scholarly journals AN EXPERIMENTAL INVESTIGATION OF HYDRODYNAMIC DAMPING DUE TO BAFFLE ARRANGEMENTS IN A RECTANGULAR TANK

2006 ◽  
Vol 12 (12) ◽  
pp. 607-623
Author(s):  
Younes F. ◽  
Younes K. ◽  
El-Maddah M. ◽  
Ibrahim M. ◽  
El-Dannanh H.
Keyword(s):  
Experimental Investigation ◽  
Hydrodynamic Damping ◽  
Rectangular Tank

An experimental investigation of hydrodynamic damping due to vertical baffle arrangements in a rectangular tank

2007 ◽  
Vol 221 (3) ◽  
pp. 115-123 ◽  
Author(s):  
M F Younes ◽  
Y K Younes ◽  
M El-Madah ◽  
I M Ibrahim ◽  
E H El-Dannanh
Keyword(s):  
Damping Ratio ◽  
Small Scale ◽  
Test Rig ◽  
Transient Responses ◽  
Hydrodynamic Damping ◽  
Liquid Slosh ◽  
Liquid Free Surface ◽  
Rectangular Tank ◽  
Scale Test ◽  
Vertical Baffle

The present work is concerned with an experimental study of the hydrodynamic damping provided by using vertical baffles in partially filled rectangular tanks. The damping ratio is evaluated for different vertical baffle dimensions, shapes, numbers, and arrangements. A small-scale test rig consisting of a partially filled rectangular tank with a pendulum suspension is designed and constructed to measure the transient responses of the system. The baffles are fitted to attenuate the lateral motion of the liquid slosh. Lower mounted and upper mounted vertical baffles of different heights and numbers are tested. Lower mounted vertical baffles with holes of different sizes and numbers are considered. Finally, the effect of a combination between upper, lower, and holed vertical baffles on the system damping is investigated. The results show that the size and location of the vertical baffles significantly influence the hydrodynamic damping. In general, the damping ratio increases as the tip of the lower mounted baffle plate is close to the liquid free surface and the location of the plate is close to the centre of the tank. Increasing the baffle numbers increases the damping ratio. The upper mounted vertical baffles are more suitable for a chargeable tank. The twin side upper mounted baffles and centre-holed lower mounted baffle arrangements give a maximum damping ratio.

Hydrodynamic damping due to baffles in a rectangular tank

2001 ◽  
Vol 28 (4) ◽  
pp. 608-616 ◽  
Author(s):  
Michael Isaacson ◽  
Sundaralingam Premasiri
Keyword(s):  
Theoretical Model ◽  
Energy Dissipation ◽  
Total Energy ◽  
Earthquake Engineering ◽  
Flow Separation ◽  
Average Rate ◽  
Experimental Measurements ◽  
Hydrodynamic Damping ◽  
Rectangular Tank

The present paper describes the prediction of hydrodynamic damping due to baffles in a fluid-filled rectangular tank or reservoir undergoing horizontal oscillations. The estimation of hydrodynamic damping involves an assessment of the total energy in the fluid associated with sloshing motions and the average rate of energy dissipation due to flow separation around the baffles. Experimental measurements of hydrodynamic damping have been carried out to validate the theoretical model and to investigate the effectiveness of various baffle configurations. Recommendations are made regarding the assessment of hydrodynamic damping in earthquake engineering applications.Key words: baffles, hydrodynamic damping, sloshing, tanks.

Do moods and expectancies have unique or interactive effects?: An experimental investigation

2014 ◽  
Author(s):  
Shane Close ◽  
Victoria Adkins ◽  
Kandice Perry ◽  
Katheryn Eckles ◽  
Jill Brown ◽  
...  
Keyword(s):  
Experimental Investigation ◽  
Interactive Effects
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