| Summary: | 碩士 === 國立交通大學 === 機械工程系所 === 106 === In this paper, we simulate the swimming motion of micro swimmers in two dimension. We control the behavior of micro swimmers by UDF and make it oscillate periodically in a flow field. While in simulation, we take three parameters into account, frequency, angle of oscillating and the type of micro swimmers respectively. We use a dimensionless number to analysis the swimming efficiency of micro swimmers by try and error.
And we speculate the rupture of micro swimmers by the method that previous paper had done.
The simulation results show that Strouhal number will not be affected significantly by taking the frequency as the parameter. Increasing the angle of oscillating will decrease the number of Strouhal number, indicating a good efficiency with the micro swimmer. However, Strouhal number will start increasing when the angle of oscillating exceeds 70 degrees. By changing the type of micro swimmers, we find out that the longer the micro swimmer is, the lower the Strouhal number is. And type of 1L(N-1)S micro swimmers have a small Strouhal number.
In the prediction of rupture, we find out that fracture usually occurs at the tail of micro swimmers because the drag forces between the end two particles in micro swimmers are different obviously. And the drag force will reach maximum when the micro swimmers oscillate to 0 degrees because of the maximum angular speed.
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