Redistribution of vibrational energy: Mechanisms and transition probabilities

Maninder S. Grover; Thomas E. Schwartzentruber

doi:10.2514/6.2018-1231

Redistribution of vibrational energy: Mechanisms and transition probabilities

Maninder S. Grover, Thomas E. Schwartzentruber

Aerospace Engineering and Mechanics

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

3 Scopus citations

Abstract

In this paper we present a molecular level study analyzing vibrational energy redistribution in a reacting nitrogen system due to N₂ + N collisions, N₂ + N exchange reactions, N₂ +N₂ collisions and N₂ +N₂ exchange reactions at T = 30000K, T = 20000K and T = 10000K. We see that probability distribution functions describing vibrational energy change due to N₂ + N and N₂ + N₂ collisions collisions peak at ∆ɛ_vib = 0eV and have a narrow distribution. We find that the probability distribution functions describing change in vibrational energy due to N₂ + N and N₂ + N₂ exchange reactions have a larger width than the probability distribution functions for collisions, indicating that exchange reactions are more efficient in redistributing vibrational energy than collisions. We also find that exchange reactions that cause a change in vibrational energy are likely to change the vibrational level of the the reaction product by multiple vibrational quantum levels when compared to the reactant. On the other hand collisions are more likely to change the vibrational quantum number by one.

Original language	English (US)
Title of host publication	AIAA Aerospace Sciences Meeting
Publisher	American Institute of Aeronautics and Astronautics Inc, AIAA
ISBN (Print)	9781624105241
DOIs	https://doi.org/10.2514/6.2018-1231
State	Published - 2018
Event	AIAA Aerospace Sciences Meeting, 2018 - Kissimmee, United States Duration: Jan 8 2018 → Jan 12 2018

Publication series

Name	AIAA Aerospace Sciences Meeting, 2018

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Other	AIAA Aerospace Sciences Meeting, 2018
Country/Territory	United States
City	Kissimmee
Period	1/8/18 → 1/12/18

Bibliographical note

Funding Information:
The research presented is supported by Air Force Office of Scientific Research (AFOSR) under Grant No. FA9550-16-1-0161. The views and conclusions contained herein are those of the authors and should not be interpreted as necessarily representing the official policies or endorsements, either expressed or implied, of the AFOSR or the US government.

Publisher Copyright:
© 2018 by the American Institute of Aeronautics and Astronautics, Inc. All rights reserved.

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title = "Redistribution of vibrational energy: Mechanisms and transition probabilities",

abstract = "In this paper we present a molecular level study analyzing vibrational energy redistribution in a reacting nitrogen system due to N2 + N collisions, N2 + N exchange reactions, N2 +N2 collisions and N2 +N2 exchange reactions at T = 30000K, T = 20000K and T = 10000K. We see that probability distribution functions describing vibrational energy change due to N2 + N and N2 + N2 collisions collisions peak at ∆ɛvib = 0eV and have a narrow distribution. We find that the probability distribution functions describing change in vibrational energy due to N2 + N and N2 + N2 exchange reactions have a larger width than the probability distribution functions for collisions, indicating that exchange reactions are more efficient in redistributing vibrational energy than collisions. We also find that exchange reactions that cause a change in vibrational energy are likely to change the vibrational level of the the reaction product by multiple vibrational quantum levels when compared to the reactant. On the other hand collisions are more likely to change the vibrational quantum number by one.",

author = "Grover, {Maninder S.} and Schwartzentruber, {Thomas E.}",

note = "Funding Information: The research presented is supported by Air Force Office of Scientific Research (AFOSR) under Grant No. FA9550-16-1-0161. The views and conclusions contained herein are those of the authors and should not be interpreted as necessarily representing the official policies or endorsements, either expressed or implied, of the AFOSR or the US government. Publisher Copyright: {\textcopyright} 2018 by the American Institute of Aeronautics and Astronautics, Inc. All rights reserved.; AIAA Aerospace Sciences Meeting, 2018 ; Conference date: 08-01-2018 Through 12-01-2018",

year = "2018",

doi = "10.2514/6.2018-1231",

language = "English (US)",

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series = "AIAA Aerospace Sciences Meeting, 2018",

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T2 - AIAA Aerospace Sciences Meeting, 2018

AU - Grover, Maninder S.

AU - Schwartzentruber, Thomas E.

N1 - Funding Information: The research presented is supported by Air Force Office of Scientific Research (AFOSR) under Grant No. FA9550-16-1-0161. The views and conclusions contained herein are those of the authors and should not be interpreted as necessarily representing the official policies or endorsements, either expressed or implied, of the AFOSR or the US government. Publisher Copyright: © 2018 by the American Institute of Aeronautics and Astronautics, Inc. All rights reserved.

PY - 2018

Y1 - 2018

N2 - In this paper we present a molecular level study analyzing vibrational energy redistribution in a reacting nitrogen system due to N2 + N collisions, N2 + N exchange reactions, N2 +N2 collisions and N2 +N2 exchange reactions at T = 30000K, T = 20000K and T = 10000K. We see that probability distribution functions describing vibrational energy change due to N2 + N and N2 + N2 collisions collisions peak at ∆ɛvib = 0eV and have a narrow distribution. We find that the probability distribution functions describing change in vibrational energy due to N2 + N and N2 + N2 exchange reactions have a larger width than the probability distribution functions for collisions, indicating that exchange reactions are more efficient in redistributing vibrational energy than collisions. We also find that exchange reactions that cause a change in vibrational energy are likely to change the vibrational level of the the reaction product by multiple vibrational quantum levels when compared to the reactant. On the other hand collisions are more likely to change the vibrational quantum number by one.

AB - In this paper we present a molecular level study analyzing vibrational energy redistribution in a reacting nitrogen system due to N2 + N collisions, N2 + N exchange reactions, N2 +N2 collisions and N2 +N2 exchange reactions at T = 30000K, T = 20000K and T = 10000K. We see that probability distribution functions describing vibrational energy change due to N2 + N and N2 + N2 collisions collisions peak at ∆ɛvib = 0eV and have a narrow distribution. We find that the probability distribution functions describing change in vibrational energy due to N2 + N and N2 + N2 exchange reactions have a larger width than the probability distribution functions for collisions, indicating that exchange reactions are more efficient in redistributing vibrational energy than collisions. We also find that exchange reactions that cause a change in vibrational energy are likely to change the vibrational level of the the reaction product by multiple vibrational quantum levels when compared to the reactant. On the other hand collisions are more likely to change the vibrational quantum number by one.

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DO - 10.2514/6.2018-1231

M3 - Conference contribution

AN - SCOPUS:85141649955

SN - 9781624105241

T3 - AIAA Aerospace Sciences Meeting, 2018

BT - AIAA Aerospace Sciences Meeting

PB - American Institute of Aeronautics and Astronautics Inc, AIAA

Y2 - 8 January 2018 through 12 January 2018

ER -

Redistribution of vibrational energy: Mechanisms and transition probabilities

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