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Forced Convective Heat Transfer in Channels with Complex Internal Structures

Loosmann, Felix (2019):
Forced Convective Heat Transfer in Channels with Complex Internal Structures.
Darmstadt, Technische Universität, [Online-Edition: https://tuprints.ulb.tu-darmstadt.de/8982],
[Ph.D. Thesis]

Abstract

In this thesis, numerical simulations were used to investigate forced convection heat transfer through channels with complex internal structures fabricated by rapid prototyping. Numerical investigations of heat conduction through the solid phase of four different designs, flow through them and forced convection heat transfer were conducted. Numerical simulations, providing full flow field information, allow a detailed discussion of flow phenomena and temperature distribution inside the heat exchanger channels. The investigation focuses on understanding the complex interplay between heat conduction in the complex internal open-cell structures and heat transfer by forced convection. This leads to insight on the impact of the open-cell structures on the pressure drop over unit length, fluid mixing and heat transfer.The result of this insight takes the form of concrete design criteria for certain objective functions related to pressure drop or heat transfer.

Item Type: Ph.D. Thesis
Erschienen: 2019
Creators: Loosmann, Felix
Title: Forced Convective Heat Transfer in Channels with Complex Internal Structures
Language: English
Abstract:

In this thesis, numerical simulations were used to investigate forced convection heat transfer through channels with complex internal structures fabricated by rapid prototyping. Numerical investigations of heat conduction through the solid phase of four different designs, flow through them and forced convection heat transfer were conducted. Numerical simulations, providing full flow field information, allow a detailed discussion of flow phenomena and temperature distribution inside the heat exchanger channels. The investigation focuses on understanding the complex interplay between heat conduction in the complex internal open-cell structures and heat transfer by forced convection. This leads to insight on the impact of the open-cell structures on the pressure drop over unit length, fluid mixing and heat transfer.The result of this insight takes the form of concrete design criteria for certain objective functions related to pressure drop or heat transfer.

Place of Publication: Darmstadt
Divisions: 16 Department of Mechanical Engineering
16 Department of Mechanical Engineering > Fluid Mechanics and Aerodynamics (SLA)
Exzellenzinitiative
Exzellenzinitiative > Graduate Schools
Exzellenzinitiative > Graduate Schools > Graduate School of Computational Engineering (CE)
Date Deposited: 15 Sep 2019 19:55
Official URL: https://tuprints.ulb.tu-darmstadt.de/8982
URN: urn:nbn:de:tuda-tuprints-89820
Referees: Tropea, Prof. Dr. Cameron and Chandra, Prof. Dr. Sanjeev
Refereed / Verteidigung / mdl. Prüfung: 1 March 2019
Alternative Abstract:
Alternative abstract Language
In dieser Arbeit wurden numerische Simulationen verwendet, um erzwungene Konvektion durch Kanäle mit komplexen inneren Strukturen zu untersuchen. Für diese Untersuchung wurden vier Kanäle mit unterschiedlichen inneren Strukturen mittels Rapid Prototyping hergestellt. Numerische Untersuchungen der Wärmeleitung durch den Festkörper dieser vier Kanäle, deren Durchströmung und die Kombination aus beidem erzwungene Konvektion wurden durchgeführt. Numerische Simulationen, die eine vollständige Betrachtung des Strömungsfeld ermöglichen, dienen als Grundlage einer detaillierten Diskussion über Strömungsphänomene und Temperaturverteilung innerhalb der Wärmeübertragerkanäle. Die Untersuchung konzentriert sich auf das Verständnis des Zusammenspiels zwischen Wärmeleitung in den komplexen inneren Strukturen und Wärmeübertragung durch erzwungene Konvektion. Dies führt zu Erkenntnissen über die Auswirkungen der inneren Strukturen auf den Druckabfall, die Durchmischung und die Wärmeübertragung. Das Ergebnis dieser Erkenntnisse sind konkrete Auslegungskriterien für bestimmte Zielfunktionen im Abhängigkeit von Druckverlust oder WärmeübertragungGerman
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