Numerical modeling of water hammer with fluid–structure interaction in a pipeline with viscoelastic supports

2018 ◽  
Vol 76 ◽  
pp. 469-487 ◽  
Author(s):  
Sławomir Henclik
Keyword(s):  
Numerical Modeling ◽  
Fluid Structure Interaction ◽  
Water Hammer ◽  
Fluid Structure ◽  
Structure Interaction

scholarly journals Numerical modeling in arterial hemodynamics incorporating fluid-structure interaction and microcirculation

2021 ◽  
Vol 18 (1) ◽  
Author(s):  
Fan He ◽  
Lu Hua ◽  
Tingting Guo
Keyword(s):  
Numerical Modeling ◽  
Shear Stress ◽  
Wall Shear Stress ◽  
Fluid Structure Interaction ◽  
Rigid Wall ◽  
Fluid Structure ◽  
Structure Interaction ◽  
Arterial Hemodynamics ◽  
Wall Compliance ◽  
Wall Shear

Abstract Background The effects of arterial wall compliance on blood flow have been revealed using fluid-structure interaction in last decades. However, microcirculation is not considered in previous researches. In fact, microcirculation plays a key role in regulating blood flow. Therefore, it is very necessary to involve microcirculation in arterial hemodynamics. Objective The main purpose of the present study is to investigate how wall compliance affects the flow characteristics and to establish the comparisons of these flow variables with rigid wall when microcirculation is considered. Methods We present numerical modeling in arterial hemodynamics incorporating fluid-structure interaction and microcirculation. A novel outlet boundary condition is employed to prescribe microcirculation in an idealised model. Results The novel finding in this work is that wall compliance under the consideration of microcirculation leads to the increase of wall shear stress in contrast to rigid wall, contrary to the traditional result that wall compliance makes wall shear stress decrease when a constant or time dependent pressure is specified at an outlet. Conclusions This work provides the valuable study of hemodynamics under physiological and realistic boundary conditions and proves that wall compliance may have a positive impact on wall shear stress based on this model. This methodology in this paper could be used in real model simulations.

Numerical Simulation of Fluid-Structure Interaction with Water Hammer in a Vertical Penstock Subjected to High Water Head

2013 ◽  
Vol 860-863 ◽  
pp. 1530-1534
Author(s):  
Hong Ming Zhang ◽  
Li Xiang Zhang
Keyword(s):  
Interaction Analysis ◽  
Fluid Structure Interaction ◽  
Shell Element ◽  
Water Source ◽  
High Water ◽  
Water Hammer ◽  
Curvilinear Coordinates ◽  
Fluid Structure ◽  
Structure Interaction ◽  
Weakly Compressible

The theoretical model of weakly compressible coupling water hammer was established and a FSI program code was developed for coupled weakly compressible water with penstock movement. It combines the weakly compressible water source CFD code and FEM shell element code. The shell element based on orthogonal curvilinear coordinates was completed in FEAP. Meanwhile, the turbulence model in OpenFoam class library was called by using object-oriented technology. This code takes into account both the weak compressibility of water and fluid turbulence characteristics. Using this code, a fluid structure interaction analysis with water hammer was completed. The numerical results agree well with the field test results.

Analysis of Coupled Water Hammer Vibration Equation of Improvement

2014 ◽  
Vol 926-930 ◽  
pp. 2986-2991
Author(s):  
Jian Bing Zhu ◽  
Zhi Min Su ◽  
Zhi Fang Tian ◽  
Xue Lu ◽  
Cheng Jie Jiang
Keyword(s):  
Continuity Equation ◽  
Fluid Structure Interaction ◽  
Water Hammer ◽  
Coupling Vibration ◽  
Fluid Structure ◽  
Vibration Equation ◽  
Structure Interaction ◽  
Continuity Equations

This paper further analyzes some existent problems of coupling vibration equations of water hammer, based on the improved continuity equation, it is derived simply for calculating coupled water hammer vibration, comparison with continuity equation that is to be used widely, the new continuity equation is basically consistent with commonly used continuity equations, so, the improved continuity equation can be used to calculate water hammer based on fluid-structure interaction (FSI).

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