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Dissertations / Theses on the topic 'Pressure head'

Author: Grafiati

Published: 4 June 2021

Last updated: 25 July 2025

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1

Chambers, Iain Robert. "Studies in human head injury." Thesis, University of Newcastle Upon Tyne, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.262899.

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2

Ali, A. A. A.-W. "The modelling, simulation and real time control of intercranial pressure." Thesis, University of Bradford, 1988. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.233661.

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3

Morgan, Lesley C. "Pediatric head trauma cerebral perfusion pressure as an indicator of outcome /." [Gainesville, Fla.]: University of Florida, 2003. http://purl.fcla.edu/fcla/etd/UFE0000750.

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4

Tørklep, Anders Mathias. "Pressure oscillations during start and stop of a high head Francis turbine." Thesis, Norges teknisk-naturvitenskapelige universitet, Institutt for energi- og prosessteknikk, 2012. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-19323.

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Start and stop procedures affect pressure oscillations throughout a hydropower plant. A desire to study how pressure oscillations behave during these dynamic conditions was the basis of this report. Instrumentation, experimentation and measurement analysis was conducted on a Francis model turbine in the Waterpower Laboratory at NTNU. Eight pressure transducers were calibrated and used during the experiments. Two transducers were installed in the draft tube below the turbine. One was placed in the vaneless space between the guide vanes and the impeller vanes. Three pressure transducers on an im

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5

Senior, James Alexander. "Hydrostatic pressure converters for the exploitation of very low head hydropower potential." Thesis, University of Southampton, 2009. https://eprints.soton.ac.uk/73702/.

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Much of the world's available hydropower potential has been exploited, and within the western world attention is increasingly being focussed on hydropower sites with very low head dierences. These are sites where the vertical distance through which water falls is less than ve metres, and remain unexploited as there is a recognised lack of hydropower technology avaiable to exploit these low-power sites economically. The aim of this work was therefore to develop a novel hydropower machine which could be used to viably exploit very low head dierences in river environments. A review of the hydropo

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6

Shaw, Martin Fraser. "Modelling the time-series of cerebrovascular pressure transmission variation in head injured patients." Thesis, University of Glasgow, 2012. http://theses.gla.ac.uk/3287/.

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Cerebral autoregulation is the process by which blood ow is maintained over a changing cerebral perfusion pressure. Clinically autoregulation is an important topic because it directly effects overall patient management strategy. However accurately predicting autoregulatory state or even modelling the underlying general physiological processes is a complex task. There are a number of models published within the literature but there has been no active attempt to compare and classify these models. Starting with the hypothesis that a physiologically based model would be a better predictor of autor

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7

Harju, Mika. "Exfoliation glaucoma : studies on intraocular pressure, optic nerve head morphometry, and ocular blood flow." Helsinki : University of Helsinki, 2001. http://ethesis.helsinki.fi/julkaisut/laa/kliin/vk/harju/.

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8

Brucia, Josephine Jacobs. "The effect of suction catheter insertion on head-injured adults." Case Western Reserve University School of Graduate Studies / OhioLINK, 1993. http://rave.ohiolink.edu/etdc/view?acc_num=case1060867440.

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9

Tran, Chi Thanh. "The Effective Convectivity Model for Simulation and Analysis of Melt Pool Heat Transfer in a Light Water Reactor Pressure Vessel Lower Head." Doctoral thesis, Stockholm : Division of Nuclear Power Safety, Royal Institute of Technology, 2009. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-10671.

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10

Kostas, Vladimir Ilyich. "EFFECT OF LOWER BODY POSITIVE PRESSURE ON CARDIOVASCULAR RESPONSE AT VARIOUS DEGREES OF HEAD UP TILT." UKnowledge, 2012. http://uknowledge.uky.edu/khp_etds/3.

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Various models of simulated weightlessness and resulting cardiovascular effects have been researched in the last 50 years of space exploration. Examples of such models are the Alter-G (Alt-G) treadmill used for body unweighting and head-up-tilt (HUT) model each providing similar cardiovascular effects, but differing in their stimulation of vestibular centers . Advantages of using the Alt-G include: use of lower body positive pressure (LBPP) to simulate hypogravity, it acts as a countermeasure to alleviate negative cardiovascular effects of standing and provides a constant vestibular stimulus.

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11

Xing, Mian. "Validation of TRACE Code against ROSA/LSTF Test for SBLOCA of Pressure Vessel Upper-Head Small Break." Thesis, KTH, Kärnkraftsäkerhet, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-95745.

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OECD/NEA ROSA/LSTF project tests are performed on the Large Scale Test Facility (LSTF). LSTF is a full-height, full-pressure and 1/48 volumetrically-scaled two-loop system which aims to simulate Japanese Tsuruga-2 Westinghouse-type 4-loop PWR. ROSA-V Test 6-1 simulates a pressure vessel (PV) upper-head small break loss-of-coolant accident (SBLOCA) with a break size equivalent to 1.9% of the volumetrically scaled cross-sectional area of the reference PWR cold leg.The main objective of present thesis is to build a TRACE calculation model for simulating thermal hydraulic behaviors in LSTF and PV

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12

Hauxwell, Cynthia M. "Variations in Lingual Pressure during Saliva Swallows between a Healthy Adult Female and an Adult Female with Head and Neck Cancer." University of Cincinnati / OhioLINK, 2009. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1243364890.

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13

Stockman, A. "Signal analysis of physiological control : An investigation of blood pressure control and intercranial pressure in man with clinical applications for hypertensive skin burns and head injured patients." Thesis, University of Bradford, 1987. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.379868.

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14

van, Quang Pham. "Soil formation and soil moisture dynamics in agriculture fields in the Mekong Delta, Vietnam conceptual and numerical models." Licentiate thesis, KTH, Land and Water Resources Engineering, 2009. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-10508.

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<p>Previous studies of agricultural conditions in the Mekong Delta (MD) have identified soil compaction as an obstacle to sustainable production. A conceptual model for soil formation was presented to demonstrate the link between soil hydrology and plant response. Detailed studies of soil moisture dynamics in agricultural fields were conducted using a dynamic process-orientated model. Pressure head and water flow were simulated for three selected sites during a year for which empirical data were available. Daily meteorological data were used as dynamic input and measured pressure head was used

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15

Ramsey, Michael Wiechmann. "Effects of head-up tilt on mean arterial pressure, heart rate, and regional cardiac output distribution in aging rats." Texas A&M University, 2005. http://hdl.handle.net/1969.1/3094.

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Many senescent individuals demonstrate an inability to regulate mean arterial pressure (MAP) in response to standing or head-up tilt; however, whether this aging effect is the result of depressed cardiac function or an inability to reduce peripheral vascular conductance remains unknown. Therefore, the purpose of this research was to investigate the effects of aging on MAP, heart rate (HR), regional blood flow (via radioactive-microspheres), and vascular conductance during head-up tilt in conscious young (4 mo; n=12) and old (24 mo; n=10) male Fischer-344 rats. Heart rate and MAP were measured

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16

Madokoro, Hiroshi [Verfasser], and T. [Akademischer Betreuer] Schulenberg. "Thermo-structural analysis of a reactor pressure vessel lower head during core-melt severe accidents / Hiroshi Madokoro ; Betreuer: T. Schulenberg." Karlsruhe : KIT-Bibliothek, 2018. http://d-nb.info/1172351775/34.

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17

Fukuzawa, Kenji, 健二福澤, Takuro Muramatsu, Hiroaki Amakawa, Shintaro Itoh, and Hedong Zhang. "Nonuniform Distribution of Molecularly Thin Lubricant Caused by Inhomogeneous Buried Layers of Discrete Track Media." IEEE, 2008. http://hdl.handle.net/2237/11180.

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18

Horník, Jan. "Návrh komory výměníku tepla." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2016. http://www.nusl.cz/ntk/nusl-241229.

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The master thesis is focused on the field of heat exchangers. Theoretical part makes the reader familiar with heat exchangers. Practical part is focused on design of chamber, which is part of heat exchanger. Practical part consists of strength calculation by standard ČSN EN 13445. Dimensions of tube sheet are gained in program Visual vessel design. Those parameters are used for creating of 3D model with accurate dimensions which is analyzed in ANSYS Workbench. Output of this analysis is evaluation by stress classification. Practical part is supplemented by drawing of heat exchanger.

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19

Carlson, Kjirste Lynn. "Human hip joint mechanics : an investigation into the effects of femoral head endoprosthetic replacements using in vivo and in vitro pressure data." Thesis, Massachusetts Institute of Technology, 1993. http://hdl.handle.net/1721.1/31043.

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20

McCafferty, Sean, Jason Levine, Jim Schwiegerling, and Eniko T. Enikov. "Goldmann and error correcting tonometry prisms compared to intracameral pressure." BIOMED CENTRAL LTD, 2018. http://hdl.handle.net/10150/626542.

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Background: Compare Goldmann applanation tonometer (GAT) prism and correcting applanation tonometry surface (CATS) prism to intracameral intraocular pressure (IOP), in vivo and in vitro. Methods: Pressure transducer intracameral IOP was measured on fifty-eight (58) eyes undergoing cataract surgery and the IOP was modulated manometrically to 10, 20, and 40 mmHg. Simultaneously, IOP was measured using a Perkins tonometer with a standard GAT prism and a CATS prism at each of the intracameral pressures. Statistical comparison was made between true intracameral pressures and the two prism measureme

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21

Pearce, Christopher William. "On the dynamic pressure response of the brain during blunt head injury : modelling and analysis of the human injury potential of short duration impact." Thesis, University of Exeter, 2013. http://hdl.handle.net/10871/14185.

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Impact induced injury to the human head is a major cause of death and disability; this has driven considerable research in this field. Despite this, the methods by which the brain is damaged following non-penetrative (blunt) impact, where the skull remains intact, are not well understood. The mechanisms which give rise to brain trauma as a result of blunt head impact are frequently explored using indirect methods, such as finite element simulation. Finite element models are often created manually, but the complex anatomy of the head and its internal structures makes the manual creation of a mo

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22

Antonucci, Marta. "Uterine function in labour : an investigation of the relationship between intrauterine pressure, head-to-cervix force and cervical dilatation, and their correlation with mode of delivery." Thesis, Imperial College London, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.394277.

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23

McCafferty, Sean, Jason Levine, Jim Schwiegerling, and Eniko T. Enikov. "Goldmann applanation tonometry error relative to true intracameral intraocular pressure in vitro and in vivo." BIOMED CENTRAL LTD, 2017. http://hdl.handle.net/10150/626266.

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Background: Goldmann applanation tonometry (GAT) error relative to intracameral intraocular pressure (IOP) has not been examined comparatively in both human cadaver eyes and in live human eyes. Futhermore, correlations to biomechanical corneal properties and positional changes have not been examined directly to intracameral IOP and GAT IOP. Methods: Intracameral IOP was measured via pressure transducer on fifty-eight (58) eyes undergoing cataract surgery and the IOP was modulated manometrically on each patient alternately to 10, 20, and 40 mmHg. IOP was measured using a Perkins tonometer in th

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24

Hasnain, Shahid. "Steady Periodic Water Waves Solutions Using Asymptotic Approach." Thesis, Linköpings universitet, Tillämpad matematik, 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-69421.

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The aim of this work is to study the relation between two invariants of water flow in a channel of finite depth. The first invariant is the height of the water wave and the second one is the flow force. We restrict ourselves to water waves of small amplitude. Using asymptotic technique together with the method of separation of variables, we construct all water waves of small amplitude which are parameterized by a small parameter. Then we demonstrate numerically that the flow force depends monotonically on the height.

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25

Coelho, Welington Ricardo [UNESP]. "Análise do fenômeno de cavitação em bomba centrífuga." Universidade Estadual Paulista (UNESP), 2006. http://hdl.handle.net/11449/88879.

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Made available in DSpace on 2014-06-11T19:23:39Z (GMT). No. of bitstreams: 0 Previous issue date: 2006-01-30Bitstream added on 2014-06-13T18:10:03Z : No. of bitstreams: 1 coelho_wr_dr_ilha_prot.pdf: 3240058 bytes, checksum: f2c138a1a2cb98ce4eb9f9618ea59484 (MD5)<br>Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)<br>Cavitação em bombas centrífugas é a formação de bolhas de vapor do fluido bombeado na região de sucção do equipamento. As bolhas de vapor formadas em algum local do escoamento, em geral na região de sucção da bomba, entrarão posteriormente em colapso. Este fenô

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26

Liporaci, Rogério Ferreira. "Respostas cardiovasculares e biomecânicas aos efeitos do tilt test ativo e passivo em indivíduos saudáveis." Universidade de São Paulo, 2011. http://www.teses.usp.br/teses/disponiveis/17/17138/tde-10012017-112630/.

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Para avaliação da sincope neurocardiogênica, testes ativos e passivos de mudança postural são utilizados, e verificar o comportamento da musculatura e da oscilação do corpo pode auxiliar no melhor entendimento das respostas cardiovasculares e biomecânicas. O objetivo do presente estudo foi comparar protocolos ativo e passivo de mudança postural, padronizado de 15 minutos, associado a três manobras de Valsalva intervaladas, para os testes de mudança postural ativa, Acive Standing test (AS) e passiva, Head-Up Tilt test (HUT), utilizados no diagnóstico da síncope neurocardiogênica (SNC), em relaç

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27

Gomes, Pedro Miguel Bule. "Traumatismo craniano : contribuição da craniectomia descompressiva para a sobrevivência de pacientes caninos com hipertensão intracraniana traumática refractária ao tratamento médico : estudo retrospectivo." Bachelor's thesis, Universidade Técnica de Lisboa. Faculdade de Medicina Veterinária, 2011. http://hdl.handle.net/10400.5/3051.

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Dissertação de Mestrado Integrado em Medicina Veterinária<br>O traumatismo crânio-encefálico (TCE) grave está associado a uma taxa de mortalidade muito elevada e é cada vez mais comum na clínica de pequenos animais. Isto deve-se em grande parte ao crescente número de animais domésticos e consequentemente de acidentes rodoviários envolvendo esses mesmos animais. A lesão cerebral causada pelo TCE tem duas componentes essenciais: a primária que diz respeito à lesão mecânica causada pelas forças de aceleração, desaceleração, rotação e compressão que actuam sobre o crânio e cérebro no momento

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28

Brink, Lize. "An investigation into the weld integrity of the head–to–skirt junction on tall distillation columns / L. Brink." Thesis, North-West University, 2010. http://hdl.handle.net/10394/4877.

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This study addresses the fatigue life of the head–to–skirt welds of tall distillation columns. Fatigue tests were done on two types of weld geometries which approximate the head–toskirt configurations. From the fatigue tests it was determined that the fatigue life of the experimental samples can be substantially improved by applying weld build–up between the head and the skirt. The expected fatigue life of the test samples was determined by way of calculation employing the so called Nominal–Stress–Approach, the Effective–Notch–Stress–Approach and the Stress–Life–Approach. For both the Nominal–

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29

Coelho, Welington Ricardo. "Análise do fenômeno de cavitação em bomba centrífuga /." Ilha Solteira : [s.n.], 2006. http://hdl.handle.net/11449/88879.

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Orientador: João Batista Aparecido<br>Banca: Jose Luiz Gasche<br>Banca: Paulo Gilberto de Paula Toro<br>Resumo: Cavitação em bombas centrífugas é a formação de bolhas de vapor do fluido bombeado na região de sucção do equipamento. As bolhas de vapor formadas em algum local do escoamento, em geral na região de sucção da bomba, entrarão posteriormente em colapso. Este fenômeno é importante cientificamente, tecnicamente e economicamente. Cientificamente é interessante, pois envolve o escoamento de um fluido em estado líquido, simultaneamente ocorre a formação de bolhas de vapor, que também escoam

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30

Kuhmmer, Regina. "Efeitos da suplementação de sal na profilaxia da síncope vasovagal : ensaio clínico randomizado." reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2007. http://hdl.handle.net/10183/17367.

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Introdução: Síncope e sintomas ortostáticos são comuns em pessoas saudáveis. A suplementação de sal é utilizada em pacientes com melhora na resposta pressora e aumento da tolerância ortostática. Nós testamos à hipótese de que uma suplementação de sal aumentaria a tolerância ortostática em voluntários saudáveis. Métodos e Resultados: Vinte voluntários saudáveis (13 do sexo feminino, idade 29 ± 5,6 anos), sem história de síncope, foram submetidos ao teste inclinação ortostática, em um ângulo de 70 graus, por 35 minutos ou até que sintomas de pré-síncope ou síncope fossem observados. Foram random

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31

Ševčík, Ondřej. "Aplikace vysokotlakého palivového systému na vznětový motor." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2018. http://www.nusl.cz/ntk/nusl-378502.

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This thesis focuses on the design of new high pressure injection system application on diesel engine. The design came from company Zetor’s demands. For this application was chosen system Common Rail supplied by company Bosch. Assignment was separated into several tasks. Research of suitable components for low pressure section, design of waste system and high pressure injection tubes design including injector clamping. Due to injectors used in this system was necessary to redesign cover for valves and even new system to lead wires from outside of the engine to injectors. Injector is attached by

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32

Ramaswamy, Raghupathy. "Thermal behavior of food materials during high pressure processing." Columbus, Ohio : Ohio State University, 2007. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=osu1190122901.

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33

Maffulli, Roberto. "Conjugate heat transfer in high pressure turbines." Thesis, University of Oxford, 2016. https://ora.ox.ac.uk/objects/uuid:6044f198-77ae-43e2-99af-cea4960e9407.

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In the present thesis the link between aerodynamics and heat transfer in high pressure turbines is investigated through steady numerical calculations. The investigations include the effect of wall temperature on the Heat Transfer coefficient (HTC), aiming to understand whether the conventional assumption of HTC being invariant with the thermal boundary condition does hold in a typical compressible flow, where the aerodynamic and thermal fields are strongly coupled. A novel non-linear three point method is proposed to scale wall heat transfer accounting for the dependence of HTC on wall tempera

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34

Schaefer, Laura Atkinson. "Single presssure absorption heat pump analysis." Diss., Georgia Institute of Technology, 2000. http://hdl.handle.net/1853/17924.

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35

Shahi, Mohammad Hassan Panjeh. "Pressure drop consideration in process integration." Thesis, University of Manchester, 1992. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.333599.

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36

Miller, Keith Martin. "Heat transfer and velocity measurements in a kettle reboiler." Thesis, Heriot-Watt University, 2000. http://hdl.handle.net/10399/1204.

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37

Keinath, Brendon Louis. "Void fraction, pressure drop, and heat transfer in high pressure condensing flows through microchannels." Diss., Georgia Institute of Technology, 2012. http://hdl.handle.net/1853/45806.

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Flow mechanisms affect transport processes during condensation. Most studies on two-phase flow regimes are qualitative in nature, typically providing only information to guide the identification of the respective regimes and the transitions between them. These studies have, however, not yielded quantitative information to assist the development of pressure drop and heat transfer models. Such qualitative studies have also yielded results with considerable variability between investigators. A comprehensive investigation of flow mechanisms, void fraction, pressure drop and heat transfer during

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38

Jeong, Eun S. "Heat transfer with oscillating pressure in reciprocating machinery." Thesis, Massachusetts Institute of Technology, 1991. http://hdl.handle.net/1721.1/13259.

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39

Alenezi, Abdulrahman. "Heat removal in high pressure turbine seal segments." Thesis, Cranfield University, 2017. http://dspace.lib.cranfield.ac.uk/handle/1826/12318.

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An important parameter for turbomachinery designers is “clearance control”, because the clearances between interfaces must be set to optimum values to maximize power output, operational life and efficiency. Leakage of hot gas result- ing from excessive clearance, can lead to flow instabilities, components overheat- ing, lower cycle efficiency and a dramatic increase in specific fuel consumption (SFC). Seal segments are used to reduce blade tip leakage, maintain coolant air flow and the stability of rotor-dynamic systems, helping to maximize blade perfor- mance. Seal segments in the High-Pressu

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40

Johnson, Thomas G. "Heat Transfer in Brine Solutions at Supercritical Pressure." Ohio University / OhioLINK, 2015. http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1439504843.

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41

Polyzoev, Vasco. "HAND-HELD TONOMETER FOR TRANSPALPEBRAL INTRAOCULAR PRESSURE MEASUREMENT." Diss., The University of Arizona, 2011. http://hdl.handle.net/10150/202517.

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This dissertation describes the development of a portable, hand-held tonometer for measurement of the intraocular pressure through the eyelid. The primary use of such device will be by people diagnosed with the eye disease glaucoma. Glaucoma is the second leading cause of blindness in the world and is asymptomatic to the patient in its early stages. This allows it to remain undiagnosed for prolonged periods, causing irreversible damage to the affected person's vision. Elevated intraocular pressure is the main risk factor associated with the development of glaucoma, and is currently the only sy

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42

Papangelakis, V. G. (Vladimiros George) 1958. "Aqueous pressure oxidation of arsenopyrite." Thesis, McGill University, 1986. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=65435.

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43

竹井, 理絵, Rie TAKEI, 真貴辻村, Maki TSUJIMURA, 丈子高木 та Takeko TAKAGI. "異なる採取法による土壌水中の溶存無機イオン濃度の違い". 名古屋大学農学部付属演習林, 1998. http://hdl.handle.net/2237/8492.

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44

Agarwal, Akhil. "Heat Transfer and Pressure Drop During Condensation of Refrigerants in Microchannels." Diss., Georgia Institute of Technology, 2006. http://hdl.handle.net/1853/14129.

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Two-phase flow, boiling, and condensation in microchannels have received considerable attention in the recent past due to the growing interest in the high heat fluxes made possible by these channels. This dissertation presents a study on the condensation of refrigerant R134a in small hydraulic diameter (100 < Dh < 160 mm) channels. A novel technique is used for the measurement of local condensation heat transfer coefficients in small quality increments, which has typically been found to be difficult due to the low heat transfer rates at the small flow rates in these microchannel

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45

Kingsley-Rowe, James Robertson. "Pressure and heat transfer measurement using a luminescent paint method." Thesis, University of Bath, 2002. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.248105.

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46

Alhajeri, Hamad. "Heat removal in axial flow high pressure gas turbine." Thesis, Cranfield University, 2016. http://dspace.lib.cranfield.ac.uk/handle/1826/11465.

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The demand for high power in aircraft gas turbine engines as well as industrial gas turbine prime mover promotes increasing the turbine entry temperature, the mass flow rate and the overall pressure ratio. High turbine entry temperature is however the most convenient way to increase the thrust without requiring a large change in the engine size. This research is focused on improving the internal cooling of high pressure turbine blade by investigating a range of solutions that can contribute to the more effective removal of heat when compared with existing configuration. The role played by the

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47

Venables, Robert. "Thermal behaviour of transient high pressure hydrocarbon systems." Thesis, Imperial College London, 1997. http://hdl.handle.net/10044/1/8020.

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48

Fialová, Michaela. "Analýza hltnosti pojistného ventilu na napájecí vodě." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2011. http://www.nusl.cz/ntk/nusl-229746.

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In this thesis I review the sufficient flow capacity of the safety valve against high-pressure heater thermal pressurization in high-pressure feedwater heater on nuclear power Dukovany. I present basic possible cases of thermal pressurization both a high node heater, and the extended pressure unit in case of closure all power heads to steam generators.

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49

Abuserwal, Ahmed. "Pressure drop and forced convective heat transfer in porous media." Thesis, University of Sheffield, 2018. http://etheses.whiterose.ac.uk/19512/.

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Metal foams, a new class of porous material with highly permeable structure and higher porosity (>0.60) compared with classical porous granular beds, are a viable solution to enlarge the thermal exchange area and provide a high heat capacity and high specific area. These metal foams are available in a number of solid materials with different porosities and pore size. There is a current lack of understanding regarding metal foam microstructure parameters’ effects on hydraulic and thermal parameters. This is a barrier to the design and implementation of various industrial applications. The curre

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Kamalian, Amirali. "Heat transfer modelling of high pressure steam pretreatment of biomass." Thesis, KTH, Skolan för kemi, bioteknologi och hälsa (CBH), 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-238585.

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Pretreatment of biomass plays an important role in IGCC processes. Optimized operating conditions improve overall process eciency, product diversity and producergas composition. This project focuses on the pretreatment of spruce woodbiomass using high pressure superheated steam in a packed bed reactor with heated walls. The objective is to optimize the operation for ecient energy consumption and uniform thermal treatment of wood particles along the reactor. For this purpose,two models have been developed: Single-phase superheated steam in porous media where local thermal nonequilibrium conditi

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