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Dissertations / Theses on the topic 'Flowers – chemistry'

Author: Grafiati

Published: 4 June 2021

Last updated: 8 February 2022

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1

Emami, Mohsen Davazdah. "Prediction of finite rate chemistry turbulent combustion." Thesis, Imperial College London, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.325311.

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2

Almehmady, Alshaimaa. "ABA triblock copolymer flower micelles formulations." Thesis, University of Nottingham, 2018. http://eprints.nottingham.ac.uk/50848/.

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Amphiphilic polymeric materials have been used in pharmaceutical and biotechnology products for decades. These polymeric materials have grown considerably from their earlier use as surfactants, sequestering agents, drug delivery systems such as microparticles used as controlled release depots, to multifunctional polymeric micelles capable of targeting and controlling release of drugs. These generations of targeted polymeric micelles can be engineered to navigate complex biological environment, incorporate biological functionalities to achieve target specificity and control of drug concentratio

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3

Hau, Lap Wing. "Electrokinetically-driven liquid flows in microchannels using surface-chemistry technology /." View abstract or full-text, 2005. http://library.ust.hk/cgi/db/thesis.pl?MECH%202005%20HAU.

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4

Petrov, Constantine A. (Constantine Alexander). "Numerical simulation of reacting flows with complex chemistry using flame embedding." Thesis, Massachusetts Institute of Technology, 1996. http://hdl.handle.net/1721.1/45481.

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5

Cinnella, Pasquale. "Flux-split algorithms for flows with non-equilibrium chemistry and thermodynamics." Diss., Virginia Polytechnic Institute and State University, 1989. http://hdl.handle.net/10919/54506.

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New flux-split algorithms are developed for high velocity, high-temperature flow situations, when finite-rate chemistry and non-equilibrium thermodynamics greatly affect the physics of the problem. Two flux-vector-split algorithms, of the Steger-Warming and of the Van Leer type, and one flux-difference-split algorithm of the Roe type are established and utilized for the accurate numerical simulation of flows with dissociation, ionization, and combustion phenomena. Several thermodynamic models are used, including a simplified vibrational non-equilibrium model and an equilibrium model based upon

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6

D'Alessio, Giuseppe. "Data-driven models for reacting flows simulations: reduced-order modelling, chemistry acceleration and analysis of high-fidelity data." Doctoral thesis, Universite Libre de Bruxelles, 2021. https://dipot.ulb.ac.be/dspace/bitstream/2013/328064/5/contratGA.pdf.

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Combustion science must necessarily go through a deep process of innovation, as only improving the energy efficiency and the fuel flexibility it will be possible to mitigate the impact of the anthropogenic activities on the climate and the environment. Because of the strong relation that is observed in chemically reacting flows between the fluid-dynamic conditions and the chemical kinetics, the use of Computational Fluid Dynamics (CFD) simulations with detailed kinetic mechanisms represents the best tool to optimize and develop novel combustion systems. In fact, while the CFD provides for the

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7

Bianco, Federico. "Theoretical and numerical analysis of the interaction between dynamics and chemistry in reactive flows." Paris 6, 2013. http://www.theses.fr/2013PA066243.

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La thèse comporte trois parties. La première partie de la thèse est consacrée à l'étude d'une équation non linéaire de "convection-diffusion-réaction" pour un champ scalaire passif. L'objectif est de comprendre l'influence de la présence d'une advection compressible sur la dynamique de la propagation asymptotique d'un front réactif. L'effet, mesuré quantitativement, se révèle être généralement faible. Dans la deuxième partie, nous avons étudié les processus de la "réaction-diffusion" dans une structure percolative bidimensionnelle. Deux problèmes sont considérés: la propagation d'une ré

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8

Erdem, Birsen. "Finite Volume Solutions Of 1d Euler Equations For High Speed Flows With Finite-rate Chemistry." Master's thesis, METU, 2003. http://etd.lib.metu.edu.tr/upload/2/703868/index.pdf.

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In this thesis, chemically reacting flows are studied mainly for detonation problems under 1D, cylindrical and spherical symmetry conditions. The mathematical formulation of chemically reacting, inviscid, unsteady flows with species conservation equations and finite-rate chemistry is described. The Euler equations with finite-rate chemistry are discretized by Finite-Volume method and solved implicitly by using a time-spliting method. Inviscid fluxes are computed using Roe Flux Difference Splitting Model. The numerical solution is implemented in parallel using domain decomposition and PVM libra

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9

Holloway, Craig Roy. "Stability of fibre-reinforced viscous flows." Thesis, University of Birmingham, 2017. http://etheses.bham.ac.uk//id/eprint/7427/.

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This thesis focusses on two models (inactive and active) for fibre-reinforced viscous flows, examples of which may be found in numerous industrial and biological applications. In chapters 2-4 we consider Ericksen's model for a transversely isotropic fluid, which treats suspensions of nonmotile particles as a continuum with an evolving preferred direction; this model describes fibrous materials as diverse as extracellular matrix, textile tufts and cellulose microfibers. Linear stability analyses of transversely isotropic viscous fluid between two rotating co-axial cylinders and two horizontal b

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10

Hammond, Stephen Peter. "Imaging of luminescent nanoparticles in flows : development of surface active luminescent lanthanide complexes." Thesis, University of Birmingham, 2009. http://etheses.bham.ac.uk//id/eprint/1235/.

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We have developed a new ligand (H\(_3\)L\(^2\)) based on a DTPA bis-amide backbone which improves upon previous work within the group. The quantum yields of the europium and samarium complexes of H\(_3\)L\(^2\) are greatly enhanced over that of H\(_3\)L\(^1\). The previously observed nanoparticle-based quenching of the lanthanide luminescence lifetime of EuL\(^1\) is suppressed in EuL\(^2\). We have demonstrated the functionalisation of gold and platinum nanoparticles of various sizes with the surface active lanthanide complexes of H\(_3\)L\(^1\) and H\(_3\)L\(^2\). As a proof of principle, we

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11

Zhou, Fangbin. "Inertial effects upon suspension shear flows : instability issue." Thesis, Georgia Institute of Technology, 2002. http://hdl.handle.net/1853/10056.

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12

Holzer, Gillian G. "Modelling the Photoreduction of A Chromium (VI) Pigment in Alfredo Ramos Martínez’s Mural Flower Vendors." Scholarship @ Claremont, 2019. https://scholarship.claremont.edu/scripps_theses/1346.

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One of the most stunning works of art on the Scripps College campus is the mural Flower Vendors(1946). The artist,Alfredo Ramos Martínez, an influential figure in Mexican Modernism, executed the work using a variety of traditional and non-traditional techniques. Prior analysis of the work indicated the use of a wax emulsion medium and established the range of pigments used. Ramos Martínez’s use of lead chromate (chrome yellow, Pb(CrO4)) was unusual in wall painting, and the pigment itself has been shown to photodegrade and darken over time in oil paintings, due to the reduction of Cr(VI) to Cr

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13

Amarasinghe, Don Praveen. "A study of the alignment of polymeric molecules and vesicles in fluid flows for linear dichroism experiments." Thesis, University of Warwick, 2018. http://wrap.warwick.ac.uk/105768/.

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Linear dichroism (LD) spectroscopy is a technique which uses polarised light to make inferences on the relative orientations of chemical groups within a molecule. A requirement for experiments using this technique is the alignment of molecules in the analyte. This thesis considers the use of fluid flows to align molecules. The use of bead-spring and bead-rod models to simulate the behaviour of polymers and particles in fluid flows has been extensively discussed in the literature. In this work, the FENE-Fraenkel spring force law is implemented in bead-spring chain simulations, to assess the ali

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14

Andrienko, Daniil. "Non-equilibrium Models for High Temperature Gas Flows." Wright State University / OhioLINK, 2014. http://rave.ohiolink.edu/etdc/view?acc_num=wright1405505300.

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15

Koopmans, Robert-Jan. "Modelling of multiphase multicomponent chemically reacting flows through packed beds." Thesis, University of Southampton, 2013. https://eprints.soton.ac.uk/355889/.

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Currently used rocket propellants such as hydrazine, monomethylhydrazine, unsymmetrical dimethylhydrazine and nitrogen tetroxide are carcinogenic and toxic to the environment and therefore special protective measures are required when producing, transporting, storing and handling them. Employing alternatives could possibly save costs and this has revived the research interest in so called green propellants. Hydrogen peroxide is such a possible alternative. It requires a catalyst bed to decompose the liquid peroxide into steam and oxygen. The purpose of this work is to design numerical tools th

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16

McKibben, John Ferney. "A Computational fluid dynamics model for transient three-dimensional free surface flows." Diss., Georgia Institute of Technology, 1993. http://hdl.handle.net/1853/5790.

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17

Dreßler, Louis Jons [Verfasser], Andreas [Akademischer Betreuer] Dreizler, Amsini [Akademischer Betreuer] Sadiki, and Filho Guenther Carlos [Akademischer Betreuer] Krieger. "Towards Predictive Large-Eddy-Simulation-based Modeling of Reactive Multiphase Flows using Tabulated Chemistry / Louis Jons Dreßler ; Andreas Dreizler, Amsini Sadiki, Guenther Carlos Krieger Filho." Darmstadt : Universitäts- und Landesbibliothek, 2021. http://nbn-resolving.de/urn:nbn:de:tuda-tuprints-195119.

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18

Furbank, Roy Jeffrey. "Drop formation from particulate suspensions." Diss., Available online, Georgia Institute of Technology, 2004:, 2004. http://etd.gatech.edu/theses/available/etd-05172004-100527/unrestricted/furbank%5Froy%5Fj%5F200407%5Fphd.pdf.

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Thesis (Ph. D.)--School of Chemical and Biomolecular Engineering, Georgia Institute of Technology, 2005. Directed by F. Joseph Schork.<br>Schork, F. Joseph, Committee Chair ; Morris, Jeffrey F., Committee Co-Chair ; Forney, Larry J., Committee Member ; Breedveld, Victor, Committee Member ; Mucha, Peter J., Committee Member ; Smith, Marc K., Committee Member. Includes bibliographical references.

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19

Hosseini, Seyed Ali. "Development of a lattice Boltzmann-based numerical method for the simulation of reacting flows." Thesis, université Paris-Saclay, 2020. http://www.theses.fr/2020UPASC012.

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La méthode des réseaux de Boltzmann est une alternative efficace aux approches classiques de simulation des écoulements. Cette méthode peut potentiellement être étendue à des écoulements complexes, comme la combustion à nombre de Mach faible avec un grand nombre de variables, variation de température, propriétés variables et couvrant différentes échelles. Etant donné les variations importantes des paramètres de diffusion et les problèmes de stabilité de la méthode des réseaux de Boltzmann, le choix de l’opérateur de collision est de la plus haute importance. De plus, la méthode des réseaux de

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20

Sutton, Kaylee B. "Surface Nonuniformities in Waterborne Coatings due to Evaporative Mechanisms." University of Akron / OhioLINK, 2016. http://rave.ohiolink.edu/etdc/view?acc_num=akron1470407446.

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21

"Antioxidant and antiproliferative activities of flower tea extracts." 2007. http://library.cuhk.edu.hk/record=b5896541.

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Leung, Yu Tim.<br>Thesis submitted in: November 2006.<br>Thesis (M.Phil.)--Chinese University of Hong Kong, 2007.<br>Includes bibliographical references (leaves 103-128).<br>Abstracts in English and Chinese.<br>Thesis Committee --- p.i<br>Acknowledgements --- p.ii<br>Abstract --- p.iii<br>摘要 --- p.iv<br>Table of Contents --- p.v<br>List of Tables --- p.ix<br>List of Figures --- p.x<br>Abbreviations --- p.xiii<br>Chapter 1. --- Introduction<br>Chapter 1.1 --- Flower herbal teas --- p.1<br>Chapter 1.2 --- R. rugosa --- p.3<br>Chapter 1.2.1 --- The phytochemistry of R. rugosa --- p.3<b

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22

Wang, Liangyu. "Detailed chemistry, soot, and radiation calculations in turbulent reacting flows." 2004. http://etda.libraries.psu.edu/theses/approved/WorldWideIndex/ETD-447/index.html.

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23

Contreras, Espada Jesús. "Numerical Simulation of Reacting Flows under Laminar Conditions with Detailed Chemistry." Phd thesis, 2010. http://tuprints.ulb.tu-darmstadt.de/2330/2/Diss_2010_11_21.pdf.

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Many industrial applications deal with chemical reactive systems under laminar conditions. Processes like combustion, chemical vapour deposition, coatings, oxidations and many others often times occur in a laminar flow regime, where the reaction rates are controlled by the molecular diffusion of the reactants. Laminar flames are considered nowadays an illustrative example of the combustion phenomenon and its experimental and detailed numerical analysis is an essential part in the modelling of turbulent combustion processes as well as for pollutant formation. The coupling of an academic CFD cod

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24

Michoski, Craig E. "Evolution equations in physical chemistry." Thesis, 2009. http://hdl.handle.net/2152/ETD-UT-2009-05-54.

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We analyze a number of systems of evolution equations that arise in the study of physical chemistry. First we discuss the well-posedness of a system of mixing compressible barotropic multicomponent flows. We discuss the regularity of these variational solutions, their existence and uniqueness, and we analyze the emergence of a novel type of entropy that is derived for the system of equations. Next we present a numerical scheme, in the form of a discontinuous Galerkin (DG) finite element method, to model this compressible barotropic multifluid. We find that the DG method provides stable and

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25

Dreßler, Louis Jons. "Towards Predictive Large-Eddy-Simulation-based Modeling of Reactive Multiphase Flows using Tabulated Chemistry." Phd thesis, 2021. https://tuprints.ulb.tu-darmstadt.de/19511/1/thesisDressler2021.pdf.

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Probably the strongest argument in favor of liquid fuels, compared to gaseous fuels, electrical batteries or mechanical energy storages, is their high energy density at ambient conditions. This contributed to the strong attention dedicated to combustion devices fueled with liquids in the last few decades. At present, liquid fuels are still the primary choice for transport and storage systems. However, in view of their detrimental impact on the environment, it is of the utmost importance to increase the overall efficiency of combustion-driven devices and simultaneously to minimize their environ

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26

Contreras, Espada Jesús [Verfasser]. "Numerical simulation of reacting flows under laminar conditions with detailed chemistry / vorgelegt von Jesús Contreras Espada." 2010. http://d-nb.info/1009368613/34.

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27

Dairo, Adesoji O. "Numerical simulation of immiscible liquid-liquid flows in channels." 2007. http://gateway.proquest.com/openurl?url_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:dissertation&res_dat=xri:pqdiss&rft_dat=xri:pqdiss:3270649.

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28

Ziegler, John Lewis (Jack). "Simulations of Compressible, Diffusive, Reactive Flows with Detailed Chemistry Using a High-Order Hybrid WENO-CD Scheme." Thesis, 2012. https://thesis.library.caltech.edu/6759/1/thesis.pdf.

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<p>A hybrid weighted essentially non-oscillatory (WENO)/centered-difference (CD) numerical method, with low numerical dissipation, high-order shock-capturing, and structured adaptive mesh refinement (SAMR), has been developed for the direct numerical simulation (DNS) of the multicomponent, compressive, reactive Navier-Stokes equations. The method enables accurate resolution of diffusive processes within reaction zones. This numerical method is verified with a series of one- and two-dimensional test problems, including a convergence test of a two-dimensional unsteady reactive double Mach reflec

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29

Braman, Kalen Elvin. "Parametric uncertainty and sensitivity methods for reacting flows." Thesis, 2014. http://hdl.handle.net/2152/25067.

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A Bayesian framework for quantification of uncertainties has been used to quantify the uncertainty introduced by chemistry models. This framework adopts a probabilistic view to describe the state of knowledge of the chemistry model parameters and simulation results. Given experimental data, this method updates the model parameters' values and uncertainties and propagates that parametric uncertainty into simulations. This study focuses on syngas, a combination in various ratios of H2 and CO, which is the product of coal gasification. Coal gasification promises to reduce emissions by replacing t

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30

Sanchez-Gonzalez, Rodrigo. "Advanced Laser Diagnostics Development for the Characterization of Gaseous High Speed Flows." Thesis, 2012. http://hdl.handle.net/1969.1/ETD-TAMU-2012-05-11126.

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The study of high-speed flows represents a challenging problem in the fluid dynamics field due to the presence of chemical reactions and non-equilibrium effects. Hypersonic flights, where speeds reach Mach 5 and above, are particularly influenced by these effects, resulting in a direct impact on the flow and consequently on the aerodynamic performance of a vehicle traveling at these speeds. The study of hypersonic flow conditions requires the experimental capability of determining local temperatures, pressures and velocities using non-intrusive techniques. Furthermore, the simultaneous measure

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31

Σμυρναίος, Δημήτριος Ν. "Διεπιφανειακά φαινόμενα και υδροδυναμικές αστάθειες σε διφασικές ροές". Thesis, 2002. http://nemertes.lis.upatras.gr/jspui/handle/10889/3258.

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32

Donde, Pratik Prakash. "LES/PDF approach for turbulent reacting flows." 2012. http://hdl.handle.net/2152/19481.

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The probability density function (PDF) approach is a powerful technique for large eddy simulation (LES) based modeling of turbulent reacting flows. In this approach, the joint-PDF of all reacting scalars is estimated by solving a PDF transport equation, thus providing detailed information about small-scale correlations between these quantities. The objective of this work is to further develop the LES/PDF approach for studying flame stabilization in supersonic combustors, and for soot modeling in turbulent flames. Supersonic combustors are characterized by strong shock-turbulence interactions

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