A comparative study between partitioned and monolithic methods for the problems with 3D fluid-structure interaction of blood vessels

Ha, Sang Truong; Ngo, Long Cu; Saeed, Muhammad; Jeon, Bo-Young; Choi, Hyun-Ki

doi:10.1007/s12206-016-1230-2

Cited by 34 publications

(16 citation statements)

References 20 publications

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“…[21][22][23] The monolithic approach has also been demonstrated to produce better convergence behaviour with lower computational time than the partitioned approach for FSI simulations involving large deformation. 24 A recent study by Baumler et al 23 applied the monolithic FSI approach using an open source code, SimVascular, in a patient specific TBAD model. A good agreement with 4D PC-MRI was obtained by applying pre-stress, viscoelastic tissue support and a regionally defined flap elasticity, yet at the expense of significantly high computational cost.…”

Section: Introductionmentioning

confidence: 99%

Effect of intimal flap motion on flow in acute type B aortic dissection by using fluid‐structure interaction

Chong

Chan

et al. 2020

Numer Methods Biomed Eng

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A monolithic, fully coupled fluid-structure interaction (FSI) computational framework was developed to account for dissection flap motion in acute type B aortic dissection (TBAD). Analysis of results included wall deformation, pressure, flow, wall shear stress (WSS), von Mises stress and comparison of hemodynamics between rigid wall and FSI models. Our FSI model mimicked realistic wall deformation that resulted in maximum compression of the distal true lumen (TL) by 21.4%. The substantial movement of intimal flap mostly affected flow conditions in the false lumen (FL). Flap motion facilitated more flow entering the FL at peak systole, with the TL to FL flow split changing from 88:12 in the rigid model to 83:17 in the FSI model. There was more disturbed flow in the FL during systole (5.8% FSI vs 5.2% rigid) and diastole

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Section: Introductionmentioning

confidence: 99%

Effect of intimal flap motion on flow in acute type B aortic dissection by using fluid‐structure interaction

Chong

Chan

et al. 2020

Numer Methods Biomed Eng

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“…The mathematical model adopted for PCHE-DAC in the current study is based on a discretized LMTD method used and developed by Saeed et al [2,30,31]. A heat exchanger code was built based on this model; pressure drop and heat transfer correlation used for the current study are listed in Table 1.…”

Section: Numerical Models and Methodology 21 Mathematical Model Formentioning

confidence: 99%

“…The heat exchanger models explained earlier are recuperator models. Assuming that both PCHEs are fully shielded for heat losses to surroundings, the energy conservation equation for the LTR and HTR is given by Equations (30) and 31.…”

Section: Turbomachinery Modelsmentioning

confidence: 99%

Performance of Supercritical CO2 Power Cycle and Its Turbomachinery with the Printed Circuit Heat Exchanger with Straight and Zigzag Channels

2020

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Since printed circuit heat exchangers (PCHE) are the largest modules of a supercritical carbon dioxide Brayton cycle, they can considerably affect the whole system’s performance and layout. Straight-channel and zigzag-channel printed circuit heat exchangers have frequently been analyzed in the standalone mode and repeatedly proposed for sCO2−BC. However, the impact of heat exchanger designs with straight and zigzag-channel configurations on the performance of the cycle and its components, i.e., the turbine and compressor, has not been studied. In this context, this study evaluates the effect of different heat exchanger designs with various values of effectiveness (ϵ), inlet Reynolds number (Re), and channel configuration (zigzag and straight channel) on the overall performance of the sCO2−BC and its components. For the design and analysis of PCHEs, an in-house PCHE design and analysis code (PCHE-DAC) was developed in the MATLAB environment. The sCO2−BC performance was evaluated utilizing an in-house cycle simulation and analysis code (CSAC) that employs the heat exchanger design code as a subroutine. The results suggest that pressure drop in PCHEs with straight-channel configuration is up to 3.0 times larger than in PCHEs with zigzag-channel configuration. It was found that a higher pressure drop in the PCHEs with straight channels can be attributed to substantially longer channel lengths required for these designs (up to 4.1 times than zigzag-channels) based on the poor heat transfer characteristics associated with these channel geometries. Thus, cycle layouts using PCHEs with a straight-channel configuration impart a much higher load (up to 1.13 times) on the recompression compressor, this in turn, results in a lower pressure ratio across the turbine. Therefore, the overall performance of the sCO2−BC using PCHEs with straight-channel configurations is found to be substantially inferior to that of layouts using PCHEs with zigzag-channel configurations. Finally, optimization results suggest that heat exchanger’s design with inlet Reynolds number and heat exchanger effectiveness ranging from 32 k to 42 k and 0.94>ϵ>0.87, respectively, are optimal for sCO2−BC and present a good bargain between cycle efficiency and its layout size.

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“…On the other hand, existing flow solvers and structural solvers can be employed in a partitioned simulation, reducing software development efforts and improving manageability. Furthermore, this approach can solve FSI problems that do not require matching meshes at the interfaces between the solid and the fluid [8]. Degroote et al [9], [10] compared the monolithic and partitioned approaches and reported that the performance of the two approaches was problem-dependent.…”

Section: Introductionmentioning

confidence: 99%

Immersed Boundary Method Application as a Way to Build a Simplified Fluid-Structure Model

Borges

Lourenço

Padilla

et al. 2019

Boundary Elements and Other Mesh Reduction Methods XLII

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A simplified fluid-structure interaction model, consisting of a cylinder tethered by a spring system interacting dynamically with an incompressible two-dimensional lid-driven cavity flow, is solved using the immersed boundary method. Results show that when the spring forces are weaker than the fluid drag force, the springs stretch freely and the cylinder motion is the direct result of the fluid dynamics action. For higher values of spring forces, the cylinder motion reaches a maximum displacement, and the spring forces induce the cylinder to an oscillatory movement damped by the fluid drag forces. Subsequently the amplitude of the displacement decreases. The cylinder motion is restricted within the mainstream fluid flow, where the maximum displacement reduces as the Reynolds number increases.

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A comparative study between partitioned and monolithic methods for the problems with 3D fluid-structure interaction of blood vessels

Cited by 34 publications

References 20 publications

Effect of intimal flap motion on flow in acute type B aortic dissection by using fluid‐structure interaction

Effect of intimal flap motion on flow in acute type B aortic dissection by using fluid‐structure interaction

Performance of Supercritical CO2 Power Cycle and Its Turbomachinery with the Printed Circuit Heat Exchanger with Straight and Zigzag Channels

Immersed Boundary Method Application as a Way to Build a Simplified Fluid-Structure Model

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