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Electromagnetic Energy Transport Through Complex Media.

Record Type:	Electronic resources : Monograph/item
Title/Author:	Electromagnetic Energy Transport Through Complex Media./
Author:	Hansson, Kaelan B.
Description:	1 online resource (209 pages)
Notes:	Source: Dissertations Abstracts International, Volume: 83-05, Section: B.
Contained By:	Dissertations Abstracts International83-05B.
Subject:	Aerospace engineering. -
Online resource:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=28845368click for full text (PQDT)
ISBN:	9798471103474

Electromagnetic Energy Transport Through Complex Media.
Hansson, Kaelan B.

Electromagnetic Energy Transport Through Complex Media. - 1 online resource (209 pages)

Source: Dissertations Abstracts International, Volume: 83-05, Section: B.

Thesis (Ph.D.)--University of Michigan, 2021.

Includes bibliographical references

Electromagnetic waves are used in two distinct ways, to transmit information and to carry energy. For aerospace applications, the use of optical methods is excellent for making high fidelity measurements. High temperature flows, such as those found during atmoshperic entry, can also experience significant radiative heat transfer. This energy can lead to added heat loads to vehicles and, in extreme cases, alter the flow chemistry. Radiative transfer can also be affected by the addition of particulate material in the flow. These particles can form optically thick clouds which dramatically affect the flow properties through the process of absorption and scattering. This work is divided into two principal parts. The first part analyzes the various aspects of radiative transfer in a heated particle laden flow. This includes a summary of methods used to estimate the optical properties of individual particles, as well as the developments to calculate the optical properties of large absorbing particles. This is followed by an analysis of radiative transfer through groups of particles. It is found that the Beer Law can suffer inaccuracies at high particle densities or very fine mesh resolutions. These results are used to develop a Monte Carlo ray tracing (MCRT) framework to analyze the radiative transfer through a particle laden flow, and validate coupled simulations of the system. The second part of this work discusses hydrogen helium flows at atmospheric entry conditions experienced in the outer gas giants. A non-Boltzmann method to estimate excited states is developed. This is used to analyze chemical models used for computational fluid dynamics (CFD) simulations of these flows and validate them against experimental measurements. It is found that no current CFD chemistry models accurately predict the flow chemistry, likely due to discrepancies in the ionization rate of hydrogen.

Electronic reproduction.
Ann Arbor, Mich. :
ProQuest,
2023

Mode of access: World Wide Web

ISBN: 9798471103474Subjects--Topical Terms:

1002622
Aerospace engineering.
Subjects--Index Terms:

Radiative heat transferIndex Terms--Genre/Form:

542853
Electronic books.

Electromagnetic Energy Transport Through Complex Media.
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245 1 0 $a Electromagnetic Energy Transport Through Complex Media.
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500 $a Source: Dissertations Abstracts International, Volume: 83-05, Section: B.
500 $a Advisor: Raman, Venkat.
502 $a Thesis (Ph.D.)--University of Michigan, 2021.
504 $a Includes bibliographical references
520 $a Electromagnetic waves are used in two distinct ways, to transmit information and to carry energy. For aerospace applications, the use of optical methods is excellent for making high fidelity measurements. High temperature flows, such as those found during atmoshperic entry, can also experience significant radiative heat transfer. This energy can lead to added heat loads to vehicles and, in extreme cases, alter the flow chemistry. Radiative transfer can also be affected by the addition of particulate material in the flow. These particles can form optically thick clouds which dramatically affect the flow properties through the process of absorption and scattering. This work is divided into two principal parts. The first part analyzes the various aspects of radiative transfer in a heated particle laden flow. This includes a summary of methods used to estimate the optical properties of individual particles, as well as the developments to calculate the optical properties of large absorbing particles. This is followed by an analysis of radiative transfer through groups of particles. It is found that the Beer Law can suffer inaccuracies at high particle densities or very fine mesh resolutions. These results are used to develop a Monte Carlo ray tracing (MCRT) framework to analyze the radiative transfer through a particle laden flow, and validate coupled simulations of the system. The second part of this work discusses hydrogen helium flows at atmospheric entry conditions experienced in the outer gas giants. A non-Boltzmann method to estimate excited states is developed. This is used to analyze chemical models used for computational fluid dynamics (CFD) simulations of these flows and validate them against experimental measurements. It is found that no current CFD chemistry models accurately predict the flow chemistry, likely due to discrepancies in the ionization rate of hydrogen.
533 $a Electronic reproduction. $b Ann Arbor, Mich. : $c ProQuest, $d 2023
538 $a Mode of access: World Wide Web
650 4 $a Aerospace engineering. $3 1002622
650 4 $a Electromagnetics. $3 3173223
650 4 $a Energy. $3 876794
650 4 $a Thermodynamics. $3 517304
653 $a Radiative heat transfer
653 $a Electromagnetic energy transport
653 $a Complex media
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690 $a 0538
690 $a 0348
690 $a 0607
690 $a 0791
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710 2 $a University of Michigan. $b Aerospace Engineering. $3 2093897
773 0 $t Dissertations Abstracts International $g 83-05B.
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