Scholarlink

<p>Fluid flow around irregular cylinders that are widespread in nature and engineering deserves attention, and its hydrodynamic coefficients can be predicted by regular cylinders. For this purpose, the flow fields around seven regular cylinders and five irregular cylinders were analyzed via computational fluid dynamics simulations at low Reynolds numbers (90 ≤ <i>Re</i> ≤ 150). When the surrounding fluid flow is unstable, vortex shedding will occur behind both irregular cylinder and regular cylinder. No vortex shedding behind the cylinder with small Ar at low Reynolds number: the elliptical cylinder with <i>Ar</i> = 2/5 at <i>Re</i> ≤ 150; the elliptical cylinders with <i>Ar</i> = 3/5 at <i>Re</i> ≤ 120; Irregular cylinder 4 with <i>Ar</i> = 2/5 at <i>Re</i> ≤ 110. The drag coefficient curve of the irregular cylinder has a large peak and a small peak, and the lift coefficient curve of the irregular cylinder deviates from <i>C</i><sub><i>L</i></sub> = 0. Cylinders with the same geometric quantization parameters (<i>Ar</i>, area, and perimeter) have similar hydrodynamic characteristics.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Effects of irregular and regular geometric shape of cylinders on surrounding fluid flow

  • 期刊论文

  • 发表日期：

    2025年5月2日

查看全文
  • Xianfa Wei,
  • Haichun Ma,
  • Jiazhong Qian,
  • Jingping Wang,
  • Qiankun Luo,
  • Lei Ma

摘要

Fluid flow around irregular cylinders that are widespread in nature and engineering deserves attention, and its hydrodynamic coefficients can be predicted by regular cylinders. For this purpose, the flow fields around seven regular cylinders and five irregular cylinders were analyzed via computational fluid dynamics simulations at low Reynolds numbers (90 ≤ Re ≤ 150). When the surrounding fluid flow is unstable, vortex shedding will occur behind both irregular cylinder and regular cylinder. No vortex shedding behind the cylinder with small Ar at low Reynolds number: the elliptical cylinder with Ar = 2/5 at Re ≤ 150; the elliptical cylinders with Ar = 3/5 at Re ≤ 120; Irregular cylinder 4 with Ar = 2/5 at Re ≤ 110. The drag coefficient curve of the irregular cylinder has a large peak and a small peak, and the lift coefficient curve of the irregular cylinder deviates from CL = 0. Cylinders with the same geometric quantization parameters (Ar, area, and perimeter) have similar hydrodynamic characteristics.