Video: Water entry of a sphere moving along a circular path at a constant speed

2013 ◽

Vol 419 ◽

pp. 97-102

Author(s):

Wei Cao ◽

Chun Tao He ◽

Cong Wang

Keyword(s):

Computational Simulation ◽

Water Entry ◽

Constant Speed ◽

Cavity Wall ◽

Navier Stokes ◽

Navier Stokes Equation ◽

Half Angle ◽

Expansion Dynamic ◽

Different Depths ◽

Volume Method

Computational simulation investigation which is based on the Navier-Stokes equation, finite-volume method, dynamic mesh method, and volume of fluid method, was carried out principally on the constant speed vertical water entry of the cone with 75 degree and a half angle. Based on this, the cavity generation and the process of cavity wall expansion of the cone with 75 degree and a half angle were analyzed. Through analyzing the expansion dynamic for the cavity wall in different depths, the velocity and acceleration with time in the process of cavity wall expansion were obtained, and the disturbances and splash feature laws of the free surface near the entrance of the cavity after cones water-entry were analyzed too.

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Ball and Taper Roller Bearings

Journal of the Royal Aeronautical Society ◽

10.1017/s0368393100121649 ◽

1946 ◽

Vol 50 (423) ◽

pp. 199-236 ◽

Cited By ~ 2

Author(s):

M. S. Frenkel

Keyword(s):

Constant Speed ◽

Circular Path ◽

Ball Bearings ◽

Analytical Treatment ◽

Centre Of Gravity ◽

Roller Bearings ◽

Rolling Body

This analytical treatment gives general considerations concerning “ true rolling ” of a rolling body in a circular path : firstly, for constant speed of its centre of gravity, and, secondly, for acceleration of its centre of gravity. From these are derived the relations of the dimensions, as function of the conditions, and the corresponding constructions for both taper roller bearings and ball bearings, which are essential to produce “ true rolling” at constant and variable shaft speeds.

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How to speed up to be in time: Action-judgment dissociations in children and adults

Swiss Journal of Psychology ◽

10.1024/1421-0185.63.1.17 ◽

2004 ◽

Vol 63 (1) ◽

pp. 17-29 ◽

Cited By ~ 4

Author(s):

Friedrich Wilkening ◽

Claudia Martin

Keyword(s):

Rating Scale ◽

Constant Speed ◽

Linear Condition ◽

Speed Up ◽

Nonlinear Condition ◽

Speed Change ◽

Catch Up ◽

Normative Rule ◽

Judgment Condition ◽

Time Linear

Children 6 and 10 years of age and adults were asked how fast a toy car had to be to catch up with another car, the latter moving with a constant speed throughout. The speed change was required either after half of the time (linear condition) or half of the distance (nonlinear condition), and responses were given either on a rating scale (judgment condition) or by actually producing the motion (action condition). In the linear condition, the data patterns for both judgments and actions were in accordance with the normative rule at all ages. This was not true for the nonlinear condition, where children’s and adults’ judgment and also children’s action patterns were linear, and only adults’ action patterns were in line with the nonlinearity principle. Discussing the reasons for the misconceptions and for the action-judgment dissociations, a claim is made for a new view on the development of children’s concepts of time and speed.

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Constant-Speed Vehicle

AccessScience ◽

10.1036/1097-8542.pr000002 ◽

2016 ◽

Keyword(s):

Constant Speed

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Ocular pursuit of a target moving in an apparent circular path.

PsycEXTRA Dataset ◽

10.1037/e413912004-001 ◽

1956 ◽

Cited By ~ 1

Author(s):

Earl F., Ii Miller

Keyword(s):

Circular Path ◽

Ocular Pursuit

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Reduced Risk Alternatives for Water Entry Detection in High Water Producing Horizontal Wells

10.2523/11433-ms ◽

2007 ◽

Cited By ~ 1

Author(s):

Okenufowo Ojonah ◽

James Kohring

Keyword(s):

Horizontal Wells ◽

High Water ◽

Water Entry ◽

Reduced Risk

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Study of The Influence of Different Variables on Clathrate Practical Applications in Phenol Removal

Engineering and Technology Journal ◽

10.30684/etj.v38i9a.1123 ◽

2020 ◽

Vol 38 (9A) ◽

pp. 1373-1383

Author(s):

Riyadh S. AL- Mukhtar ◽

Shurooq T. Remedhan ◽

Marwa N. Hussin

Keyword(s):

Crystal Structures ◽

High Capacity ◽

Volume Ratio ◽

Constant Speed ◽

Water Volume ◽

Phenol Removal ◽

Process Performance ◽

Economic Costs ◽

Practical Applications ◽

Glass Cell

In this work, effluent wastewater treated by using cyclopentane-water Clathrate system to treat water contaminates with phenols at concentrations (300, 250, 200, 150, 100 and 50) ppm in order to investigate the capability of process performance. Clathrate or hydrate are strong crystal structures including water (host particles) and little particles (guest particles). The experiments were conducted at different cyclopentane-water volume ratios (1: 2 and 1: 4). The work was done in a 250 ml glass cell with an electric mixer at a constant speed of 280 cycles per minute. Phenol was highest removal percent at 300ppm at 1: 4volume ratio was (92.3%), while the lowest concentration at 50 ppm and 1: 2volume ratio was (55%). Yield and Enrich factor had the highest values at the lowest concentration 50ppm and 1:2 volume ratio were (85% and 2.42) respectively. The technique of the Clathrate proved that it has a high capacity in the separation and achieve high removal percentage compared to other methods at standard conditions when the pressure of 1 atmosphere and temperature higher than the degree of freezing water and less economic costs compared to other methods.

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