Flow Patterns Around Staggered Square Cylinders Across Reynolds Numbers

Featuring results from a two-dimensional numerical study of fluid flow around staggered rows of identical square cylinders. The analysis covers Reynolds numbers from 20 to 140 and gap spacings between cylinders from 1 to 6, using the lattice Boltzmann method for computations. It documents transitions between synchronous, quasi-periodic, and chaotic flow patterns.

Use Cases

• Analyze the relationship between critical Reynolds number for vortex shedding onset and gap spacing (g) between cylinders.
• Model the transition from synchronous to chaotic flow patterns as a function of Reynolds number (Re).
• Study the influence of gap spacing (g) on primary vortex shedding frequency and secondary cylinder interaction frequency.
• Investigate the weakening of wake interactions behind cylinders at large gap spacings (g) and high Reynolds numbers (Re).
• Examine the phase characteristics (in-phase, anti-phase) of consecutive cylinders in synchronous flow patterns.

Strengths

• Numerical study covers a defined parameter space: Reynolds numbers from 20 to 140 and gap spacings from 1 to 6.
• Identifies specific critical conditions, such as g=2 being the critical gap spacing for the considered Reynolds number range.
• Documents distinct flow pattern regimes: synchronous, quasi-periodic-I, quasi-periodic-II, and chaotic.

Limitations

• Data is derived from a numerical simulation (2D lattice Boltzmann method), not physical experimental measurements.
• The scope is limited to specific geometric (square cylinders, staggered rows) and parametric (Re ≤ 140, g ≤ 6) conditions.
• Sample data and underlying raw data files (e.g., velocity fields, force coefficients) are unavailable in the provided description.

Provenance

Source

Dryad

Collection Method

Two-dimensional numerical simulation using the lattice Boltzmann method.

Freshness

2020-06-24