54767 NUMERICAL MODELING AND ANALYSIS OF JOURNAL BEARING WITH COUPLED ELASTOHYDRODYNAMIC LUBRICATION AND FLEXIBLE MULTIBODY DYNAMICS(Fluid-Structure Interaction in MBS)

2010 ◽  
Vol 2010.5 (0) ◽  
pp. _54767-1_-_54767-8_
Author(s):  
Juhwan Choi ◽  
Seong Su Kim ◽  
Jin Hwan Choi
Keyword(s):  
Numerical Modeling ◽  
Multibody Dynamics ◽  
Journal Bearing ◽  
Fluid Structure Interaction ◽  
Elastohydrodynamic Lubrication ◽  
Flexible Multibody Dynamics ◽  
Fluid Structure ◽  
Modeling And Analysis ◽  
Structure Interaction ◽  
Flexible Multibody

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.

Computational Modeling and Analysis of Fluid Structure Interaction in Micromixers with Deformable Baffle

2017 ◽  
Vol 15 (3) ◽  
Author(s):  
R. Madhumitha ◽  
S. Arunkumar ◽  
K. K. Karthikeyan ◽  
S. Krishnah ◽  
V. Ravichandran ◽  
...  
Keyword(s):  
Reynolds Number ◽  
Fluid Structure Interaction ◽  
Local Concentration ◽  
Dynamic Force ◽  
Arbitrary Lagrangian Eulerian ◽  
Number Range ◽  
Fluid Structure ◽  
Modeling And Analysis ◽  
Mixing Performance ◽  
Structure Interaction

Abstract A passive micromixer with obstacles in the form of deformable baffles is examined numerically. The model deploys an Arbitrary Lagrangian-Eulerian framework with Fluid-structure interaction coupled with a diffusion–advection model. Numerical analysis is carried out in the Reynolds number [Re] range of 0.01≤Re≤300. The objective of the present study is to enhance mixing between two component flow streams in a microchannel encompassing a deformable baffle. In the present work, the baffle deforms only due to the dynamic force of fluids. No external forces are applied. To exemplify the effectiveness of the present design, water and a suspension of curcumin drug loaded nanoparticles are taken as two fluids. Mixing index based on the variance of the local concentration of the suspension is employed to appraise the mixing performance of the micromixer. The introduction of the deformable baffle in a micromixer proliferates the mixing performance with minimal pressure drop over the tested Reynolds number range.

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