Experimental study of the effects of a viscous liquid layer on the cavity dynamics of vertical entry by a sphere into water at low Froude number

2021 ◽  
Vol 33 (1) ◽  
pp. 013308
Author(s):  
Tiezhi Sun ◽  
Heng Wang ◽  
Chongbin Shi ◽  
Zhi Zong ◽  
Guiyong Zhang
Keyword(s):  
Experimental Study ◽  
Froude Number ◽  
Viscous Liquid ◽  
Liquid Layer ◽  
Low Froude Number

Experimental Study on a New Type of Aerator in Spillway with Low Froude Number and Mild Slope Flow

2009 ◽  
Vol 21 (3) ◽  
pp. 415-422 ◽  
Author(s):  
Pei-lan Su ◽  
Hua-sheng Liao ◽  
Yue Qiu ◽  
Chen-juan Li
Keyword(s):  
Experimental Study ◽  
Froude Number ◽  
Low Froude Number ◽  
New Type ◽  
Slope Flow

Further Results on Lee Vortices in Low-Froude-Number Flow

1991 ◽  
Vol 48 (19) ◽  
pp. 2204-2211 ◽  
Author(s):  
Richard Rotunno ◽  
Piotr K. Smolarkiewicz
Keyword(s):  
Froude Number ◽  
Low Froude Number ◽  
Number Flow

The Denver Cyclone. Part I: Generation in Low Froude Number Flow

1990 ◽  
Vol 47 (23) ◽  
pp. 2725-2742 ◽  
Author(s):  
N. Andrew Crook ◽  
Terry L. Clark ◽  
Mitchell W. Moncrieff
Keyword(s):  
Froude Number ◽  
Low Froude Number ◽  
Number Flow

Tribological Study of Polymer Composite Forming Using Model Experiments and Real Composites

2014 ◽  
Vol 611-612 ◽  
pp. 300-305 ◽  
Author(s):  
Olga Smerdova ◽  
Michael P.F. Sutcliffe
Keyword(s):  
Experimental Study ◽  
Polymer Composites ◽  
Viscous Liquid ◽  
Polymer Composite ◽  
Contact Area ◽  
Essential Feature ◽  
The Other ◽  
Carbon Fabric ◽  
Simultaneous Application ◽  
Composite Forming

This experimental study is focused on identification of tribological mechanisms acting during forming of polymer composites. The range of relevant processes includes fibre placement, tape lay-up, moulding, draping, and RTM. Two types of tribological experiments, relying both on simultaneous application of compression and shear loadings, are carried out. Firstly, model macromechanical tests are undertaken on plastic rods of millimetric diameter immersed in a viscous liquid, representing composite fibres and matrix, respectively. By careful simulation of forming conditions, this experiment helps to identify the friction phenomena occurring in real composites. On the other hand, the micromechanics of forming processes is studied through a microscopic experiment on real carbon fabric. This material is clamped between two glass plates and pulled in opposing directions in the plane of the fabric. It is hypothesized that the evolution of contact area due to shearing that can be measured in this experiment is an essential feature of the tribology of forming processes, a topic which hitherto has not been investigated.

Discussion of “Stilling Basin Design for Low Froude Number”

1976 ◽  
Vol 102 (6) ◽  
pp. 797-799
Author(s):  
Heramb D. Sharma ◽  
Dharam V. Varshney
Keyword(s):  
Froude Number ◽  
Stilling Basin ◽  
Low Froude Number

Experimental Study of Bubble Behaviour in a Flowing Liquid Layer

2021 ◽  
Author(s):  
Zhengzheng Zhang ◽  
Liangxing Li ◽  
Shuanglei Zhang ◽  
Muhammad Afnan Saleem
Keyword(s):  
Experimental Study ◽  
Liquid Layer ◽  
Flowing Liquid ◽  
Bubble Behaviour

scholarly journals Nose-Angle Bridge Piers as Alternative Countermeasures for Local Scour Reduction

2018 ◽  
Vol 13 (2) ◽  
pp. 110-120 ◽  
Author(s):  
Ibtesam Abudallah Habib ◽  
Wan Hanna Melini Wan Mohtar ◽  
Atef Elsaiad ◽  
Ahmed El-Shafie
Keyword(s):  
Froude Number ◽  
Local Scour ◽  
Bridge Piers ◽  
Scour Depth ◽  
Skew Angle ◽  
Flow Angle ◽  
Sediment Size ◽  
Low Froude Number ◽  
Skew Angles ◽  
Depth Reduction

This study investigates the performance nose-angle piers as countermeasures for local scour reduction around piers. Four nose angles were studied, i.e., 90°, 70°, 60° and 45° and tested in a laboratory. The sediment size was fixed at 0.39 mm whereas the flow angle of attack (or skew angle) was varied at four angles, i.e., skew angles, i.e., 0°, 10°, 20° and 30°. Scour reduction was clear when decreasing nose angles and reached maximum when the nose angle is 45°. Increasing the flow velocity and skew angle was subsequently increasing the scour profile, both in vertical and transversal directions. However, the efficiency of nose angle piers was only high at low Froude number less than 0.40 where higher Froude number gives minimal changes in the maximum scour depth reduction. At a higher skew angle, although showed promising maximum scour depth reduction, the increasing pier projected width resulted in the increase of transversal lengths.

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