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Dissertations / Theses on the topic 'Fluted pumpkin'

Author: Grafiati

Published: 3 June 2025

Last updated: 31 July 2025

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1

Vieira, José António Breyer Rodrigues. "Valorization of pumpkin residue by supercritical extraction of added-value compounds." Master's thesis, Faculdade de Ciências e Tecnologia, 2014. http://hdl.handle.net/10362/12164.

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2

Yang, Ruitao. "Fluid dynamic research on polychaete worm, Nereis diversicolor and its biomimetic applications." Thesis, University of Bath, 2012. https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.558902.

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This thesis is a study of the swimming locomotion of the polychaete worm, Nereis diversicolor. Previous research has shown that there are two distinct jet-like flow regions in the wake of a swimming polychaete worm (Hesselberg 2006). In the first section of this thesis, this flow pattern is studied in greater detail using a high resolution particle image velocimetry (PIV) technique. A small region close to the wave crest of the undulating worm is recorded and the fluid velocity vector fields are plotted. The close-up PIV results show how the jet-like fluid pattern is formed due to the action b

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3

Shaik, Muneeb Ur Rahman. "Gas Dispersion Using an Up-Pumping Maxflo W Impeller." University of Dayton / OhioLINK, 2014. http://rave.ohiolink.edu/etdc/view?acc_num=dayton1398961959.

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4

Roberge, Jennifer Anne. "Use of Computational Fluid Dynamics (CFD) to Model Flow at Pump Intakes." Digital WPI, 1999. https://digitalcommons.wpi.edu/etd-theses/1046.

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"This thesis presents a series of physical experiments and numerical simulations intended to determine whether the use of commercially available computational fluid dynamics (CFD) software may provide a viable alternative to the use of physical models for predicting the occurrence of vortices and swirl in pump intakes. The physical experiments were set up at Alden Research Laboratories, Inc. (ARL) of Holden, Massachusetts, using a simple pump intake model donated by ARL for use in this study. Swirl and velocity measurements and dye injections were used to characterize the flow in the physica

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5

Huston, Davis. "CLOGGING OF FINE SEDIMENT WITHIN GRAVEL SUBSTRATES: MACRO-ANALYSIS AND MOMENTUM-IMPULSE MODEL." UKnowledge, 2014. http://uknowledge.uky.edu/ce_etds/24.

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An understanding of the clogging of fine sediments within gravel substrates is advanced through the use of dimensional analysis and macro-analysis of clogging experiments in hydraulic flumes. Dimensional analysis is used to suggest that the dimensionless clogging depth can be collapsed using the original and adjusted bed-to-grain ratios, substrate porosity, roughness Reynolds number, and Peclet number. Macro-analysis followed by statistical analysis of 146 experimental test results of fine sediment deposition in gravel substrates suggests that the dimensionless clogging depth can be collapsed

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6

Dauparas, Justas. "Stokes flows near boundaries : bacteria, corners, and pumps." Thesis, University of Cambridge, 2018. https://www.repository.cam.ac.uk/handle/1810/277446.

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We investigate flows generated by bacteria near boundaries which are ubiquitous in biological systems. A bacterium such as \textit{Escherichia coli} is equipped with a number of rotary motors on its surface. Every motor has a helical flagellum attached to it and by rotating these motors the bacterium can move the fluid. We consider these flows in four different systems. Firstly, we explore a chiral flow which is always in the clockwise direction (when viewed from above) ahead of a dense suspension of bacteria on a moist surface. We quantitatively test a hypothesis that this flow is due to the

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7

Nkomo, Sithethi Espin. "Using rheometry for prediction the pumping characteristics of highly concentrated W/O emulsion explosives." Thesis, Cape Peninsula University of Technology, 2005. http://hdl.handle.net/20.500.11838/912.

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Dissertation submitted in fulfilment of the requirements for the Masters Degree in Technology: Chemical Engineering in the Department of Chemical Engineering of Cape Peninsula University ofTechnology, 2005<br>The emulsion used for this study is a new thermodynamically unstable multi-component waterin- oil (w/o) explosive type with an internal phase ratio of approximately 94%, i.e. far beyond the close packing limit of spherical droplets of 74%. Economic considerations and the ongoing need for continuous drilling, loading and blasting in the mining industry, has made long-distance pipeline tran

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8

Kilberg, Brianna. "Aqua Ammonia as Secondary Fluid in Ice Rink Applications." Thesis, KTH, Skolan för industriell teknik och management (ITM), 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-281954.

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Refrigerant management is crucial in the attempts to slow climate change. Emissions from the refrigeration sector are primarily due to poor management and unsafe destruction of refrigerants currently in circulation. Safe refrigerant management and improving system operating efficiency can result in a reduction of emissions. Ice rinks are some of the most energy-intensive public buildings, providing both heating and cooling. The major share of energy in an ice rink is the refrigeration system, which consumes about 43%. There are more than 360 ice rinks in Sweden as of 2018 and the most common t

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9

Avon, Michael A. "Fluid Flow Through Carbon Nanotubes: A New Modeling and Simulation Approach." University of Akron / OhioLINK, 2009. http://rave.ohiolink.edu/etdc/view?acc_num=akron1248615375.

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10

Roman, Cristian Robert. "Study of the electromagnetic pumping systems of molten metals and molten salts." Thesis, Grenoble, 2014. http://www.theses.fr/2014GRENI001/document.

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Les préoccupations actuelles concernant l'exploitation sécuritaire des centrales nucléaires existantes et la conception d’architectures spéciales envisagées pour la quatrième génération de réacteurs nucléaires se combinent avec l’intérêt plus prononcé pour l'efficacité et la fiabilité de l'équipement d'un système énergétique. Cela fait que dans un souci de meilleure compréhension et optimisation basée sur des moyens modernes de conception assistée par l’ordinateur, l'étude de différentes parties de ces systèmes fait de plus en plus l’objet de recherches approfondies. . Parmi les types proposés

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11

Hoppe, Mark Mathew. "Validation of computational fluid dynamics model of a simple pump sump with vertical intake." Thesis, Stellenbosch : Stellenbosch University, 2014. http://hdl.handle.net/10019.1/86337.

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Thesis (MScEng)--Stellenbosch University, 2014.<br>ENGLISH ABSTRACT: The designs of pump intake structures are generally verified by means of a hydraulic model study to ensure the structure will operate without large air or swirl entraining vortices. This is an expensive and time consuming process. The popularity of Computational Fluid Dynamics (CFD) is ever increasing in the engineering world and the use thereof in the modelling of flows in pump intake structures is just one of the many areas of focus. The use of a validated CFD model in the design phase of pump intakes would be beneficial, a

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12

Gautam, Prashanta. "Investigation of air-borne noise generation mechanisms in tire noise." University of Akron / OhioLINK, 2017. http://rave.ohiolink.edu/etdc/view?acc_num=akron148552634330808.

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13

Branislava, Nikolovski. "Kinetika i modelovanje ekstrakcije ulja iz bobica kleke (Juniperus communis L.) i semenki tikve (Cucurbita pepo L.) natkritičnim ugljendioksidom." Phd thesis, Univerzitet u Novom Sadu, Tehnološki fakultet Novi Sad, 2009. https://www.cris.uns.ac.rs/record.jsf?recordId=71281&source=NDLTD&language=en.

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U radu su prikazani eksperimentalni rezultati natkritične ekstrakcije etarskog ulja bobicakleke (<em>Juniperus communis</em> L.) i ulja iz semena uljane tikve golice (<em>Cucurbita pepo</em> L.). Ispitan je uticaj pritiska, temperature, stepena usitnjenosti čestica i protoka natkritičnogugljendioksida na promenu prinosa ulja sa vremenom. U cilju poređenja, usitnjeno seme uljane tikve ekstrahovano je i u ekstraktoru većih dimenzija, NOVA-SWISS, Highpressure extraction plant, kao i heksanom i petroletrom u ekstraktoru tipa Sokslet.Praćena je i promena kvaliteta ekstrakata sa vremenom: u etarskom

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14

Яновський, С. Р. "Удосконалення технології перекачування нафти з урахуванням її неньютонівських властивостей". Thesis, Івано-Франківський національний технічний університет нафти і газу, 2010. http://elar.nung.edu.ua/handle/123456789/4414.

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У результаті експериментальних досліджень виявлені закономірності впливу сезонних чинників та температури підігріву на реологічні властивості високов’язкої швидкозастигаючої долинської нафти. Обґрунтовані границі застосування реологічних моделей Шведова-Бінгама і Балклі-Гершеля для опису реологічної поведінки долинської нафти в трубопроводі. Одержані аналітичні залежності граничного динамічного напруження зсуву і пластичної в’язкості від температури підігріву і робочої температури для кожного місяця перекачування. Створена методологія трубопровідної гідродинаміки в’язкопластичних та нелі-нійно

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15

Pellegri, Matteo, Matthew Green, Jill Macpherson, Callan McKay, and Niall Caldwell. "Applying a multi-service digital displacement® pump to an excavator to reduce valve losses." Technische Universität Dresden, 2020. https://tud.qucosa.de/id/qucosa%3A71185.

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Reducing the energy consumption of off-highway machinery due to poor system efficiency is an urgent challenge. Several advanced and innovative architectures have been proposed over the years to tackle this problem, but very few of them found fertile ground for commercial applications due to increased complexity and cost. In this paper, the design, implementation, and testing of a multi-service Digital Displacement ® Pump architecture applied to an excavator are presented. The Digital Displacement ® Pump allows for a dynamic physical displacement allocation to services at different pressure lev

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16

Kärnell, Samuel, Amy Rankka, Alessandro Dell`Amicio, and Liselott Ericson. "Digital pumps in speed-controlled systems – an energy study for a loader crane application." Technische Universität Dresden, 2020. https://tud.qucosa.de/id/qucosa%3A71186.

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Imagine a system with a pump driven by a speed-controlled electric motor. What and how much can be gained by using a pump with discretely variable displacement instead of a conventional fixed pump in such a system? This question is the focus in this paper, in which a simulation study based on a drive cycle for a loader crane is presented. The results indicate that the system efficiency from inverter input to pump output can increase by a few percentages. This might be considered small in relation to the increasing complexity that comes with discrete displacement. However, the results also show

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17

Maitelli, Carla Wilza Souza de Paula. "Simula??o do escoamento monof?sico em um est?gio de uma bomba centr?fuga utilizando t?cnicas de fluidodin?mica computacional." Universidade Federal do Rio Grande do Norte, 2010. http://repositorio.ufrn.br:8080/jspui/handle/123456789/13009.

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Made available in DSpace on 2014-12-17T14:09:12Z (GMT). No. of bitstreams: 1 CarlaWSPM_TESE.pdf: 2776724 bytes, checksum: 01c7ecc751890604c65e9e388d7b0cb3 (MD5) Previous issue date: 2010-12-17<br>Oil production and exploration techniques have evolved in the last decades in order to increase fluid flows and optimize how the required equipment are used. The base functioning of Electric Submersible Pumping (ESP) lift method is the use of an electric downhole motor to move a centrifugal pump and transport the fluids to the surface. The Electric Submersible Pumping is an option that has been gain

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18

Haugen, Christina G. M. "Numerical Investigation of Thermal Performance for Rotating High Aspect Ratio Serpentine Passages." The Ohio State University, 2014. http://rave.ohiolink.edu/etdc/view?acc_num=osu1412698677.

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19

Hoa, Pham Trong, and Nguyen Manh Hung. "Numerical calculation of dynamic stiffness and damping coefficients of oil lubrication film in internal gear motors and pumps." Technische Universität Dresden, 2020. https://tud.qucosa.de/id/qucosa%3A71107.

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Oil lubrication film plays an important role in analysis of dynamic behavior of the internal gear motors and pumps. During operation, the oil film is considered as the spring and damping system. Therefore, calculation of the dynamic stiffness and damping coefficients is necessary to build the mathematical model for studying of dynamic problem. In order to calculate these coefficients, the dynamic pressure and perturbing pressure distribution must be determined firstly. In this paper, the infinitesimal perturbation method (IFP) is used to calculate the dynamic pressure distribution. Based on th

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20

Döhla, Werner, Jörg Bauer, and Rocco Kemnitz. "Integrated smart hydraulic displacement machine for closed systems." Technische Universität Dresden, 2020. https://tud.qucosa.de/id/qucosa%3A71225.

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The following article describes the development, validation and series introduction of a novel highly integrated smart electrohydraulic 4-quadrant displacement machine. Starting in 2012, an unique unit consisting of a hydraulic internal gear machine combined with a newly developed electric machine with integrated electronic unit was created. The developed unit aims at the application in fully active automotive chassis in combination with hydraulic shock absorbers. The very special requirements of this application resulted in a new development with numerous detailed solutions which are describe

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21

Morganti, Teresa Maria. "In situ direct study of filtration and respiration rate of Mediterranean sponges = Estudio in situ de la filtración y la respiración de esponjas mediterráneas." Doctoral thesis, Universitat Politècnica de Catalunya, 2016. http://hdl.handle.net/10803/397747.

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Sponges play important roles in the functioning of marine ecosystem in which they are abundant. These roles range from stabilizers of substrate, to acting as major link between benthic and pelagic realms by filtering large quantities of water and retaining the particles with high efficiency. Despite sponges have been the focus of much interest in the past years our knowledge on sponge physiology is still poorly understood. This study focused on ecophysiology of five of the most prominent sponge species dwelling the coralligenous community in the NW Mediterranean Sea, and employed an energetic

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22

Abuhaiba, Mohammad. "Mathematical Modeling and Analysis of a Variable Displacement Hydraulic Bent Axis Pump Linked to High Pressure and Low Pressure Accumulators." Connect to full text in OhioLINK ETD Center, 2009. http://rave.ohiolink.edu/etdc/view?acc_num=toledo1240528916.

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Dissertation (Ph.D.)--University of Toledo, 2009.<br>Typescript. "Submitted as partial fulfillment of the requirements for the Doctor of Philosophy degree in Mechanical Engineering." Bibliography: leaves 203-209.

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23

Tsai, Yun-Fang, and 蔡昀芳. "Research of Self-Pumping Fluid Glucose Oxidase Enzymatic Fuel Cell." Thesis, 2014. http://ndltd.ncl.edu.tw/handle/40780749406889348350.

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碩士<br>國立中興大學<br>精密工程學系所<br>102<br>A self-pumping fluid glucose oxidase enzymatic fuel cell was designed and fabricated. Fuel was driven into the fuel cell by capillary effect without any external pump. Fuel cell structure design included both end plate and flow channel plate. Three reservoirs are fabricated onto the end plate. And Cotton cloth was placed into the reservoirs. A particular flow channel was designed to obtain a uniform parallel flow field. The cross sectional area was decreased from central channel to inlet and outlet channel. The flow channel plate was fabricated by electroformi

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24

Bunn, Thomas Francis. "Modelling the pumping characteristics of power station ash in a dense phase hydraulic conveying system." Thesis, 2016. http://hdl.handle.net/1959.13/1309700.

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Research Doctorate - Doctor of Philosophy (PhD)<br>This study examines the flow of dense phase fly ash slurries in horizontal pipes. It includes an evaluation of the previous work, a rigorous experimental investigation, a new and original model for determining pipeline pressure drop characteristics and a new method of characterising typically homogeneous fluid behaviour based on a particle size distribution, slope factor and a median particle size. The experimental investigation was undertaken to obtain data for modelling the flow of dense phase fly ash slurries. Tests were conducted using fly

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25

Usha, S. "Peristaltic Transport Of Biofluids." Thesis, 1995. https://etd.iisc.ac.in/handle/2005/1735.

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26

Usha, S. "Peristaltic Transport Of Biofluids." Thesis, 1995. http://etd.iisc.ernet.in/handle/2005/1735.

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27

Mishra, Manoranjan. "Peristaltic Flows With Some Applications." Thesis, 2004. http://hdl.handle.net/2005/339.

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Peristalsis is a mechanism of pumping fluids in ducts when a progressive wave of area contraction or expansion propagates along the length of a distensible tube containing fluid. It induces in general propulsive and mixing movements and pumps the fluids against pressure rise. Physiologically, peristaltic action is an inherent property of smooth muscle contraction. It is an automatic and vital process that drives the urine from the kidney to the bladder, food through the digestive tract, bile from the gall-bladder into the duodenum, movement of ovum in the fallopian tube and many other situatio

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28

Mishra, Manoranjan. "Peristaltic Flows With Some Applications." Thesis, 2004. https://etd.iisc.ac.in/handle/2005/339.

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Peristalsis is a mechanism of pumping fluids in ducts when a progressive wave of area contraction or expansion propagates along the length of a distensible tube containing fluid. It induces in general propulsive and mixing movements and pumps the fluids against pressure rise. Physiologically, peristaltic action is an inherent property of smooth muscle contraction. It is an automatic and vital process that drives the urine from the kidney to the bladder, food through the digestive tract, bile from the gall-bladder into the duodenum, movement of ovum in the fallopian tube and many other situatio

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29

Herold, Maria. "Investigation of contaminant mass fluxes and reactive transport modelling of heterocyclic hydrocarbons at former gasworks sites." Doctoral thesis, 2009. http://hdl.handle.net/11858/00-1735-0000-0006-B2EC-8.

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30

Μανόπουλος, Χρήστος. "Μελέτη αντλητικών φαινομένων σε ιατροβιολογικές εφαρμογές, μέσω αλληλεπίδρασης ροής ρευστού και κίνησης σώματος". Thesis, 2009. http://nemertes.lis.upatras.gr/jspui/handle/10889/2490.

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Φαινόμενα άντλησης με ή χωρίς βαλβίδες εξετάζονται πειραματικά και θεωρητικά μέσω κυλινδρικών εύκαμπτων αγωγών. Το φαινόμενο της άντλησης ρευστού χωρίς βαλβίδες μελετάται πειραματικά σε κλειστό βρόχο αποτελούμενο από δύο αγωγούς, έναν εύκαμπτο και έναν άκαμπτο. Αναπτύσσεται μη μηδενική μέση χρονικά παροχή ρευστού όταν διεγείρεται τμήμα του εύκαμπτου αγωγού σε συγκεκριμένες συχνότητες και πλάτη διέγερσης. Η διέγερση επιτυγχάνεται μέσω συμπίεσης και αποσυμπίεσης του εύκαμπτου αγωγού από έναν κατάλληλο παλινδρομικό μηχανισμό. Εξετάζονται τέσσερις παράμετροι επιρροής του φαινομένου, η συχνότητα, τ

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31

"Volume 1 – Symposium." Technische Universität Dresden, 2020. https://tud.qucosa.de/id/qucosa%3A70916.

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We are pleased to present the conference proceedings for the 12th edition of the International Fluid Power Conference (IFK). The IFK is one of the world’s most significant scientific conferences on fluid power control technology and systems. It offers a common platform for the presentation and discussion of trends and innovations to manufacturers, users and scientists. The Chair of Fluid-Mechatronic Systems at the TU Dresden is organizing and hosting the IFK for the sixth time. Supporting hosts are the Fluid Power Association of the German Engineering Federation (VDMA), Dresdner Verein zur För

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