初始角速度对小球在流动腔中运动影响的初步研究

发布时间：2018-05-25 09:12

本文选题：细胞 + 初始角速度　；参考：《天津大学》2012年硕士论文

【摘要】：本文基于流固耦合理论,采用C++程序调用Fluent软件和Ansys软件,模拟了有初始角速度230°/s的单个细胞在流动腔中的运动,分析了细胞受到初始角速度、流体作用力和重力的作用下在流动腔中的位移、转角及细胞的变形。论文主要研究了 1、假设计算时间步、自适应时间步及收敛步数之间的关系。本文计算中假设迭代步数为100步,以保证每个时间步的计算迭代均收敛,本文的计算时间步假设为5e-4s自适应时间步。 2、由于X方向初始角速度230°/s的影响,计算初始时间段内对X方向转角和Y方向位移引起一个振荡,影响时间范围不大,但是对X方向和Z方向的位移影响很小。 3、由于X方向初始角速度230°/s的影响,细胞在流动腔底部跳跃的现象没有改变,但是对跳跃的周期有影响,细胞跳跃周期时间更长。 4、细胞在流动腔底部发生跳跃现象后,初始转动角速度对Y方向位移有影响,对X方向和Z方向位移影响很小;初始转动角速度对X方向、Y方向和Z方向的转动角度影响很大。
[Abstract]:Based on the fluid-solid coupling theory, the motion of a single cell with an initial angular velocity of 230 掳/ s in the flow chamber is simulated by using C program to call Fluent and Ansys software, and the initial angular velocity of the cell is analyzed. Displacement, rotation angle and cell deformation in the fluid chamber under the action of fluid force and gravity. The paper mainly studies 1. Suppose the relationship among time step, adaptive time step and convergence step is calculated. In this paper, the number of iteration steps is assumed to be 100 steps to ensure the convergence of each iteration. The computational time step in this paper is assumed to be 5e-4s adaptive time step. 2. Because of the influence of the initial angular velocity of 230 掳/ s in the X direction, the oscillation of the rotation angle and the displacement in the Y direction in the initial time period is induced, but the influence range is not large, but the displacement in the X direction and Z direction is not affected very much. 3. Due to the influence of the initial angular velocity of 230 掳/ s in the X direction, the phenomenon of cell jumping at the bottom of the flow chamber is not changed, but it has an effect on the jump cycle, and the time of the cell jump cycle is longer. 4After the cell jumps at the bottom of the flow chamber, the initial rotational angular velocity has an effect on the Y direction displacement, but has little effect on the X direction and Z direction displacement, and the initial rotation angular velocity has a great effect on the X direction Y direction and Z direction rotation angle.
【学位授予单位】：天津大学
【学位级别】：硕士
【学位授予年份】：2012
【分类号】：O347;R312

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