Analysis of Fluid Slosh in Partially Filled Tanks and Their Impact on the Directional Response of Tank Vehicles

Ranganathan, R.; Yu, Ying; Miles, John B.

doi:10.4271/932942

Cited by 33 publications

(28 citation statements)

References 3 publications

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“…Alternatively, mechanical analogous of fluid slosh and analytical methods have been employed to analyze the transient as well as steady-state dynamic fluid slosh responses [5,[12][13][14][15]. The mechanical-equivalent models, however, may pose considerable challenges in parameter identification and are generally limited to low amplitude slosh.…”

Section: Introductionmentioning

confidence: 99%

An Analysis of Baffles Designs for Limiting Fluid Slosh in Partly Filled Tank Trucks~!2009-10-29~!2010-04-21~!2010-07-23~!

Kandasamy¹,

Rakheja²,

Ahmed³

2010

TOTJ

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Abstract:This study presents an analysis of effectiveness of different designs of baffles, including the conventional, partial and oblique, in limiting the manoeuvre-induced transient as well as steady-state fluid slosh forces and moments in a partly-filled tank truck. The effect of an alternating arrangement of partial baffles is also explored. A three-dimensional computational fluid dynamics model of a partly-filled tank is developed to study the relative anti-slosh properties of different baffles designs and layouts under combined idealized longitudinal and lateral acceleration fields and different cargo loads. The analyses are also performed for a cleanbore tank, which is validated using the widely-used quasi-static slosh model. The results suggest that the conventional transverse baffles offer important resistance to fluid slosh under braking manoeuvres, while the obliquely placed baffles could help limit the longitudinal as well as lateral fluid slosh under combined lateral and longitudinal acceleration excitations.

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Section: Introductionmentioning

confidence: 99%

An Analysis of Baffles Designs for Limiting Fluid Slosh in Partly Filled Tank Trucks~!2009-10-29~!2010-04-21~!2010-07-23~!

Kandasamy¹,

Rakheja²,

Ahmed³

2010

TOTJ

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“…For this reason, the mid-rectangular section was used when calculating the equivalent model's parameters given by Abramson [6]. The equations proposed by [6] were then resolved and the following results were obtained: Other approaches for analytical calculation of equivalent models that represent longitudinal fluid motion in horizontal circular cross section tanks can be found in [7,8].…”

Section: Fig 9 Three-dimensional Finite Element Ansys Modelsmentioning

confidence: 99%

“…In the present study, the "pendulum model" developed by Ranganathan [7] was used. This model basically consists of a pendulum with a length, l p , a point mass, m p , attached at its free end, representing the fraction of the liquid that takes part in the oscillating motion, and a point mass, m 0 , fixed to the tank at a certain height, h 0 , representing the stationary part of the fluid.…”

Section: Lateral Sloshing Modelmentioning

confidence: 99%

“…The sloshing movements of liquids inside containers are usually simulated by means of highly sophisticated finite element computer programs able to solve the complex fluid flow equations, such as Navier-Stokes equations. Since it is rather difficult to intégrate such complex finite element fluid flow models into a multibody system simulation program, an equivalent multibody model was sought that would be able to represent the liquid's sloshing and its interaction with the vehicle [6][7][8][9][10][11].…”

Section: Development and Incorporation Of The Fluid Modelmentioning

confidence: 99%

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Simulation of Freight Trains Equipped with Partially Filled Tank Containers and Related Resonance Phenomenon

Vera

Paulin²,

Suarez³

et al. 2005

Proceedings of the Institution of Mechanical Engineers, Part F:

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In order to study the fluid motion -vehicle dynamics interaction, a model of four liquid filled two-axle container freight wagons was set up. The railway vehicle has been modelled as a multibody system. To include fluid sloshing, an equivalent mechanical model has been developed and incorporated. The influence of several factors has been studied in computer simulations, such as track defects, curve negotiation, train velocity, wheel wear, liquid and solid wagonload, and container baffles. SIMPACK has been used for multibody systems analysis, and ANSYS for liquid sloshing modelling and equivalent mechanical systems validation. Acceleration and braking manoeuvres of the freight train set the liquid cargo into motion. This longitudinal sloshing motion of the fluid cargo inside the tanks initiated a swinging motion of some components of the coupling gear. The coupling gear consists of UIC standard traction hooks and coupling screws that are located between buffers. One of the coupling screws is placed in the traction hook of the opposite wagón thus joining the two wagons, whereas the un-used coupling screw rests on a hanger. Simulation results showed that, for certain combinations of type of liquid, filling level and container dimensions, the liquid cargo could provoke an undesirable, although not hazardous, reléase of the un-used coupling screw from its hanger. The coupling screw's reléase was especially obtained when a period of acceleration was followed by an abrupt braking manoeuvre at 1 m/s2. It was shown that a resonance effect between the liquid's oscillation and the coupling screw's rotary motion could be the reason for the coupling screw's undesired reléase. Possible solutions in order to avoid the phenomenon are given.

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“…There are several equivalent mechanical models that simulate 2D liquid movement in a partially filled tank with different shapes such as spring-mass and simple pendulum models [1][2][3][4]. The use of such models in the liquid simulation provides convincing results when it comes to lateral sloshing.…”

Section: Introductionmentioning

confidence: 99%

3D Dynamical Model for Liquid Sloshing Simulation in a Partially Filled Elliptical Tank

Noui¹,

Bouazara²,

Richard³

2018

EasyChair Preprints

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Abstract-Many of 2D mechanical models have been developed to simulate liquid sloshing of a partially filled tank with different shapes. However, those models didn't represent properly the complex liquid motion, especially in the case of portable tanks. Indeed, forces exerted on the liquid can be lateral, longitudinal and vertical. Then, liquid displacement and pressure forces applied to the tank walls are undervalued and may cause design flaws. In this case, 2D mechanical models are ineffective for liquid motion simulation. In previous studies, a 3D equivalent mechanical model has been developed. This dynamical model is used to simulate different liquid motion in a partially filled tank that consider any sort of excitement forces and get more accurate results in terms of displacements and pressure forces. In this study, a brief description of the new dynamical model is given, including the liquid discretization process, stiffness and damping coefficients computing method and equations of motion. Afterward, the model is applied to an elliptical cross section tank to obtain displacement and pressure forces of the liquid. Finally, the results are compared to the literature.

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Analysis of Fluid Slosh in Partially Filled Tanks and Their Impact on the Directional Response of Tank Vehicles

Cited by 33 publications

References 3 publications

An Analysis of Baffles Designs for Limiting Fluid Slosh in Partly Filled Tank Trucks~!2009-10-29~!2010-04-21~!2010-07-23~!

An Analysis of Baffles Designs for Limiting Fluid Slosh in Partly Filled Tank Trucks~!2009-10-29~!2010-04-21~!2010-07-23~!

Simulation of Freight Trains Equipped with Partially Filled Tank Containers and Related Resonance Phenomenon

3D Dynamical Model for Liquid Sloshing Simulation in a Partially Filled Elliptical Tank

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