Hybrid_RANSLES Options

Generated from SU2 commit 6b54b78464 on 2026-10-23. Do not edit this page. Edit the comment above the option in Common/src/CConfig.cpp instead.

WINDOW_START_ITER

Starting Iteration for windowing approach

More in config_template.cfg: Windowed output time averaging Time iteration to start the windowed time average in a direct run

WINDOW_FUNCTION

Window (weight) function for the cost-functional in the reverse sweep

More in config_template.cfg: Window used for reverse sweep and direct run. Options (SQUARE, HANN, HANN_SQUARE, BUMP) Square is default.

DES_CONST

DES Constant

More in config_template.cfg: DES Constant (0.65)

SBS_LENGTHSCALE_COEFF

SBS lengthscale coefficient

More in config_template.cfg: Backscatter lengthscale coefficient (0.1)

SBS_MAX_ITER_SMOOTH

Maximum number of smoothing iterations for SBS model.

More in config_template.cfg: Maximum number of smoothing iterations for SBS model (100)

SBS_TIMESCALE_COEFF

SBS timescale coefficient

More in config_template.cfg: Backscatter timescale coefficient (0.05)

SBS_INTENSITY_COEFF

SBS intensity coefficient

More in config_template.cfg: Backscatter intensity coefficient (1.0)

HYBRID_RANSLES

Specify Hybrid RANS/LES model

More in config_template.cfg: Specify Hybrid RANS/LES model (SA_DES, SA_DDES, SA_ZDES, SA_EDDES)

STOCHASTIC_BACKSCATTER

Specify if the Stochastic Backscatter Model must be activated

More in config_template.cfg: Stochastic Backscatter Model (NO, YES)

ENFORCE_LES

Specify if the LES mode must be enforced

More in config_template.cfg: Enforce LES mode in Hybrid RANS-LES Simulations (NO, YES)

SBS_SOURCE_NU_EQUATION

Specify if the stochastic source term must be included in the turbulence model equation

More in config_template.cfg: Include stochastic source in turbulence model equation (NO, YES)

SBS_SOURCE_DIAGNOSTICS

Enable diagnostics of the stochastic source term in Langevin equation.

More in config_template.cfg: Include diagnostics of the stochastic source term in Langevin equations (NO, YES)

SBS_RELAXATION_FACTOR

Relaxation factor for the stochastic source term (Stochastic Backscatter Model)

More in config_template.cfg: Relaxation factor for the stochastic source term in the main balance equations (0.0)

SBS_IN_BOX

Apply Stochastic Backscatter Model only in a bounded box

More in config_template.cfg: Apply Stochastic Backscatter Model only in a bounded box (NO, YES)

SBS_BOX_BOUNDS

Specify extents of box where Stochastic Backscatter Model is active

More in config_template.cfg: Bounds of the box where the Stochastic Backscatter Model is activated (x_min, x_max, y_min, y_max, z_min, z_max)

  • Type: fixed-size list of real numbers
  • Default: Not extracted; see the code.
  • In config_template.cfg: SBS_BOX_BOUNDS= (0.0, 0.0, 0.0, 0.0, 0.0, 0.0)
  • Mentioned in: Hybrid RANS/LES (DES)
  • Used in 1 test case file, for example: backwardStep.cfg (( -0.001, 0.025, -5000.0, 5000.0, -5000.0, 0.0375 ))
  • Code: CConfig.cpp line 3144

SBS_FD_LOWER_THRESHOLD

Shielding function lower threshold for application of Stochastic Backscatter Model

More in config_template.cfg: Shielding function lower threshold for application of Stochastic Backscatter Model (0.9)

LES_FILTER_WIDTH

Filter width for LES (if negative, it is computed based on the local cell size)

More in config_template.cfg: User-specified LES filter width (if negative, it is computed based on the local cell size, default -1.0)

ROE_LOW_DISSIPATION

Roe with low dissipation for unsteady flows

More in config_template.cfg: Roe Low Dissipation function for Hybrid RANS/LES simulations (FD, NTS, NTS_DUCROS)

COMPUTE_AVERAGE

Compute Average for unsteady simulations

MULTIPOINT_MACH_NUMBER

Multipoint design Mach number

More in config_template.cfg: Definition of multipoint design problems, this option should be combined with the the prefix MULTIPOINT in the objective function or constraint (e.g. MULTIPOINT_DRAG, MULTIPOINT_LIFT, etc.)

  • Type: used by the Python scripts only
  • In config_template.cfg: MULTIPOINT_MACH_NUMBER= (0.79, 0.8, 0.81)
  • Used in 2 test case files, for example: heated_cylinder.cfg ((0.79, 0.8, 0.81))
  • Code: CConfig.cpp line 3159

MULTIPOINT_WEIGHT

Multipoint design Weight

MULTIPOINT_AOA

Multipoint design Angle of Attack

  • Type: used by the Python scripts only
  • In config_template.cfg: MULTIPOINT_AOA= (1.25, 1.25, 1.25)
  • Used in 1 test case file, for example: heated_cylinder.cfg ((1.25, 1.25, 1.25))
  • Code: CConfig.cpp line 3165

MULTIPOINT_SIDESLIP_ANGLE

Multipoint design Sideslip angle

  • Type: used by the Python scripts only
  • In config_template.cfg: MULTIPOINT_SIDESLIP_ANGLE= (0.0, 0.0, 0.0)
  • Used in 1 test case file, for example: heated_cylinder.cfg ((0.0, 0.0, 0.0))
  • Code: CConfig.cpp line 3168

MULTIPOINT_TARGET_CL

Multipoint design target CL

  • Type: used by the Python scripts only
  • In config_template.cfg: MULTIPOINT_TARGET_CL= (0.8, 0.8, 0.8)
  • Used in 1 test case file, for example: heated_cylinder.cfg ((0.8, 0.8, 0.8))
  • Code: CConfig.cpp line 3171

MULTIPOINT_REYNOLDS_NUMBER

Multipoint design Reynolds number

  • Type: used by the Python scripts only
  • In config_template.cfg: MULTIPOINT_REYNOLDS_NUMBER= (1E6, 1E6, 1E6)
  • Used in 1 test case file, for example: heated_cylinder.cfg ((1E6, 1E6, 1E6))
  • Code: CConfig.cpp line 3174

MULTIPOINT_FREESTREAM_TEMPERATURE

Multipoint design freestream temperature

  • Type: used by the Python scripts only
  • In config_template.cfg: MULTIPOINT_FREESTREAM_TEMPERATURE= (288.15, 288.15, 288.15)
  • Used in 1 test case file, for example: heated_cylinder.cfg ((288.15, 288.15, 288.15))
  • Code: CConfig.cpp line 3177

MULTIPOINT_FREESTREAM_PRESSURE

Multipoint design freestream pressure

  • Type: used by the Python scripts only
  • In config_template.cfg: MULTIPOINT_FREESTREAM_PRESSURE= (101325.0, 101325.0, 101325.0)
  • Used in 1 test case file, for example: heated_cylinder.cfg ((101325.0, 101325.0, 101325.0))
  • Code: CConfig.cpp line 3180

MULTIPOINT_OUTLET_VALUE

Multipoint design for outlet quantities (varying back pressure or mass flow operating points).

  • Type: used by the Python scripts only
  • In config_template.cfg: MULTIPOINT_OUTLET_VALUE= (0.0, 0.0, 0.0)
  • Code: CConfig.cpp line 3183

MULTIPOINT_MESH_FILENAME

Multipoint mesh filenames, if using different meshes for each point

  • Type: used by the Python scripts only
  • In config_template.cfg: MULTIPOINT_MESH_FILENAME= (mesh_NACA0012_m79.su2, mesh_NACA0012_m8.su2, mesh_NACA0012_m81.su2)
  • Code: CConfig.cpp line 3186


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