Implementation of Field Velocity Approach for URANS Gust Simulations

[gsivanii]

Hi everyone,

I am planning to set up a URANS simulation in SU2 to analyze gust effects on an airfoil. I want to use the Field Velocity Approach, following the mathematical formulation by Sitaraman and Baeder ("Field Velocity Approach and Geometric Conservation Law for Unsteady Flow Simulations").

Could anyone guide me on how to implement or activate this in SU2? Specifically:

1. Are there built-in config options (GUST_TYPE, etc.) that utilize this specific FVM / grid-velocity modification formulation?
2. If it requires custom implementation, which source files/solvers should I look into to introduce the gust velocity component?

Thanks in advance for any insights!

[bigfooted]

There are some gust examples in the Testcases subdirectory and the explanation of the keywords is in config_template.cfg. Is your approach different from the current implementation?

% --------------------------- GUST SIMULATION ---------------------------------%
%
% Apply a wind gust (NO, YES)
WIND_GUST = NO
%
% Type of gust (NONE, TOP_HAT, SINE, ONE_M_COSINE, VORTEX, EOG)
GUST_TYPE = NONE
%
% Direction of the gust (X_DIR, Y_DIR or Z_DIR)
GUST_DIR = Y_DIR
%
% Gust wavelenght (meters)
% Note for 1-cos gusts: this is the full gust length, not the gust gradient H (half gust length) as used for example in CS-25.
GUST_WAVELENGTH= 10.0
%
% Number of gust periods
GUST_PERIODS= 1.0
%
% Gust amplitude (m/s)
GUST_AMPL= 10.0
%
% Time at which to begin the gust (sec)
GUST_BEGIN_TIME= 0.0
%
% Location at which the gust begins (meters) */
GUST_BEGIN_LOC= 0.0

[gsivanii]

Thank you! I checked the source code and verified that the built-in gust options natively implement the Field Velocity Method.