The Experts below are selected from a list of 5982 Experts worldwide ranked by ideXlab platform
Kamila Kotrasová - One of the best experts on this subject based on the ideXlab platform.
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parametric study of seismic response of Cylindrical Tank
International Conference of Numerical Analysis and Applied Mathematics (ICNAAM 2018), 2019Co-Authors: Kamila Kotrasová, Eva Kormaníková, Martin VasinaAbstract:Dynamic analysis of circular vertical ground supported liquid storage Tank is one of the complicated problem in the earthquake engineering. The paper deals with the dynamic analysis of fluid effect on the circular Tank with considering of constant wall height and constant fluid filling height by variable Tank width. The analytical model of the Tank with liquid used in Eurocode 8 was used for parametric study.Dynamic analysis of circular vertical ground supported liquid storage Tank is one of the complicated problem in the earthquake engineering. The paper deals with the dynamic analysis of fluid effect on the circular Tank with considering of constant wall height and constant fluid filling height by variable Tank width. The analytical model of the Tank with liquid used in Eurocode 8 was used for parametric study.
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multiscale modeling of liquid storage laminated composite Cylindrical Tank under seismic load
Composites Part B-engineering, 2018Co-Authors: Eva Kormaníková, Kamila KotrasováAbstract:Abstract This paper presents the seismic response of laminated composite Cylindrical Tank in the framework of the first-order shear deformation theory. A random microstructure of composite material results in transversely isotropic properties at the meso-scale. The analysis of composites with random microstructure is done by using of a fictitious hexagonal microstructure. The laminated representative volume element is assumed for obtaining the effective material properties of the laminated composite. Seismic analysis of liquid storage laminated composite Tank is different from the analysis of typical structures. The fluid exerts hydrodynamic impulsive and hydrodynamic convective pressures together with hydrostatic pressure on Tank walls and bottom of the ground-supported fluid filling container during an earthquake. The knowledge of pressures and forces acting onto walls and bottom of the container and total hydrodynamic effects of liquid on storage Tank during earthquake loading plays fundamental role in the design of an earthquake resistance of fluid filling container. The seismic response of a fluid filling laminated composite container was solved for Slovakia region respecting recommendations of Eurocode 8 Part. 4. We considered only horizontal seismic load by using the elastic response spectrum.
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Numerical Experiment of Fluid - Structure - Soil Interaction
Procedia Engineering, 2017Co-Authors: Kamila Kotrasová, Slávka Harabinová, Iveta Hegedüšová, Eva Kormaníková, Eva PanulinováAbstract:Ground-supported circular Tanks are critical and strategic structures. There structures are used to store a variety of liquids. This paper provides numerical model on seismic response of fluid - structure - soil interaction. Numerical model on seismic response of fluid - structure -soil interaction of Cylindrical Tank was obtained by using of Finite Element Method (FEM). They can also be fluids, which in case of damage to the Tank, can contaminate the ground. Damage or collapse these containers may also be due to the influence of surrounding aggressive environments or an earthquake. The article also will be described impact aggressive environment in terms of standards and its impact on the quality of the concrete Tank.
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dynamic time history response of Cylindrical Tank considering fluid structure interaction due to earthquake
Applied Mechanics and Materials, 2014Co-Authors: Kamila Kotrasová, Ivan Grajciar, Eva KormaníkováAbstract:Ground-supported Cylindrical Tanks are used to store a variety of liquids. The fluid was develops a hydrodynamic pressures on walls and bottom of the Tank during earthquake. This paper provides dynamic time-history response of concrete open top Cylindrical liquid storage Tank considering fluid-structure interaction due to earthquake. Numerical model of Cylindrical Tank was performed by application of the Finite Element Method (FEM) utilizing software ADINA. Arbitrary-Lagrangian-Eulerian (ALE) formulation was used for the problem analysis. Two way Fluid-Structure Interaction (FSI) techniques were used for the simulation of the interaction between the structure and the fluid at the common boundary
Ben S Nasrallah - One of the best experts on this subject based on the ideXlab platform.
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numerical analysis of metal hydride Tank with phase change material
Applied Thermal Engineering, 2015Co-Authors: F Askri, A Jemni, S Mellouli, Ben N Khedher, Ben S NasrallahAbstract:Abstract This study discusses the challenges of using heat and hydrogen storage system consisting of a metal hydride Tank (MHT) equipped with a phase change material (PCM). A mathematical model was developed to study the bi-dimensional coupled heat and mass transfer inside the hydride bed as well as the PCM domain. The numerical computations have been conducted for two configurations (Cylindrical and spherical Tanks). Compared to Cylindrical Tank, the spherical one has the highest MHT-PCM system performance. Additionally, the results have shown that the PCM amount should be carefully optimized. Moreover, the results concerning the impact of MHT-PCM thermal insulation were also discussed.
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optimization of hydrogen storage in metal hydride Tanks
International Journal of Hydrogen Energy, 2009Co-Authors: F Askri, Ben M Salah, A Jemni, Ben S NasrallahAbstract:The storage time of hydrogen in metal-hydride Tanks (MHTs for short) is strongly influenced by the rate at which heat can be removed from the reaction bed. In the present work a two-dimensional mathematical model is developed and validated against experimental results. This model is used, first, to evaluate the impact of the Tank wall thermal mass on the hydriding process. Walls in steel and in brass are tested and the obtained results show that there is no significant effect on hydrogen storage time. Then, the established model is used to study the dynamic behaviour inside various designs of MHTs: i) a Cylindrical Tank, ii) a Cylindrical Tank with external fins, iii) a Cylindrical Tank with a concentric tube filled with flowing cooling fluid and iv) a Cylindrical Tank with a concentric tube equipped with fins. Optimization results indicate that almost 80% improvement of the storage time can be achieved over the case where the Tank is not optimized.
S. K. Bhattacharyya - One of the best experts on this subject based on the ideXlab platform.
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dynamic response of structure coupled with liquid sloshing in a laminated composite Cylindrical Tank with baffle
Finite Elements in Analysis and Design, 2010Co-Authors: K. C. Biswal, S. K. BhattacharyyaAbstract:Baffles are used effectively to reduce the sloshing response of liquid in the liquid storage containers. In this paper, the dynamic interaction that exists between the liquid and elastic Tank-baffle system has been considered to evaluate the coupled response of liquid and Tank-baffle system using the finite element method. The baffle and Tank wall are made up of lightweight laminated composite materials. The liquid is assumed to be incompressible and inviscid, and the flow is irrotational. The finite element equations of motion of liquid and structure domains are numerically integrated by Newmark's integration scheme. The interaction effect between the two fields is studied by transferring the structural normal acceleration to the liquid domain and liquid pressure to the structure domain. Effects of different parameters, such as being composite baffles, lamination scheme on the slosh frequencies and coupled vibration frequencies in the liquid filled composite Tanks have been studied. The effects of composite baffle parameters, such as being its dimensions and position in the Tank wall, on the sloshing response of liquid and structural response of liquid filled composite Tank are studied under translational base excitation.
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dynamic response analysis of a liquid filled Cylindrical Tank with annular baffle
Journal of Sound and Vibration, 2004Co-Authors: K. C. Biswal, S. K. Bhattacharyya, P. K. SinhaAbstract:Abstract Baffles are generally used as damping devices in liquid storage Tanks. The focus of the present paper is to study the influence of a baffle on the dynamic response of a partially liquid-filled Cylindrical Tank. A baffle is assumed here to have the shape of a thin annular circular plate. The natural frequencies of an inviscid and incompressible liquid are determined for varying positions and dimensions of a baffle attached normal to the Tank wall. The flexibility of both the baffle and the Tank are considered in studying the effects of liquid–baffle and liquid–Tank interactions on the sloshing mode frequencies. Finite element codes are developed and are then used to analyze both the liquid domain and the structural domain (i.e., the Tank and the baffle). The coupled vibration frequencies of the Tank–baffle system are computed considering the effect of sloshing of liquid. The results obtained for a liquid-filled elastic Tank without a baffle and a rigid Tank with a rigid baffle are in good agreement with the available results. The slosh amplitude of liquid in a rigid Tank with and without a rigid baffle is studied under translational base excitation. The effects of the Tank wall and baffle flexibility on the slosh response are also investigated.
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free vibration analysis of liquid filled Tank with baffles
Journal of Sound and Vibration, 2003Co-Authors: K. C. Biswal, S. K. Bhattacharyya, P. K. SinhaAbstract:The natural frequencies of liquid in a liquid-filled Cylindrical rigid Tank without and with baffles are evaluated. An annular plate is used as a baffle, which is fitted to the inner periphery of a Cylindrical Tank. Both rigid and flexible baffles are considered. Finite elements are used to discretize both the liquid and the structural domain. The slosh frequencies of liquid are computed for different dimensions, thicknesses and positions of baffles, both rigid and flexible considering the circumferential wave number as one. The axisymmetric and other asymmetric modes are not studied. The results obtained for rigid baffle case are comparable with the existing results. The coupled vibration frequencies of the Tank-flexible-baffle system are computed considering the effect of sloshing of liquid.
Eva Kormaníková - One of the best experts on this subject based on the ideXlab platform.
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parametric study of seismic response of Cylindrical Tank
International Conference of Numerical Analysis and Applied Mathematics (ICNAAM 2018), 2019Co-Authors: Kamila Kotrasová, Eva Kormaníková, Martin VasinaAbstract:Dynamic analysis of circular vertical ground supported liquid storage Tank is one of the complicated problem in the earthquake engineering. The paper deals with the dynamic analysis of fluid effect on the circular Tank with considering of constant wall height and constant fluid filling height by variable Tank width. The analytical model of the Tank with liquid used in Eurocode 8 was used for parametric study.Dynamic analysis of circular vertical ground supported liquid storage Tank is one of the complicated problem in the earthquake engineering. The paper deals with the dynamic analysis of fluid effect on the circular Tank with considering of constant wall height and constant fluid filling height by variable Tank width. The analytical model of the Tank with liquid used in Eurocode 8 was used for parametric study.
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multiscale modeling of liquid storage laminated composite Cylindrical Tank under seismic load
Composites Part B-engineering, 2018Co-Authors: Eva Kormaníková, Kamila KotrasováAbstract:Abstract This paper presents the seismic response of laminated composite Cylindrical Tank in the framework of the first-order shear deformation theory. A random microstructure of composite material results in transversely isotropic properties at the meso-scale. The analysis of composites with random microstructure is done by using of a fictitious hexagonal microstructure. The laminated representative volume element is assumed for obtaining the effective material properties of the laminated composite. Seismic analysis of liquid storage laminated composite Tank is different from the analysis of typical structures. The fluid exerts hydrodynamic impulsive and hydrodynamic convective pressures together with hydrostatic pressure on Tank walls and bottom of the ground-supported fluid filling container during an earthquake. The knowledge of pressures and forces acting onto walls and bottom of the container and total hydrodynamic effects of liquid on storage Tank during earthquake loading plays fundamental role in the design of an earthquake resistance of fluid filling container. The seismic response of a fluid filling laminated composite container was solved for Slovakia region respecting recommendations of Eurocode 8 Part. 4. We considered only horizontal seismic load by using the elastic response spectrum.
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Numerical Experiment of Fluid - Structure - Soil Interaction
Procedia Engineering, 2017Co-Authors: Kamila Kotrasová, Slávka Harabinová, Iveta Hegedüšová, Eva Kormaníková, Eva PanulinováAbstract:Ground-supported circular Tanks are critical and strategic structures. There structures are used to store a variety of liquids. This paper provides numerical model on seismic response of fluid - structure - soil interaction. Numerical model on seismic response of fluid - structure -soil interaction of Cylindrical Tank was obtained by using of Finite Element Method (FEM). They can also be fluids, which in case of damage to the Tank, can contaminate the ground. Damage or collapse these containers may also be due to the influence of surrounding aggressive environments or an earthquake. The article also will be described impact aggressive environment in terms of standards and its impact on the quality of the concrete Tank.
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dynamic time history response of Cylindrical Tank considering fluid structure interaction due to earthquake
Applied Mechanics and Materials, 2014Co-Authors: Kamila Kotrasová, Ivan Grajciar, Eva KormaníkováAbstract:Ground-supported Cylindrical Tanks are used to store a variety of liquids. The fluid was develops a hydrodynamic pressures on walls and bottom of the Tank during earthquake. This paper provides dynamic time-history response of concrete open top Cylindrical liquid storage Tank considering fluid-structure interaction due to earthquake. Numerical model of Cylindrical Tank was performed by application of the Finite Element Method (FEM) utilizing software ADINA. Arbitrary-Lagrangian-Eulerian (ALE) formulation was used for the problem analysis. Two way Fluid-Structure Interaction (FSI) techniques were used for the simulation of the interaction between the structure and the fluid at the common boundary
S Mellouli - One of the best experts on this subject based on the ideXlab platform.
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numerical analysis of metal hydride Tank with phase change material
Applied Thermal Engineering, 2015Co-Authors: F Askri, A Jemni, S Mellouli, Ben N Khedher, Ben S NasrallahAbstract:Abstract This study discusses the challenges of using heat and hydrogen storage system consisting of a metal hydride Tank (MHT) equipped with a phase change material (PCM). A mathematical model was developed to study the bi-dimensional coupled heat and mass transfer inside the hydride bed as well as the PCM domain. The numerical computations have been conducted for two configurations (Cylindrical and spherical Tanks). Compared to Cylindrical Tank, the spherical one has the highest MHT-PCM system performance. Additionally, the results have shown that the PCM amount should be carefully optimized. Moreover, the results concerning the impact of MHT-PCM thermal insulation were also discussed.
