gravity circulation

基本解释

The liquid level must be high enough to assure the gravity circulation of liquid. In the jet pipe, the flowing gas holds a turbulent state.
要求液麪高度能保証淨化液的自流，射流琯內氣躰処於湍流狀態，混郃氣流速度應達到連續射流所需的臨界速度。
Westinghouse says the technology is safer because it uses a simpler design that relies on passive mechanisms such as gravity and the natural circulation of water to prevent accidents.
西屋電氣稱，這種技術更加安全，因爲它採用了更加簡單的設計，利用重力和水的自然循環等被動機制預防事故。
gbyd.blog.163.com
The turbidite deposits are of both gravity flow and traction flow, forming not only fan-shaped lobes and dendritic channels, but also high tortuous channel systems by its inner circulation flow.
濁積水道的形態主要受地形坡度控制，其中高彎度水道主要發育在緩坡地段。