2021 Fiscal Year Final Research Report
Formulation of Numerical Flow Analysis System for Floc-Forming Fluids Based on Population Balance Equations
| Project/Area Number |
19K04199
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Review Section |
Basic Section 19010:Fluid engineering-related
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| Research Institution | Osaka Electro-Communication University |
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Principal Investigator |
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| Project Period (FY) |
2019-04-01 – 2022-03-31
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| Keywords | 複雑流体 / ポピュレーションバランス方程式 / フロック / 構成モデル / 数値流体力学 |
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| Outline of Final Research Achievements |
A computational model for the flow analysis considering the flow-induced structure of the floc-forming fluid was developed. In this model, temporal change in the floc size distribution was computed by the population balance equation of the floc size, and the effective volume fraction of flocs was obtained from the floc size distribution. The viscosity and relaxation time of the system were evaluated by the Krieger-Dougherty model and a power law model, respectively to introduce into the White-Metzner type viscoelastic constitutive model. The developed model successively expressed the rheological characteristics of the nanofaber suspension. Furthermore, in order to investigate the applicability of this model to the analysis of complex flow fields, numerical simulations of two-dimensional merging flows were performed using a flow analysis program in which the flow calculation with the finite element method and the present model were coupled.
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| Free Research Field |
非ニュートン流体力学
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| Academic Significance and Societal Importance of the Research Achievements |
これまで，フロック形成流体の流動誘起構造と粘弾性を考慮した数値解析モデルは存在しなかったが，本モデルの開発により，フロックサイズ分布を考慮した数値流動解析が可能となった．これにより，フロック形成流体を用いた成形過程における流動誘起構造の解析を行い，機能性への影響を考慮した製造過程のシミュレーションを行うなどの，より高度な流動解析の可能性が示された．
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