Abstract
In the current work, newly-developed MD-QCT reaction and relaxation databases forinteral energy relaxation nitrogen are implemented in DSMC simulations for 0D heat bathcases. In particular, two-dimensional coarse-grained binning method is used to treat thediscrete internal states of N2 in groups, and it is found that the convergence of bin-basedrelaxation cross sections to state-specific relaxation cross sections is good with approxi-mately 10 bins in the rotational and vibrational modes (99 bins in total). In the 0D heatbath cases for N-N2 relaxation, it is found that Tr relaxes faster than Tv at relatively lowtemperature and at a very similar rate as Tv at relatively high temperature. However, the Zr obtained from DSMC are smaller than those obtained directly using the MD method by a factor between 1.3 and 5 at various temperatures, and the Zv are smaller by a factorof around 6. For N2-N2 relaxations, Zr and Zv are different even at very high Tt, and the Zr and Zv obtained from DSMC are smaller than those obtained directly using the MD method by approximately one order of magnitude.
| Original language | English (US) |
|---|---|
| Title of host publication | 45th AIAA Thermophysics Conference |
| Publisher | American Institute of Aeronautics and Astronautics Inc, AIAA |
| Pages | 1-14 |
| Number of pages | 14 |
| ISBN (Print) | 9781624103612 |
| State | Published - Jan 1 2015 |
| Externally published | Yes |
| Event | 45th AIAA Thermophysics Conference, 2015 - Dallas, United States Duration: Jun 22 2015 → Jun 26 2015 |
Publication series
| Name | 45th AIAA Thermophysics Conference |
|---|
Other
| Other | 45th AIAA Thermophysics Conference, 2015 |
|---|---|
| Country | United States |
| City | Dallas |
| Period | 6/22/15 → 6/26/15 |
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ASJC Scopus subject areas
- Aerospace Engineering
- Mechanical Engineering
Cite this
State specific modeling of energy transfer in nitrogen shocks using high fidelity models. / Zhu, Tong; Li, Zheng; Parsons, Neal; Levin, Deborah A.; Pane, Marco.
45th AIAA Thermophysics Conference. American Institute of Aeronautics and Astronautics Inc, AIAA, 2015. p. 1-14 (45th AIAA Thermophysics Conference).Research output: Chapter in Book/Report/Conference proceeding › Conference contribution
}
TY - GEN
T1 - State specific modeling of energy transfer in nitrogen shocks using high fidelity models
AU - Zhu, Tong
AU - Li, Zheng
AU - Parsons, Neal
AU - Levin, Deborah A.
AU - Pane, Marco
PY - 2015/1/1
Y1 - 2015/1/1
N2 - In the current work, newly-developed MD-QCT reaction and relaxation databases forinteral energy relaxation nitrogen are implemented in DSMC simulations for 0D heat bathcases. In particular, two-dimensional coarse-grained binning method is used to treat thediscrete internal states of N2 in groups, and it is found that the convergence of bin-basedrelaxation cross sections to state-specific relaxation cross sections is good with approxi-mately 10 bins in the rotational and vibrational modes (99 bins in total). In the 0D heatbath cases for N-N2 relaxation, it is found that Tr relaxes faster than Tv at relatively lowtemperature and at a very similar rate as Tv at relatively high temperature. However, the Zr obtained from DSMC are smaller than those obtained directly using the MD method by a factor between 1.3 and 5 at various temperatures, and the Zv are smaller by a factorof around 6. For N2-N2 relaxations, Zr and Zv are different even at very high Tt, and the Zr and Zv obtained from DSMC are smaller than those obtained directly using the MD method by approximately one order of magnitude.
AB - In the current work, newly-developed MD-QCT reaction and relaxation databases forinteral energy relaxation nitrogen are implemented in DSMC simulations for 0D heat bathcases. In particular, two-dimensional coarse-grained binning method is used to treat thediscrete internal states of N2 in groups, and it is found that the convergence of bin-basedrelaxation cross sections to state-specific relaxation cross sections is good with approxi-mately 10 bins in the rotational and vibrational modes (99 bins in total). In the 0D heatbath cases for N-N2 relaxation, it is found that Tr relaxes faster than Tv at relatively lowtemperature and at a very similar rate as Tv at relatively high temperature. However, the Zr obtained from DSMC are smaller than those obtained directly using the MD method by a factor between 1.3 and 5 at various temperatures, and the Zv are smaller by a factorof around 6. For N2-N2 relaxations, Zr and Zv are different even at very high Tt, and the Zr and Zv obtained from DSMC are smaller than those obtained directly using the MD method by approximately one order of magnitude.
UR - http://www.scopus.com/inward/record.url?scp=84959338999&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84959338999&partnerID=8YFLogxK
M3 - Conference contribution
AN - SCOPUS:84959338999
SN - 9781624103612
T3 - 45th AIAA Thermophysics Conference
SP - 1
EP - 14
BT - 45th AIAA Thermophysics Conference
PB - American Institute of Aeronautics and Astronautics Inc, AIAA
ER -