x. 123 Stanley..used the word ‘rheogram’ to describe a rate-of-shear stress curve. This is confusing, since such flow curves are quite different from the charts so described by Schofield and Scott Blair. 1974 P. L. Moore et al. Drilling Pract. Man. vi. 224 One procedure suggested by Forbes includes construction of a regular rheogram chart of shear stress versus shear rate. 1995 Jrnl. Coastal Res. 11 914/2 Figures 4a,b and 5a,b are rheograms which show the nearly completed shear thinning flow behavior of the natural samples. 2. Medicine and Physiology. A record of a study of blood flow performed by rheography. ΚΠ 1959 Confinia Neurologica 19 2 Kaindl observed changes in impedance during partial or total ligation of the carotid artery on one side while recording the rheogram. 1980 Jrnl. Pediatric Surg. 15 363/2 Rheograms were taken to evaluate the blood supply. 2004 Progr. Neuro-psychopharmacol. & Biol. Psychiatry 28 1146/1 The resulting time series were inspected visually for body movements, eye blinks, eye movements, EMG, ECG, rheogram, and loose electrodes artifacts. This entry has been updated (OED Third Edition, June 2010; most recently modified version published online March 2022). < n.1933 |
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