未解决的红细胞:CFD-DEM模拟血流与可变形细胞的升级策略
Carmine Porcaro1, Mahdi Saeedipour1
1Department of Particulate Flow Modelling, Johannes Kepler University, A-4040 Linz, Austria; Linz Institute of Technology (LIT), Johannes Kepler University, A-4040 Linz, Austria.
Computers in biology and medicine
|August 29, 2024
概括
本研究介绍了一种扩大规模的方法,用于模拟红细胞 (RBC) 流动,使用计算流体动力学和离散元素方法 (CFD-DEM). 它通过开发细胞流体相互作用的新模型,使高效的大规模血流模拟成为可能.
科学领域:
- 计算流体动力学 (CFD) 是一种计算流体动力学.
- 生物医学工程 生物医学工程
- 多相流量模拟多相流量模拟
背景情况:
- 由于其多相性质,血流模拟是复杂的.
- 现有的方法如单相近似缺乏准确性,而细胞级模拟在计算上昂贵且规模有限.
- 液体粒子相互作用的具体模型,特别是可变形红细胞 (RBC),是需要准确的大规模模拟.
研究的目的:
- 开发一种扩大规模的方法来模拟细胞水平的血液流动.
- 在CFD-DEM框架内创建对可变形RBCs起作用的拉力和提升力的准确模型.
- 为了能够高效地模拟大规模道中的数十万个RBC.
主要方法:
- 在未解决的CFD-DEM技术中使用了扩展方法.
- 根据细胞层次的模拟数据,在RBC上导出了拖拉和提升力的新方程.
- 验证和验证了模拟大规模通道血液流动的开发模型.
主要成果:
- 在大型通道中成功模拟了高达50万个红细胞的血液流动.
- 与传统的细胞级模拟相比,拟议的方法提供了较少的计算力度.
- 衍生的力模型为宏观血流特征提供了令人满意的结果.
结论:
- 扩展CFD-DEM方法与新的红细胞力模型在大规模血流模拟中是有效的.
- 这种方法平衡了计算效率与RBC行为的准确表示.
- 未来的工作将集中在完善模型,包括粒子对粒子相互作用.
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