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fluid-structure-systems
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Free vibrations of composite tanks partially filled with fluid
, Article Thin-Walled Structures ; Volume 47, Issue 12 , 2009 , Pages 1567-1574 ; 02638231 (ISSN) ; Haddadpour, H ; Kouchakzadeh, M. A ; Sharif University of Technology
Abstract
This paper aims to the investigation of free vibrations of laminated composite tanks partially filled with liquid. The governing equations of liquid motion are derived using a boundary element formulation of incompressible potential flow. The structure of tank is modeled as a composite shell and modal analysis technique is used for structural modeling of the tank. The structural modal equations are combined with the equations of liquid motion to obtain the governing equations of the coupled fluid-structure system. The obtained model is utilized for determination of natural frequencies of some example tanks which represent good agreements in comparison with the literature. Finally, an...
Stability analysis of whirling composite shells partially filled with two liquid phases
, Article Journal of Mechanical Science and Technology ; Volume 31, Issue 5 , 2017 , Pages 2117-2127 ; 1738494X (ISSN) ; Nikkhah Bahrami, M ; Firouz Abadi, R ; Sharif University of Technology
Abstract
In this paper, the stability of whirling composite cylindrical shells partially filled with two liquid phases is studied. Using the first-order shear shell theory, the structural dynamics of the shell is modeled and based on the Navier-Stokes equations for ideal liquid, a 2D model is developed for liquid motion at each section of the cylinder. In steady state condition, liquids are supposed to locate according to mass density. In this study, the thick shells are investigated. Using boundary conditions between liquids, the model of coupled fluid-structure system is obtained. This coupled fluid-structure model is employed to determine the critical speed of the system. The effects of the main...
Effect of multiphase fluid and functionally graded density fluid on the stability of spinning partially-filled shells
, Article International Journal of Mechanical Sciences ; Volume 140 , 2018 , Pages 109-118 ; 00207403 (ISSN) ; Nikkhah Bahrami, M ; Dehghani Firouz Abadi, R ; Sharif University of Technology
Elsevier Ltd
2018
Abstract
The effect of a multiphase fluid, including an arbitrary number of liquid phases, and a functionally graded density fluid on the stability of rotating partially-filled cylindrical shells is investigated. The first-order shear shell theory is used for modeling the structural dynamics of the shell and a 2D model is introduced based on the Navier–Stokes equations, for fluid motion. The multiphase and the functionally graded density fluids are arranged according to the mass density in a steady state condition due to centrifugal forces. Using the boundary conditions between liquid phases and the boundary conditions of the fluid on the cylinder wall, the coupled fluid-structure system model is...