[taalf]

Hello,

I would like to set a mass flow inlet with a given temperature. Is it possible in SU2?

In the trunk/config_template.cfg, there is:

% Inlet boundary type (TOTAL_CONDITIONS, MASS_FLOW)
INLET_TYPE= TOTAL_CONDITIONS
%
% Inlet boundary marker(s) with the following formats (NONE = no marker) 
% Total Conditions: (inlet marker, total temp, total pressure, flow_direction_x, 
%           flow_direction_y, flow_direction_z, ... ) where flow_direction is
%           a unit vector.
% Mass Flow: (inlet marker, density, velocity magnitude, flow_direction_x, 
%           flow_direction_y, flow_direction_z, ... ) where flow_direction is
%           a unit vector.
MARKER_INLET= ( NONE )
%

So, it seems one has to choose between mass flow inlet without temperature and stagnation inlet with temperature.

Is this like this?

Thanks!

Best regards,

William

[hlk]

Originally Posted by taalf

Hello,

I would like to set a mass flow inlet with a given temperature. Is it possible in SU2?

In the trunk/config_template.cfg, there is:

% Inlet boundary type (TOTAL_CONDITIONS, MASS_FLOW)
INLET_TYPE= TOTAL_CONDITIONS
%
% Inlet boundary marker(s) with the following formats (NONE = no marker) 
% Total Conditions: (inlet marker, total temp, total pressure, flow_direction_x, 
%           flow_direction_y, flow_direction_z, ... ) where flow_direction is
%           a unit vector.
% Mass Flow: (inlet marker, density, velocity magnitude, flow_direction_x, 
%           flow_direction_y, flow_direction_z, ... ) where flow_direction is
%           a unit vector.
MARKER_INLET= ( NONE )
%

So, it seems one has to choose between mass flow inlet without temperature and stagnation inlet with temperature.

Is this like this?

Thanks!

Best regards,

William

Thank you for your question.
The mass flow rate inlet condition enforces the specified mass flow rate. Other properties are determined from the flow solution, and updated as the iterations proceed. Enforcing the temperature as well as the mass flow rate would be nonphysical for a subsonic inlet because information propagating from downstream changes the flow state at the inlet.

[kei714]

Hi,

I want to set a inlet boundary condition with mass flow and pressure like ansys fluent.

Your consideration of my request would be greatly appreciated.
or could you tell me how to implement it?

[hlk]

Originally Posted by kei714

Hi,

I want to set a inlet boundary condition with mass flow and pressure like ansys fluent.

Your consideration of my request would be greatly appreciated.
or could you tell me how to implement it?

In order to make modifications to the boundary conditions, you will want to first download and install from the source code (if you are currently using the binaries/executables). Once you have that working, start making modifications to the code in SU2_CFD/src/solver_direct_mean.cpp. The specific methods to modify will look like CEulerSolver::BC_Inlet, etc.
If you want this functionality alongside the current boundary conditions, you may also want to make modifications to the Common/src/config_structure.cpp and associated files to be able to control which inlet type via the config file.

Caveats if you are just starting out with learning to code/compile C++ and/or are using Windows:
I strongly recommend doing this on a linux or Apple operating system - it is much, much harder to do this on a Windows operating system. Linux operating systems are generally free and can be used on a windows machine via virtual machines or a partition. I also recommend using an IDE such as XCode or Eclipse to make code navigation easier.