Turn on Turbulence model at certain coordinate

Kelvin Ng · October 19, 2015, 10:52

Hi all,

I am new user of SU2 . Recently i run a few simulation with turbulence model. Now , i would like to try to turn on the turbulence model in certain place , that it can calculate laminar flow at point before transition of turbulence, so

1) How can i turn on turbulence model in certain coordinate?

2) How can i obtain information of mesh ( coordinate ) ? so i can try to write a python script to control it .

Thanks.

All the best.

avar · October 30, 2015, 15:19

Unfortunately trip terms ( to trip the flow from laminar to turbulent at a grid point) have not been implemented in the solver (turbulence models) yet. However the original SA model formulation (the original AIAA paper by Spalart in 1992) contains the definition of the trip terms and you could try adding them to the code.

fpalacios · October 31, 2015, 10:19

If you are interested on that implementation, the right place to look at is

void CSourcePieceWise_TurbSA::ComputeResidual(su2double *val_residual, su2double **val_Jacobian_i, su2double **val_Jacobian_j, CConfig *config)
in numerics_direct_turbulence.cpp

Feel free to work on that implementation and post your feedback or questions.

Thanks for using SU2,

Best,
Francisco

PS.- Another interesting subroutine is
void CTurbSASolver::Source_Residual(CGeometry *geometry, CSolver **solver_container, CNumerics *numerics, CNumerics *second_numerics, CConfig *config, unsigned short iMesh)
in solver_direct_turbulent.cpp

October 19, 2015, 10:52	Turn on Turbulence model at certain coordinate	#1
Kelvin Ng New Member NG YIN CHEANG Join Date: Mar 2014 Posts: 3 Rep Power: 12	Hi all, I am new user of SU2 . Recently i run a few simulation with turbulence model. Now , i would like to try to turn on the turbulence model in certain place , that it can calculate laminar flow at point before transition of turbulence, so 1) How can i turn on turbulence model in certain coordinate? 2) How can i obtain information of mesh ( coordinate ) ? so i can try to write a python script to control it . Thanks. All the best.

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October 30, 2015, 15:19		#2
avar New Member Join Date: May 2015 Posts: 4 Rep Power: 11	Unfortunately trip terms ( to trip the flow from laminar to turbulent at a grid point) have not been implemented in the solver (turbulence models) yet. However the original SA model formulation (the original AIAA paper by Spalart in 1992) contains the definition of the trip terms and you could try adding them to the code.

October 31, 2015, 10:19		#3
fpalacios Super Moderator Francisco Palacios Join Date: Jan 2013 Location: Long Beach, CA Posts: 404 Rep Power: 15	If you are interested on that implementation, the right place to look at is void CSourcePieceWise_TurbSA::ComputeResidual(su2double val_residual, su2double val_Jacobian_i, su2double val_Jacobian_j, CConfig config) in numerics_direct_turbulence.cpp Feel free to work on that implementation and post your feedback or questions. Thanks for using SU2, Best, Francisco PS.- Another interesting subroutine is void CTurbSASolver::Source_Residual(CGeometry geometry, CSolver solver_container, CNumerics numerics, CNumerics second_numerics, CConfig config, unsigned short iMesh) in solver_direct_turbulent.cpp