Mass Flow Inlet BC
I am new to SU2 and trying to figure out how to make it work for my problem. Navier-Stokes, laminar, compressible.
I would like to specify inlet and outlet boundary conditions on a volume defined by everywhere else by wall and symmetry boundary conditions. The outlet bc is pressure which falls under the standard syntax: MARKER_OUTLET = (Outlet, pressure) However, for the inlet bc, I would like to specify a mass flow rate being injected in the +Z direction. I am unable to figure out how to do this - could anyone point me to an tutorial/documentation. Based on the Users Guide-Configuration file documentation, it would seem like I need to use a combination of MARKER_INLET (to specify inlet surface and flow direction) and MARKER_FLOWLOAD or MARKER_LOAD to specify mass flow rate (kg/sec). However, MARKER_INLET requires specification of pressure (and temperature) and MARKER_FLOWLOAD/MARKER_LOAD do not accept specification of direction. So my questions are: 1. Do I use MARKER_FLOWLOAD or MARKER_LOAD to specify the inlet? Or do I have it completely wrong and need to approach this differently? 2. How do I specify the direction of flow at the inlet? Thanks for any help. |
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% % Inlet boundary type (TOTAL_CONDITIONS, MASS_FLOW) INLET_TYPE= MASS_FLOW % % 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= ( boundary_marker, density, velo_mag, 1, 0, 0 ) |
Thanks taxalian.
Quick follow up question - by requiring density and velocity at the inlet, we are essentially defining a pressure (I am working with an ideal gas) at the inlet which (in conjuction with outlet pressure bc) seems like over-constraining of the problem. Following your post, I did a 'grep -ilr "MASS_FLOW" TestCases' to find a tutorial that discussed had the MASS_FLOW version of the inlet boundary condition but came up with no matches. Neither did I find any details about it in the configuration-file section of the Users manual - is there some documentation I am missing? I also have a question about the suitability of SU2 to the problem I am trying to solve, but will post a separate thread for that. |
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Well their is slight description available about the bc here: http://adl.stanford.edu/docs/display...iguration+file Additionally, consult the "config_template.cfg" in your /trunk folder. It should give you enough information. |
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Alternatively, may be the use of: INLET_TYPE= TOTAL_CONDITIONS MARKER_INLET= ( boundary_marker, total temp, total pressure, 1, 0, 0 ) |
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