Thesis Submitted for the Degree of Doctor of Philosophy University of Bath Department of Mechanical Engineering Submitted: April 2009 Revised: August 2009
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Dissertation Amer Inayat Final
Open-cell Foams as Catalyst Support: A Description of Morphology, Fluid Dynamics and Catalytic Performance Offenzellige Schäume als Katalysatorträger: Beschreibung von Morphologie, Fluiddynamik und katalytischer Performance Der Technischen Fakultät der Friedrich-Alexander-Universität Erlangen-Nürnberg zur Erlangung des Doktorgrades Dr.-Ing. vorgelegt von Amer Inayat aus Lahore Als Dissertation genehmigt von der Technische Fakultät der Friedrich-Alexander-Universität Erlangen-Nürnberg Tag der mündlichen Prüfung: 31.10.2013 Vorsitzende des Promotionsorgans: Prof. Dr.-Ing. Marion Merklein Gutachter/in: Prof. Dr. rer. nat. Wilhelm Schwieger Prof. Dr.-Ing. Carolin Körner Parts of this work were already published or submitted to Chemical Engineering Science, Advanced Materials, Advanced Engineering Materials and Chemie Ingenieur Technik: A. Inayat, H. Freund, T. Zeiser, W. Schwieger, Determining the specific surface area of ceramic foams: The tetrakaidecahedra model revisited, Chemical Engineering Science, 66 (2011) 1179–1188 A. Inayat, J. Schwerdtfeger, H. Freund, C. Körner, R.F. Singer, W. Schwieger, Periodic open-cell foams: Pressure drop measurements and modeling of an ideal tetrakaidecahedra packing, Chemical Engineering Science, 66 (2011) 2758–2763 A. Inayat, H. Freund, A. Schwab, T. Zeiser, W. Schwieger, Predicting the Specific Surface Area and Pressure Drop of Reticulated Ceramic Foams Used as Catalyst Support, Advanced Engineering Materials, 13 (2011) 990–995. S. Lopez-Orozco, A. Inayat, A. Schwab, T. Selvam, W. Schwieger, Zeolitic Materials with Hierarchical Porous Structures, Advanced Materials, 23 (2011) 2602–2615 W. Schwieger, S. Lopez, A. Inayat, H. Freund, T. Selvam, Zeolite-Containing Materials with Hierarchical Porous Structures, Chemie Ingenieur Technik, 84 (2012) 1427-1427 Additional journal publications: G.E. Schröder-Turk, W. Mickel, S.C. -
Transport Properties of Solid Foams Having Circular Strut Cross Section
Transport properties of solid foams having circular strut cross section using pore scale numerical simulations Yann Jobic, Prashant Kumar, Frederic Topin, René Occelli To cite this version: Yann Jobic, Prashant Kumar, Frederic Topin, René Occelli. Transport properties of solid foams having circular strut cross section using pore scale numerical simulations. Heat and Mass Transfer, Springer Verlag, 2017, 10.1007/s00231-017-2193-2. hal-01792823 HAL Id: hal-01792823 https://hal.archives-ouvertes.fr/hal-01792823 Submitted on 3 Apr 2021 HAL is a multi-disciplinary open access L’archive ouverte pluridisciplinaire HAL, est archive for the deposit and dissemination of sci- destinée au dépôt et à la diffusion de documents entific research documents, whether they are pub- scientifiques de niveau recherche, publiés ou non, lished or not. The documents may come from émanant des établissements d’enseignement et de teaching and research institutions in France or recherche français ou étrangers, des laboratoires abroad, or from public or private research centers. publics ou privés. Heat Mass Transfer https://doi.org/10.1007/s00231-017-2193-2 ORIGINAL Transport properties of solid foams having circular strut cross section using pore scale numerical simulations 1 1 1 1 Yann Jobic & Prashant Kumar & Frédéric Topin & René Occelli Received: 28 April 2017 /Accepted: 8 October 2017 # Springer-Verlag GmbH Germany 2017 Abstract Light cellular materials are increasingly used in many characteristics and friction factor vs. Reynolds number relation- engineering applications as they present several attractive prop- ship. Similarly, heat transfer results were used to derive heat erties including heat transfer enhancement, low pressure drop exchange coefficient between solid and fluid phases of foam compared to packed bed of spheres. -
Foam Geometry and Structural Design of Porous Material
Foam geometry and structural design of porous material Ruggero Gabbrielli A thesis submitted for the degree of Doctor of Philosophy University of Bath Department of Mechanical Engineering Submitted: April 2009 Revised: August 2009 COPYRIGHT Attention is drawn to the fact that copyright of this thesis rests with its author. A copy of this thesis has been supplied on condition that anyone who consults it is understood to recognize that its copyright rests with the author and they must not copy it or use material from it except as permitted by law or with the consent of the author. This thesis may be made available for consultation within the University Library and may be photocopied or lent to other libraries for the purposes of consultation. Contents 1 Introduction 4 2 Porous Materials 10 3 Literature review 15 3.1 Foam geometry . 15 3.1.1 Open-cell foams . 17 3.1.2 Microstructural morphology . 18 3.1.3 Kelvin’s problem . 18 3.1.4 Topology . 25 3.1.5 The structure of random foams . 25 3.2 Tiling theory . 26 3.3 Pattern formation . 29 4 Methods 31 4.1 Method I: Nets and tilings . 33 4.1.1 Delaney symbols . 33 4.2 Method II: The Corona algorithm . 37 4.2.1 A monotypic, non-isohedral simple tiling . 40 4.3 Method III: Pattern formation . 44 4.3.1 A new counter-example to Kelvin’s conjecture . 44 I 5 Periodic Nodal Surfaces 67 5.1 Surfaces . 70 5.1.1 Minimal surfaces . 71 5.1.2 Level surfaces . -
Thermal Applications of Open Cell Metal Foams
THERMAL APPLICATIONS OF OPEN CELL METAL FOAMS Burhan Ozmat, Bryan Leyda and Burt Benson ERG, Materials and Aerospace Corporation 900 Stanford Avenue, Oakland, CA 94608 Abstract: The key structural and thermo-physical properties of Reticulated Metal Foams (RMF) are reviewed. Analytical expressions relating such properties to basic structural parameters are developed through mathematical modeling and experimental studies. Conductive and convective aspects of thermal energy transfer through RMF based heat exchangers are reviewed. Mathematical model is developed which calculates maximum thermal performance for such heat exchangers .were estimated through a mathematical model. Results of experimental and Finite Element Analysis predicting thermal performance of test module using a thermal base plate, a power device and RMF heat exchanger and off the shelf external cold plate compared. The superior performance of RMF based heat exchangers are shown. 1) Introduction: It is being realized that the thermal aspects of many advancing technologies are in the critical path limiting the performance, size and the cost future products. The Reticulated Metal Foams (RMF), see Figure 1 for their physical structure, developed for structural application more than two decades a go are now becoming effective solutions to the many thermal management problems. The RMF offer a cost effective and ultra high performance thermal management technology that can be integrated with advanced high performance electronic, photonic devices and with many other challenging applications. The metal foam based thermal technology is generic, flexible and scaleable. It is generic in terms of its compatibility with the cooling media ranging from DI water, inert fluoro- carbons, and jet fuel to air He or Ar.