Application of Potential Theory to Steady Flow Past Two Cylinders in Tandem Arrangement

Table 1

Summary of spacing ratio ranges for single bluff body and reattachment flow patterns behind two tandem circular cylinders.

Author	Cylinder diameter: 𝑑, 𝐷	Re	(𝐿/𝐷)I	(𝐿/𝐷)II
Igarashi [1]	𝑑=𝐷	8700--5.2×10^4	1.03–1.91	2.09–3.53
Zdravkovich [11]	𝑑=𝐷	Not given	1–1.2~1.8	1.2~1.8–3.4~3.8
Ljungkrona and Sundén [3]	𝑑=𝐷	(1.0--1.2)×10^4	1.25	2.0, 4.0
Xu and Zhou [6]	𝑑=𝐷	800--4.2×10^4	1.0–2.0	2.0–3.0
Zhou and Yiu [7]	𝑑=𝐷	7000	1.3	2.5, 4.0
Gao et al. [16]	𝑑<𝐷	1200–4800	1.2	2.4

(𝐿/𝐷)_I: centre-to-centre spacing ratio range for single bluff body pattern.
(𝐿/𝐷)_II: centre-to-centre spacing ratio range for reattachment flow pattern.