BARC

problem statement

BARC addresses the high Reynolds number, external, unsteady flow around a stationary, sharp-edged rectangular cylinder, and the associated aerodynamic actions. The breadth (B) to depth (D) ratio is set equal to 5. Given the possible interest of Research Institutions and Industries operating in different fields of Engineering, BARC addresses both the numerical and experimental approaches.

aims

to deeply investigate one specific problem in the aerodynamics of bluff bodies;
to assess the consistency of wind tunnel measurements carried out in different facilities;
to assess the consistency of computational results obtained through different approaches;
to compare experimental and computational results;
to develop integrated procedures relying on both experimental and computational outcomes;
to develop Best Practices for experiments and computations.

REQUIREMENTS FOR THE MAIN SETUP

Common requirements for both wind tunnel tests and computational simulations:

Reynolds number: 2x10⁴ ≤ Re = U D/ν ≤ 6x10⁴
angle of incidence: α = 0°
turbulence intensity: I_u ≤ 0.01
spanwise length of the obstacle: L/D ≥ 3
radius of curvature of the model edges: R/D ≤ 0.05
sampling frequency: f_s D/U ≥ 8

SENSITIVITY ANALYSES

Common sensitivity analyses for both wind tunnel tests and computational simulations are suggested:

angle of incidence: α = 1°, 3°, 6°
Reynolds number: Re = 1x10³, 1x10⁴, 1x10⁵, 1x10⁶
turbulence intensity: I_u = 0.02, 0.05, 0.10

HOW TO CONTRIBUTE TO THE BENCHMARK

the participants should register on the BARC web page;
The detailed setup information and output data requests are reported in the documents
"Requests for Wind Tunnel Tests"
"Requests for Computational Simulations";
both setup information and output data are classified as "required" and "encouraged". Any further data can be provided by the participants;
the setup information and output data should be provided by the participants through the member upload area;
the database will be available to all participants for download, to allow comparison among results through the member download area;
published material not restricted by copyright can be shared among the participants through upload on the member area.