2021 Fiscal Year Final Research Report
Local Mesh Refinement for Flow Analysis with Isogeometric Discretization and Topology Change
| Project/Area Number |
20K22401
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| Research Category |
Grant-in-Aid for Research Activity Start-up
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| Allocation Type | Multi-year Fund |
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| Review Section |
0301:Mechanics of materials, production engineering, design engineering, fluid engineering, thermal engineering, mechanical dynamics, robotics, aerospace engineering, marine and maritime engineering, and related fields
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| Research Institution | Waseda University |
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Principal Investigator |
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| Project Period (FY) |
2020-09-11 – 2022-03-31
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| Keywords | ST-SI-TC-IGA / T-spline / 心臓弁流体解析 |
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| Outline of Final Research Achievements |
The fluid mechanics associated with contact between moving interfaces is challenging. The challenge is caused by the topology change computational domain. We use the moving-mesh method to represent the boundary layer near the contact surfaces accurately. We refine the mesh locally by using T-splines to have the desired accuracy. We have applied the method to artificial heart valve flow analysis, a cardiovascular fluid-structure interaction problem. The flow solution was high accuracy near the leaflet surfaces even when they came into the contact.
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| Free Research Field |
計算工学
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| Academic Significance and Societal Importance of the Research Achievements |
物体同士が接触する中での流れ場は，観測することが難しく，数値解析においても接触による空間の変化を正確に捉えることが求められ難しい．本研究は物体同士の接触を伴う流体現象を解析することの出来る解析手法を，幅広い問題に適用可能で，効率良いものにする．本研究での実問題への適用例として選んだ心臓弁は心臓でも疾患の発症の多い部分であり，複雑な動作や形状，接触という問題から周囲の流体場を把握するのが難しい例である．そうした例に対しても周囲の流体場を把握することができる．
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