Analytical and experimental evaluation on the effectiveness of upper mounted baffles with respect to commonly used baffles

In this paper, an experimental and an analytical investigation of the hydrodynamic damping due to lower and upper mounted vertical baffles as well as horizontal baffles in partially filled rectangular tanks are conducted. The analytical model earlier provided to estimate the hydrodynamic damping rat...

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Bibliographic Details
Published in:Ocean engineering 2012-03, Vol.42, p.205-217
Main Authors: Goudarzi, M.A., Sabbagh-Yazdi, S.R.
Format: Article
Language:English
Subjects:
Applied sciences
Baffles
Cylindrical tanks
Damping
Estimates
Exact sciences and technology
Experimental study
Ground, air and sea transportation, marine construction
Horizontal
Hydrodynamic damping
Liquid tanks
Marine and water way transportation and traffic
Mathematical analysis
Ocean engineering
Sloshing
Tanks
Upper mounted baffles
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Summary:In this paper, an experimental and an analytical investigation of the hydrodynamic damping due to lower and upper mounted vertical baffles as well as horizontal baffles in partially filled rectangular tanks are conducted. The analytical model earlier provided to estimate the hydrodynamic damping ratio of lower mounted vertical baffles is extended for upper mounted baffles. The semi-empirical Miles expression, which was originally developed to evaluate damping ratio of ring baffles in cylindrical tanks is also formulated for horizontal baffles in rectangular tanks. The comparisons between maximum hydrodynamic damping cased by various baffle configurations (upper and lower mounted vertical arrangements, as well as horizontal arrangements) are made and the validity of extended analytical models is discussed. ► Upper mounted baffles has a great potential as a sloshing suppress device. ► Developed analytical solutions have enough accuracy to utilize for baffles design. ► Horizontal baffles have significant damping effects in slender tanks. ► Vertical baffles are more effective for broad tanks. ► Overall, horizontal baffles are more efficient, but less economical.
ISSN:0029-8018
1873-5258
DOI:10.1016/j.oceaneng.2011.12.005