多个快速发射的外体的流体动力学:快速的外体
Addie Harrison1, Wanda Strychalski2, Christina Hamlet3
1Department of Mathematics, University of Arizona, Tucson, USA. addieharrison@arizona.edu.
Bulletin of mathematical biology
|June 23, 2025
概括
超快速的挤出体,就像水母体内囊一样,克服了微观液体挑战. 多个杆子表现出复杂的流体动力学,中心杆子可靠地以高速度击中猎物.
科学领域:
- 生物物理学的生物物理.
- 流体动力学 流体动力学
- 细胞生物学 细胞生物学
背景情况:
- 流体中的微观相互作用由粘度和边界层主导,使细胞接触变得困难.
- 各种生物体中的超快速挤出性有机体 (外体),如水母脑膜囊,通过快速发射来克服这些挑战.
- 之前的研究集中在单个突体的发射;多个突体的流体动力学仍未得到充分研究.
研究的目的:
- 在数值上模拟多个同时或顺序发射的状结构 (外体) 的流体动力学.
- 为了研究不同雷诺兹数对外动物与猎物的相互作用的影响.
- 了解控制多个挤出体发射成功的物理机制.
主要方法:
- 使用沉浸边界方法进行二维数值模拟.
- 模拟了一个,两个和三个加速棒状结构向被动弹性猎物释放的动态.
- 在数量级上对雷诺兹数进行了变化,以覆盖生物学上相关的火速和流体条件.
主要成果:
- 猎物距离和雷诺兹数之间存在一种非单调的关系,用于同时发射的刺刀.
- 在较高的雷诺兹数下,边界效应不那么显著,允许直接影响猎物.
- 在较低的雷诺兹数下,螺杆的流体携带增加了它们的范围.
- 中心棒始终以最高的雷诺兹数击中猎物,无论射击顺序或距离.
结论:
- 微观的流体动力学高度非线性,导致复杂的相互作用.
- 多个挤出式射击策略可能是有效的,中心棒显示强度.
- 了解这些流体动力学对于理解生物系统中的挤出体功能至关重要.
相关概念视频
Cell Motility through Blebbing
2.0K
Blebs are a type of membrane protrusion formed by the internal hydrostatic pressure of the cytoplasm. Blebs are observed in several cell types, including fibroblasts, immune cells, and single-celled organisms like the amoeba. The primary function of blebs is cell locomotion and apoptosis, but they are also found during necrosis and cell division. The life cycle of a bleb comprises an initiation phase followed by the expansion and retraction phases.
Blebbing Through the Matrix
In multicellular...
Blebbing Through the Matrix
In multicellular...
2.0K
Mechanism of Filopodia Formation
2.5K
Filopodia are thin, actin-rich cellular protrusions that play an important role in many fundamental cellular functions. They vary in their occurrence, length, and positioning in different cell types, suggesting their diverse roles.
Their main function is to guide migrating cells during normal tissue morphogenesis or cancer metastasis by recognizing and making initial contacts with the extracellular matrix. However, they can also act as stationary cell anchors or help to establish communication...
Their main function is to guide migrating cells during normal tissue morphogenesis or cancer metastasis by recognizing and making initial contacts with the extracellular matrix. However, they can also act as stationary cell anchors or help to establish communication...
2.5K


