Numerical evaluation of hydrodynamic damping due to the Upper Mounted Baffles in real scale tanks

Goudarzi, Mohammad Ali; Farshadmanesh, P.

doi:10.1016/j.soildyn.2015.06.003

Cited by 17 publications

(6 citation statements)

References 22 publications

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“…They found that the frequency range in which deflection has a suppressing effect is when the earth's motion is riched in frequency content. Goudarzi et al [22] investigated hydrodynamic damping in the presence of upper mounted baffle (UMB) in real-size tanks in a numerical research. They checked the accuracy of their analyzed model, investigated the effects of UMB to reduce sloshing waves, and finally proposed a seismic design method for investigating UMB and its effect on suppressing fluid waves.…”

Section: Introductionmentioning

confidence: 99%

Experimental Investigation on the Effect of Seal Presence on the Behavior of Double-Deck Floating Roofs in Cylindrical Steel Storage Tanks

Doustvandi¹,

Roudsari²,

Niazi³

2023

Structural Durability &Amp; Health Monitoring

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Liquid storage, particularly oil and petrochemical products which are considered hazardous liquid, are an important part of the oil industry. Thin-walled vertical cylindrical steel storage tanks are widely used in recent years. Due to high sensitivity of these structures in an earthquake and other external excitations may lead to catastrophic consequences. For instance, huge economic losses, environmental damages, and casualities, many studies have been done about these structures. past studies showed that liquid storage tanks, equipped with a floating roof, are potentially vulnerable while subjected to seismic loads and earthquake has been considered as one of the most destructive natural hazards. The reason is that such tanks are made of two separated parts (shell and roof) which each may have its own responses; sometimes causing resonance phenomenon and so that, roof movements, rooffluid interaction, roof-shell interaction, and also the way they are attached should still be investigated. Experimental tests of floating roof 's vertical fluctuation was performed in a full-scale reservoir tank and assessing of the results demonstrated that presence of a seal between floating roof and shell plate can significantly increase damping ratio in liquid sloshing and also suppress the roof`s vertical displacements. In other words, seal can control a floating roof and make it stop moving vertically over few cycles.

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Section: Introductionmentioning

confidence: 99%

Experimental Investigation on the Effect of Seal Presence on the Behavior of Double-Deck Floating Roofs in Cylindrical Steel Storage Tanks

Doustvandi¹,

Roudsari²,

Niazi³

2023

Structural Durability &Amp; Health Monitoring

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“…In particular, the tank can be damaged by increasing waves. Standing waves are the most concerning thing that can be seen at the top of the tank [3,4]. The behavior of liquid in a partially filled tank is determined by several parameters, including the form and size of the tank, the kind and volume of liquid, and the frequency and amplitude of external shocks.…”

Section: Introductionmentioning

confidence: 99%

Numerical Simulation of a Partly Filled Rectangular Tank with Fuel Oil

Farhan Lafta Rashid,

Emad Qasem Hussein,

Mudhar A. Al-Obaidi

et al. 2023

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Sloshing refers to a certain kind of fluid movement that changes as it progresses. It possesses properties that are both nonlinear and exceedingly unpredictable, and these properties affect the tank wall. This effect may lead to structural wear, which in turn can cause the tank to fail. Benzene and gasoil liquids are used to test the effect of sloshing liquid and accompanying pressure on the wall tank caused by the baffles in partially full fluid tanks. To attain this, modeling of the interaction between fluid and structure is justified using the finite element analysis while the ANSYS Fluent is used to do the simulation. Specifically, the analysis enables us to anticipate the pressure that is being exerted on the shield, the influence of sloshing on the grounding point forces, and the size of the sloshing waves. The pressure distribution over time indicates a reduction of pressure on the tank wall as a result of utilising a vertical baffle if compared to the case of a tank wall without a baffle. The usage of vertical shields allows for around 20% of the greatest contact energy to be deflected, which is attributed to the potential of generating turbulence and vortices by the baffle.

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“…Nayak and Biswal 24 used bottom- and surface-piercing wall mountings and confirmed by experiments that bottom mounted baffles may assist in the suppression of sloshing loads. Goudarzi and Farshadmanesh 25 demonstrated that the installation of upper mounted bafﬂes can reduce the maximum wave height experienced in partially filled rectangular tanks by up to 50%. Extensive numerical studies confirming the above have been carried out by Nayak and Biswal.…”

Section: Introductionmentioning

confidence: 99%

The influence of obliquely perforated dual-baffles on sway induced tank sloshing dynamics

Saghi

Mikkola

Hirdaris

2020

Proceedings of the Institution of Mechanical Engineers, Part M:

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This paper examines the influence of oblique perforated baffles on the sloshing dynamics of rectangular liquid storage tanks. The analysis presented accounts for sway induced hydrodynamic forces and entropy generation. Internal liquid free surface oscillation is modelled by the volume of fluid method. The effect of baffle geometric parameters, orientation and porosity on loads is examined and numerical results are compared against a set of experiments. Consequently, an engineering method suggesting the optimum size, angle of inclination and topology of baffles for the case of a rectangular tank is presented. It is shown that implementation of optimized oblique porous dual baffles may reduce sloshing loads by up to 15%.

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Numerical evaluation of hydrodynamic damping due to the Upper Mounted Baffles in real scale tanks

Cited by 17 publications

References 22 publications

Experimental Investigation on the Effect of Seal Presence on the Behavior of Double-Deck Floating Roofs in Cylindrical Steel Storage Tanks

Experimental Investigation on the Effect of Seal Presence on the Behavior of Double-Deck Floating Roofs in Cylindrical Steel Storage Tanks

Numerical Simulation of a Partly Filled Rectangular Tank with Fuel Oil

The influence of obliquely perforated dual-baffles on sway induced tank sloshing dynamics

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