ترجمة وتحليل الكلمات عن طريق الذكاء الاصطناعي ChatGPT
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- كيف يتم استخدام الكلمة في اللغة
- تردد الكلمة
- ما إذا كانت الكلمة تستخدم في كثير من الأحيان في اللغة المنطوقة أو المكتوبة
- خيارات الترجمة إلى الروسية أو الإسبانية، على التوالي
- أمثلة على استخدام الكلمة (عدة عبارات مع الترجمة)
- أصل الكلمة
%ما هو (من)٪ 1 - تعريف
![Just beyond the [[Swartswood Lake]] Dam, the river is forced to narrow by a concrete bridge support. Flow separation is evident at the sharp bend, just above the vena contracta](https://commons.wikimedia.org/wiki/Special:FilePath/Flow separation in a river.JPG?width=200 "Just beyond the [[Swartswood Lake]] Dam, the river is forced to narrow by a concrete bridge support. Flow separation is evident at the sharp bend, just above the vena contracta")
![Iron-carbon [[phase diagram]], showing the conditions necessary to form different phases](https://commons.wikimedia.org/wiki/Special:FilePath/Iron carbon phase diagram.svg?width=200 "Iron-carbon [[phase diagram]], showing the conditions necessary to form different phases")
![Minkowski diagram of Einstein's 1911 [[thought experiment]] on length contraction. Two rods of rest length <math>A' B' = A'' B'' = L_0</math> are moving with 0.6c in opposite directions, resulting in <math>A^\ast B^\ast <L_0</math>.](https://commons.wikimedia.org/wiki/Special:FilePath/EinsteinContraction.svg?width=200 "Minkowski diagram of Einstein's 1911 [[thought experiment]] on length contraction. Two rods of rest length <math>A' B' = A'' B'' = L_0</math> are moving with 0.6c in opposite directions, resulting in <math>A^\ast B^\ast <L_0</math>.")
![Formula on a wall in Leiden, Netherlands. Lorentz was chair of theoretical physics at the [[University of Leiden]] 1877-1910](https://commons.wikimedia.org/wiki/Special:FilePath/Lorentz contractie - mural Leiden, 2017.jpg?width=200 "Formula on a wall in Leiden, Netherlands. Lorentz was chair of theoretical physics at the [[University of Leiden]] 1877-1910")
ويكيبيديا
Vena contracta is the point in a fluid stream where the diameter of the stream is the least, and fluid velocity is at its maximum, such as in the case of a stream issuing out of a nozzle (orifice). (Evangelista Torricelli, 1643). It is a place where the cross section area is minimum. The maximum contraction takes place at a section slightly downstream of the orifice, where the jet is more or less horizontal.
The effect is also observed in flow from a tank into a pipe, or a sudden contraction in pipe diameter. Streamlines will converge just downstream of the diameter change, and a region of separated flow occurs from the sharp corner of the diameter change and extends past the vena contracta.
Formation of vena contracta can be seen in the venturimeter.
