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<p>The unique riverbed profiles and bending reaches of the more than 2000-year-old Dujiangyan Irrigation System (DIS) guarantee relatively stable water supply to the Chengdu Plain, China, with minimal sediment. Similarly, the human aorta buffers the cardiac-induced pulsatile flow through Windkessel effect and reduces the thrombus transport to cerebral vessels through swirling effect of blood flow. This study employs computational simulations and <i>in vitro</i> experiments to analyze the shared hydrodynamic principles between both systems. A three-dimensional (3D) model of the Inner River of DIS was constructed based on data obtained with large-scale prototype observation system. In parallel, 3D aorta models were reconstructed based on medical images, incorporating lumped parameter models as boundary conditions. Both flow pulsatility and helicity-dependent mass transport (sediment in DIS vs. thrombus in aorta) were quantitatively compared. The results have, for the first time, confirmed the amazing similarities in flow characteristics between the DIS and human aorta. The findings provide novel insights for advancing aortic disease therapies and endovascular device design, while opening new perspectives for addressing challenges in flood and sediment management.</p>

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Study on the hydrodynamic similarities between Dujiangyan, an ancient Chinese irrigation system, and human aorta

  • 期刊论文

  • 发表日期：

    2026年8月5日

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  • Yuheng Yang,
  • Xiaoning Zhang,
  • Hongyan Kang,
  • Zengsheng Chen,
  • Xiaoyan Deng,
  • Yubo Fan,
  • Anqiang Sun

摘要

The unique riverbed profiles and bending reaches of the more than 2000-year-old Dujiangyan Irrigation System (DIS) guarantee relatively stable water supply to the Chengdu Plain, China, with minimal sediment. Similarly, the human aorta buffers the cardiac-induced pulsatile flow through Windkessel effect and reduces the thrombus transport to cerebral vessels through swirling effect of blood flow. This study employs computational simulations and in vitro experiments to analyze the shared hydrodynamic principles between both systems. A three-dimensional (3D) model of the Inner River of DIS was constructed based on data obtained with large-scale prototype observation system. In parallel, 3D aorta models were reconstructed based on medical images, incorporating lumped parameter models as boundary conditions. Both flow pulsatility and helicity-dependent mass transport (sediment in DIS vs. thrombus in aorta) were quantitatively compared. The results have, for the first time, confirmed the amazing similarities in flow characteristics between the DIS and human aorta. The findings provide novel insights for advancing aortic disease therapies and endovascular device design, while opening new perspectives for addressing challenges in flood and sediment management.