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Fluid-structure interaction analysis in microfluidic devices: A dimensionless finite element approach

Afrasiab, H ; Sharif University of Technology | 2012

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  1. Type of Document: Article
  2. DOI: 10.1002/fld.2592
  3. Publisher: 2012
  4. Abstract:
  5. In this paper, the so-called small time-step instability in finite element simulation of the fluid part is considered in fluid-structure interaction (FSI) problems in which a high-frequency vibrating structure interacts with an incompressible fluid. Such a situation is common in many microfluid manipulating devices. A treatment has been proposed that uses the dimensionless set of FSI governing equations in order to scale up the problem time step to a proper level that precludes the potential small time-step instability. Two-dimensional and three-dimensional finite element simulations of a mechanical micropumping device are performed to verify the efficiency of the presented approach. Solid structure vibrations of high frequency and nano-scale amplitude are used to derive the fluid flow in this kind of micropump. Results of FEM simulations are in good agreement with experimental data. The fluid problem is formulated and solved in arbitrary Lagrangian-Eulerian description
  6. Keywords:
  7. Finite element simulation ; Small time instability ; Arbitrary Lagrangian Eulerian ; Arbitrary Lagrangian Eulerian method ; Experimental data ; FEM simulations ; Finite element simulations ; Finite-element approach ; Fluid problem ; Governing equations ; High frequency ; High frequency HF ; Incompressible fluid ; Micro pump ; Micro-fluid ; Microfluidic devices ; Micropumping ; Nano scale ; Scale-up ; Solid structures ; Three dimensional finite elements ; Time step ; Vibrating structures ; Fluid structure interaction ; Fluidic devices ; Thermal barrier coatings ; Finite element method
  8. Source: International Journal for Numerical Methods in Fluids ; Volume 68, Issue 9 , 2012 , Pages 1073-1086 ; 02712091 (ISSN)
  9. URL: http://onlinelibrary.wiley.com/doi/10.1002/fld.2592/abstract