Table 3 Optimization results for drag increase rate \(\varepsilon_{tf}\).

From: Drag enhancement characteristics and mechanism of the seam plate formed by uniform micro gap arrangement of multiple micro cylinders

Group

Microcylinder diameter/μm

Gap to diameter ratio

Flow velocity/m·s−1

Drag increase rate

1

58

0.6

0.50

32.44

2

54

0.6

0.50

31.84

3

51

0.6

0.50

31.20

4

47

0.7

0.50

30.24

5

41

0.7

0.50

29.22

6

37

0.8

0.50

28.75

7

30

0.9

0.50

27.99

8

26

0.9

0.50

27.70

9

22

1.0

0.50

27.56

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