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BC_inlet with NEMO

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Old   July 21, 2022, 11:43
Default BC_inlet with NEMO
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Jesus Arias
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Hello all.

I am relatively new to SU2 and I was hoping to find some info on the NEMO solver with a BC_inlet condition.

I would like to solve a reacting flow where I define a fuel injector inlet condition using

Code:
MARKER_INLET= (injector, 300, 19.988, 0.04362156, 0.9990481, 0.0 )
MARKER_INLET_SPECIES= (injector, 1.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0 )
When trying to execute I get an error message that says

Code:
"BC_INLET: Not operational in NEMO."
Are there any plans currently to implement inlet BCs for NEMO? I looked through the code base and saw that BC_inlet and BC_supersonic_inlet are disabled with NEMO. Otherwise is there some kind of workaround to define an injector with a different inlet condition/composition while using NEMO? I tried using the feature_NEMO_turb branch of SU2 but got a segfault.

Thanks!
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Old   July 21, 2022, 14:39
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Wally Maier
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Hi Jarias,

Unfortunately the inlet conditions are not yet available in SU2-NEMO. The species inlet is only for incompressible flow (there are two-separate multi-species developments happening in SU2).

That being said, your timing is impeccable. This topic recently came up and we do plan to add these capabilities into NEMO. Ill go ahead and start the development.
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Old   July 22, 2022, 05:34
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bigfoot
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Hi,
Besides the NEMO project, which focusses on compressible flow, we are working on an incompressible reacting flow solver based on the flamelet approach (tabulated chemistry). We are currently trying to merge all our developments into the main version of SU2, much of the development is still in a feature branch (feature_flamelet).
If you can tell a little bit more about the case you would like to simulate, we can tell you if the flamelet branch is something you could use (incompressible, premixed, partially premixed or nonpremixed, turbulent, heat losses, etc.)
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Old   July 22, 2022, 11:17
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Jesus Arias
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Hi bigfoot,

There were two cases we were interesting in looking at, that being a scramjet similar to the work by Peterson https://arc.aiaa.org/doi/10.2514/6.2020-0875, and then another case of a rocket nozzle with combustion products in the flow. I figured since the Mach > 1 that NEMO coupled to mutation++ would be our best bet.
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Old   July 22, 2022, 15:10
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bigfoot
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Hi,



Yes, these testcases are better handled by NEMO, so that means you'll have to wait for the implementation of wallym, or maybe you can participate in the development over github (not sure how much work it is and how much time wallym has available). It would be interesting to see the results.
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Old   August 21, 2022, 16:47
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Zaid Paloba
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hello. Try using
MARKER_FAR= (injector)
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Old   August 22, 2022, 14:12
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Wally Maier
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Hi ZaidPaloba,

Unfortunately, MARKER_FAR will only initialize the flow to the freestream conditions, and not to the desired injector values.
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