| Project/Area Number |
22K14184
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| Research Category |
Grant-in-Aid for Early-Career Scientists
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| Allocation Type | Multi-year Fund |
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| Review Section |
Basic Section 19010:Fluid engineering-related
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| Research Institution | Okinawa Institute of Science and Technology Graduate University |
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Principal Investigator |
VARCHANIS Stylianos 沖縄科学技術大学院大学, マイクロ・バイオ・ナノ流体ユニット, ポストドクトラルスカラー (30913462)
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| Project Period (FY) |
2022-04-01 – 2024-03-31
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| Project Status |
Completed (Fiscal Year 2023)
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| Budget Amount *help |
¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
Fiscal Year 2023: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2022: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
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| Keywords | Viscoelastic / FSI / Flow instability / Porous media / Microfluidics |
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| Outline of Research at the Start |
In this project, the applicant will develop a new, fully consistent, and highly stable Finite Element formulation for the simulation of the flow and interaction of viscoelastic fluids with elastic structures. This will be the first numerical method that will address the multiphysics coupling between the laws that describe non-Newtonian fluid dynamics and structural mechanics. The algorithm will be employed to study the underlying physics in a problem that arises in microscale biological processes: the 3-dimensional viscoelastic flow past a single or an array of deformable elastic posts.
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| Outline of Annual Research Achievements |
We simulated the base case for increasing flow rates (Weissenberg number) to explore the response of the system. We found that a Hopf bifucartion drives the system from steady to time-dependent states. We performed a parametric study regarding the extensibility of polyner solution and the elastic modulus of the solid. Low polymer extensibility and high solid elastic modulus suppress time dependent states. We also studied the effect of the blockage ratio, aspect ratio, and angles of attack. We find that time dense fiber beds promote time-dependent states. In all cases we derived an apparent permeability coefficient (Darcy-like law) and a slip length.
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