scholarly journals Coupling CFD-DEM with dynamic meshing: A new approach for fluid-structure interaction in particle-fluid flows

2018 ◽  
Vol 325 ◽  
pp. 620-631 ◽  
Author(s):  
Yi. He ◽  
Andrew E. Bayly ◽  
Ali Hassanpour
Keyword(s):  
Fluid Structure Interaction ◽  
Fluid Flows ◽  
New Approach ◽  
Fluid Structure ◽  
Structure Interaction ◽  
Dynamic Meshing

scholarly journals Numerical Methods for Fluid-Structure Interaction — A Review

2012 ◽  
Vol 12 (2) ◽  
pp. 337-377 ◽  
Author(s):  
Gene Hou ◽  
Jin Wang ◽  
Anita Layton
Keyword(s):  
Numerical Methods ◽  
Fluid Structure Interaction ◽  
Fluid Flows ◽  
Fluid Structure Interactions ◽  
Fluid Structure ◽  
Structure Interaction ◽  
Wide Range ◽  
Recent Developments ◽  
Conforming Meshes ◽  
Incompressible Fluid Flows

AbstractThe interactions between incompressible fluid flows and immersed structures are nonlinear multi-physics phenomena that have applications to a wide range of scientific and engineering disciplines. In this article, we review representative numerical methods based on conforming and non-conforming meshes that are currently available for computing fluid-structure interaction problems, with an emphasis on some of the recent developments in the field. A goal is to categorize the selected methods and assess their accuracy and efficiency. We discuss challenges faced by researchers in this field, and we emphasize the importance of interdisciplinary effort for advancing the study in fluid-structure interactions.

SPACE–TIME FLUID–STRUCTURE INTERACTION METHODS

2012 ◽  
Vol 22 (supp02) ◽  
pp. 1230001 ◽  
Author(s):  
KENJI TAKIZAWA ◽  
TAYFUN E. TEZDUYAR
Keyword(s):  
Fluid Structure Interaction ◽  
Fluid Flows ◽  
Space Time ◽  
Computational Accuracy ◽  
Fluid Structure ◽  
Variational Multiscale ◽  
Structure Interaction ◽  
Flow Problems ◽  
Core Technology ◽  
Special Space

Since its introduction in 1991 for computation of flow problems with moving boundaries and interfaces, the Deforming-Spatial-Domain/Stabilized Space–Time (DSD/SST) formulation has been applied to a diverse set of challenging problems. The classes of problems computed include free-surface and two-fluid flows, fluid–object, fluid–particle and fluid–structure interaction (FSI), and flows with mechanical components in fast, linear or rotational relative motion. The DSD/SST formulation, as a core technology, is being used for some of the most challenging FSI problems, including parachute modeling and arterial FSI. Versions of the DSD/SST formulation introduced in recent years serve as lower-cost alternatives. More recent variational multiscale (VMS) version, which is called DSD/SST-VMST (and also ST-VMS), has brought better computational accuracy and serves as a reliable turbulence model. Special space–time FSI techniques introduced for specific classes of problems, such as parachute modeling and arterial FSI, have increased the scope and accuracy of the FSI modeling in those classes of computations. This paper provides an overview of the core space–time FSI technique, its recent versions, and the special space–time FSI techniques. The paper includes test computations with the DSD/SST-VMST technique.

scholarly journals A Hybrid Continuum-Particle Approach for Fluid-Structure Interaction Simulation of Red Blood Cells in Fluid Flows

Fluids ◽  
2021 ◽  
Vol 6 (4) ◽  
pp. 139
Author(s):  
Lahcen Akerkouch ◽  
Trung Bao Le
Keyword(s):  
Fluid Flow ◽  
Red Blood Cells ◽  
Blood Cells ◽  
Fluid Structure Interaction ◽  
Fluid Flows ◽  
Accurate Estimation ◽  
Cellular Dynamics ◽  
Fluid Structure ◽  
Structure Interaction ◽  
Particle Approach

Transport of cells in fluid flow plays a critical role in many physiological processes of the human body. Recent developments of in vitro techniques have enabled the understanding of cellular dynamics in laboratory conditions. However, it is challenging to obtain precise characteristics of cellular dynamics using experimental method alone, especially under in vivo conditions. This challenge motivates new developments of computational methods to provide complementary data that experimental techniques are not able to provide. Since there exists a large disparity in spatial and temporal scales in this problem, which requires a large number of cells to be simulated, it is highly desirable to develop an efficient numerical method for the interaction of cells and fluid flows. In this work, a new Fluid-Structure Interaction formulation is proposed based on the use of hybrid continuum-particle approach, which can resolve local dynamics of cells while providing large-scale flow patterns in the vascular vessel. Here, the Dissipative Particle Dynamics (DPD) model for the cellular membrane is used in conjunction with the Immersed Boundary Method (IBM) for the fluid plasma. Our results show that the new formulation is highly efficient in computing the deformation of cells within fluid flow while satisfying the incompressibility constraints of the fluid. We demonstrate that it is possible to couple the DPD with the IBM to simulate the complex dynamics of Red Blood Cells (RBC) such as parachuting. Our key observation is that the proposed coupling enables the simulation of RBC dynamics in realistic arterioles while ensuring the incompressibility constraint for fluid plasma. Therefore, the proposed method allows an accurate estimation of fluid shear stresses on the surface of simulated RBC. Our results suggest that this hybrid methodology can be extended for a variety of cells in physiological conditions.

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