To see the other types of publications on this topic, follow the link: Active flow.

Dissertations / Theses on the topic 'Active flow'

Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles

Select a source type:

Consult the top 50 dissertations / theses for your research on the topic 'Active flow.'

Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.

You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.

Browse dissertations / theses on a wide variety of disciplines and organise your bibliography correctly.

1

Gissen, Abraham Naroll. "Active flow control in high-speed internal flows." Diss., Georgia Institute of Technology, 2015. http://hdl.handle.net/1853/54865.

Full text
Abstract:
Manipulation of high-speed duct flow by streamwise vorticity concentration that are engendered by interactions of surface-mounted passive and active flow control actuators with the cross flow is investigated experimentally in a small-scale wind tunnel. The controlled formation of these streamwise vortices can be a key element in the mitigation of the adverse flow effects in a number of applications including aero-optical aberrations owing to unsteady local transonic shocks, pressure recovery and distortion due to secondary flows in embedded propulsion system, thrusts reversal and augmentation
APA, Harvard, Vancouver, ISO, and other styles
2

Inyiama, Fidelis Chidozie. "Active control of hydrodynamic slug flow." Thesis, Cranfield University, 2013. http://dspace.lib.cranfield.ac.uk/handle/1826/7996.

Full text
Abstract:
Multiphase flow is associated with concurrent flow of more than one phase (gas-liquid, liquid-solid, or gas-liquid-solid) in a conduit. The simultaneous flow of these phases in a flow line, may initiate a slug flow in the pipeline. Hydrodynamic slug flow is an alternate or irregular flow with surges of liquid slug and gas pocket. This occurs when the velocity difference between the gas flow rate and liquid flow rate is high enough resulting in an unstable hydrodynamic behaviour usually caused by the Kelvin-Helmholtz instability. Active feedback control technology, though found effective for th
APA, Harvard, Vancouver, ISO, and other styles
3

Mitran, Marcel. "Active surface reconstruction from optical flow." Thesis, McGill University, 2001. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=33980.

Full text
Abstract:
This thesis describes the design and implementation of an active surface reconstruction algorithm for two-frame image sequences. The objective is to build a system that uses a passive sensor and an active viewer to accumulate information for disambiguating the depth sampling process involved in surface reconstruction. The viewer is considered to be restricted to a short baseline. Several ideas from the fields of optical flow, stereovision, and shape from motion will be drawn from and modified in the context of an active vision system.<br>The thesis begins by examining the optical flow estimati
APA, Harvard, Vancouver, ISO, and other styles
4

Sarwar, Wasim. "Active flow control methods for aerodynamic applications." Doctoral thesis, Universitat Politècnica de Catalunya, 2020. http://hdl.handle.net/10803/669325.

Full text
Abstract:
The cylinder in cross flow has been the subject of many numerical and experimental studies since it provides a deep insight of the physical phenomena occurring in a wide range of flow regimes. Despite a number of investigations at Reynolds number (Re = 3900), there has been a constant debate on the important aspects of the flow such as spanwise resolutions, lateral domain extent, convergence of turbulent statistics in the near wake, the so called U-V streamwise velocity profiles at x = 1D, where D is the cylinder diameter, and the critical Re for the onset of shear layer instability together
APA, Harvard, Vancouver, ISO, and other styles
5

Erler, Engin. "Active Flow Control Studies Over An Elliptical Profile." Master's thesis, METU, 2008. http://etd.lib.metu.edu.tr/upload/3/12609980/index.pdf.

Full text
Abstract:
Active flow control by a jet over a 12.5% thick elliptic profile is investigated numerically. Unsteady flowfields are calculated with a Navier Stokes solver. The numerical method is first validated without the jet and with the presence of steady-blowing and pulsating jets. Three jet types, namely steady, pulsating and synthetic jets, are next compared with each other and it is shown that the most drag reduction is achieved by a synthetic jet and the most lift enhancement is achieved by a steady jet. The influences of the jet location, the jet velocity, the jet frequency, the jet slot length an
APA, Harvard, Vancouver, ISO, and other styles
6

Sivertsen, Heidi. "Stabilization of desired flow regimes : using active control." Doctoral thesis, Norges teknisk-naturvitenskapelige universitet, Institutt for kjemisk prosessteknologi, 2008. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-5201.

Full text
APA, Harvard, Vancouver, ISO, and other styles
7

Williams, Nathan M. "Active flow control on a nonslender delta wing." Thesis, University of Bath, 2009. https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.501373.

Full text
Abstract:
The effects of active flow control by oscillatory blowing at the leading edge of a nonslender delta wing with a Λ=50° sweep angle have been investigated. Pressure measurements and Particle Image Velocimetry measurements were conducted on a half wing to investigate the formation of leading edge vortices for oscillatory blowing, compared to the stalled flow for the no blowing case. Stall has been delayed by up to 8, and significant increases in the upper surface suction force have been observed. Velocity measurements show that shear layer reattachment is promoted with forcing, and a vortex flow
APA, Harvard, Vancouver, ISO, and other styles
8

Luong, Sanh B. "Numerical investigations of turbulent flow past a rectangular cylinder with active flow control." Thesis, California State University, Long Beach, 2016. http://pqdtopen.proquest.com/#viewpdf?dispub=10004172.

Full text
Abstract:
<p> The objective of the present research was to investigate the effects of rotating circular cylinders to control high intensity wind load. This research used computational fluid dynamics (CFD) to simulate high Reynolds number gust-like wind load condition for a transient duration of 12 seconds across a three-dimensional rectangular cylinder with dimension of 240x15x7 meters and aspect ratio (Breadth/Height) of 2.3. An array of 20 circular cylinders was positioned along the leading edges of the rectangular bridge cylinder. The research analyzed turbulent flow characteristics across the to
APA, Harvard, Vancouver, ISO, and other styles
9

Gaurav. "Application of active flow control technology in an unmanned aerial vehicle." Thesis, [College Station, Tex. : Texas A&M University, 2007. http://hdl.handle.net/1969.1/ETD-TAMU-1558.

Full text
APA, Harvard, Vancouver, ISO, and other styles
10

Miranda, Sergio. "Active Control of Separated Flow over a Circular-Arc Airfoil." Thesis, Virginia Tech, 2000. http://hdl.handle.net/10919/34411.

Full text
Abstract:
An experimental study of active control of fully separated flow over a symmetrical circular-arc airfoil at high angles of attack was performed. The experiments were carried out in a low-speed, open circuit wind tunnel. Angles of attack from 10 to 40 degrees were tested. Low-power input, unsteady excitation was applied to the leading or trailing edge shear layers. The actuation was provided by the periodic oscillation of a 4-percent-chord flap placed on the suction side of the airfoil and facing the sharp edge. Vortex-shedding frequencies were measured and harmonic combinations selected as the
APA, Harvard, Vancouver, ISO, and other styles
11

Aland, Sebastian. "Modelling of two-phase flow with surface active particles." Doctoral thesis, Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2012. http://nbn-resolving.de/urn:nbn:de:bsz:14-qucosa-92397.

Full text
Abstract:
Kolloidpartikel die von zwei nicht mischbaren Fluiden benetzt werden, tendieren dazu sich an der fluiden Grenzfläche aufzuhalten um die Oberflächenspannung zu minimieren. Bei genügender Anzahl solcher Kolloide werden diese zusammengedrückt und lassen die fluide Grenzfläche erstarren. Das gesamte System aus Fluiden und Kolloiden bildet dann eine spezielle Emulsion mit interessanten Eigenschaften. In dieser Arbeit wird ein kontinuum Model für solche Systeme entwickelt, basierend auf den Prinzipien der Massenerhaltung und der themodynamischen Konsistenz. Dabei wird die makroskopische Zwei-Phasen-
APA, Harvard, Vancouver, ISO, and other styles
12

Kamps, Nathan George. "Active control of subsonic cavity flow using plasma actuators." Connect to resource, 2007. http://hdl.handle.net/1811/25082.

Full text
Abstract:
Thesis (Honors)--Ohio State University, 2007.<br>Title from first page of PDF file. Document formatted into pages: contains x, 56 p.; also includes graphics. Includes bibliographical references (p. 47-48). Available online via Ohio State University's Knowledge Bank.
APA, Harvard, Vancouver, ISO, and other styles
13

Welborne, Nathaniel Bryan, Faisal Al-Mahmoud, Khalid Mustafawi, and Cory Pearman. "SCALED MODEL WIND TURBINE WITH ACTIVE FLOW CONTROL TECHNOLOGY." Thesis, The University of Arizona, 2009. http://hdl.handle.net/10150/193022.

Full text
APA, Harvard, Vancouver, ISO, and other styles
14

Ring, Emma. "Modelling a piezoelectric-driven actuator for active flow control." Thesis, Linköpings universitet, Reglerteknik, 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-114957.

Full text
Abstract:
Flow control is an area of research of particular interest within automotive and aerospace industries since methods used to affect the fluid flow around vehicles can reduce drag and therefore lower their fuel consumption. One of these methods, which has generated a lot of interest in later years, is called active flow control and uses different types of actuators to impact the surrounding flow. In this thesis a model of a piezoelectric actuator for active flow control has been developed using Lumped Element Modelling and equivalent circuits. This approach, together with the chosen software for
APA, Harvard, Vancouver, ISO, and other styles
15

Szoke, Matthew. "Trailing edge noise control using active flow control methods." Thesis, University of Bristol, 2019. http://hdl.handle.net/1983/e45a9e22-3146-4467-90c4-01d3b6aebeb3.

Full text
Abstract:
Active flow control methods are investigated experimentally with the aim of reducing the trailing edge noise on a zero pressure gradient flat plate test rig. Flush-mounted microphones are embedded in the wall of the plate between the flow control section and the trailing edge to study the surface pressure fluctuations exposed on the wall by the turbulent boundary layer. Three different types of active flow control techniques are considered, namely uniform inclined flow suction, uniform inclined flow injection and inclined transverse jets. The velocity statistics reveal that inclined flow sucti
APA, Harvard, Vancouver, ISO, and other styles
16

Bae, Jinwoo W. "Active control of tip clearance flow in axial compressors." Thesis, Massachusetts Institute of Technology, 2001. http://hdl.handle.net/1721.1/8705.

Full text
Abstract:
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Aeronautics and Astronautics, 2001.<br>Includes bibliographical references.<br>Control of compressor tip clearance flows is explored in a linear cascade using three types of fluidic actuators; Normal Synthetic Jet (NSJ; unsteady jet normal to the mean flow with zero net mass flux), Directed Synthetic Jet (DSJ; injection roughly aligned with the mean flow), and Steady Directed Jet (SDJ), mounted on the casing wall. The objective is to affect the following measures: (1) reduction of tip leakage flow rate, (2) mixing enhancement bet
APA, Harvard, Vancouver, ISO, and other styles
17

Whiteman, Jacob T. "Active Flow Control Schemes for Bluff Body Drag Reduction." The Ohio State University, 2016. http://rave.ohiolink.edu/etdc/view?acc_num=osu1452184221.

Full text
APA, Harvard, Vancouver, ISO, and other styles
18

Pastrikakis, Vasileios. "Flow control on helicopter rotors using active gurney flaps." Thesis, University of Liverpool, 2015. http://livrepository.liverpool.ac.uk/2013680/.

Full text
Abstract:
This thesis presents closed loop control of active Gurney flaps on rotors. Firstly, it builds on the Helicopter Multi-Block 2 CFD solver of the University of Liverpool and demonstrates the implementation and use of Gurney flaps on wings, and rotors. The idea is to flag any cell face within the computational mesh with a solid, no slip boundary condition. Hence the infinitely thin Gurney can be approximated by “blocking cells” in the mesh. Comparison between thick Gurney flaps and infinitely thin Gurneys showed no difference on the integrated loads, the same flow structure was captured and the s
APA, Harvard, Vancouver, ISO, and other styles
19

Dearing, Stella. "Electro-active polymer (EAP) dimple actuators for flow control." Thesis, Imperial College London, 2008. http://hdl.handle.net/10044/1/11995.

Full text
Abstract:
The design and fabrication of electro-active polymers (EAP) actuators, in the form of active dimples is described. Active dimples alter the flow by creating time-dependent vorticity flux at the wall, by virtue of changes in surface pressure gradients and local surface accelerations. Potential elastomer films for the EAP dielectric are evaluated. It was found that elastomers could not be characterised using uniaxial testing. Instead biaxial testing, in the form of bulge tests, was carried out. Electro-mechanical tests are used to evaluate the dielectric breakdown strength and strain at differen
APA, Harvard, Vancouver, ISO, and other styles
20

Mahnken, Brian W. "Active structural acoustic control of aircraft interior flow noise via the use of active trim panels." Thesis, This resource online, 1996. http://scholar.lib.vt.edu/theses/available/etd-11012008-063701/.

Full text
APA, Harvard, Vancouver, ISO, and other styles
21

Weiss, Michael. "Surfactant adsorption and Marangoni flow in liquid jets." Thesis, University of Oxford, 2004. http://ora.ox.ac.uk/objects/uuid:7e313dbf-30b6-4ad7-8607-c75e89b084eb.

Full text
APA, Harvard, Vancouver, ISO, and other styles
22

Bennani, Patrick. "Development and optimazation of synthetic jets for active flow control." Thesis, KTH, Processteknisk strömningsmekanik, 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-29603.

Full text
APA, Harvard, Vancouver, ISO, and other styles
23

Gonidou, Luc-Olivier. "Active control of flexural power flow in elastic thin beams." Thesis, This resource online, 1988. http://scholar.lib.vt.edu/theses/available/etd-09052009-040314/.

Full text
APA, Harvard, Vancouver, ISO, and other styles
24

Adolfsson, Sebastian. "Expanding operation ranges using active flow control in Francis turbines." Thesis, Umeå universitet, Institutionen för tillämpad fysik och elektronik, 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-90392.

Full text
Abstract:
This report contains an investigation of fluid injection techniques used in the purpose of reducing deleterious flow effects occurring in the draft tube of Francis turbines when operating outside nominal load. There is a focus on implement ability at Jämtkrafts hydroelectric power plants and two power plants were investigated, located in series with each other named Lövhöjden and Ålviken. The only profitable scenario found with some degree of certainty was an increase in the operating range upwards to allow overload operation. Findings show that both air and water can be introduced in various
APA, Harvard, Vancouver, ISO, and other styles
25

Harrison, Neal A. "Active Flow Control of a Boundary Layer Ingesting Serpentine Diffuser." Thesis, Virginia Tech, 2005. http://hdl.handle.net/10919/34163.

Full text
Abstract:
The use of serpentine boundary layer ingesting (BLI) diffusers offers a significant benefit to the performance of Blended Wing Body aircraft. However, the inherent diffuser geometry combined with a thick ingested boundary layer creates strong secondary flows that lead to severe flow distortion at the engine face, increasing the possibility of engine surge. This study investigated the use of enabling active flow control methods to reduce engine-face distortion. An ejector-pump based system of fluidic actuators was used to directly manage the diffuser secondary flows. This system was modeled co
APA, Harvard, Vancouver, ISO, and other styles
26

Castañeda, Vergara David Armando. "Active Control of Flow over an Oscillating NACA 0012 Airfoil." The Ohio State University, 2020. http://rave.ohiolink.edu/etdc/view?acc_num=osu1587420875168203.

Full text
APA, Harvard, Vancouver, ISO, and other styles
27

Bottomley, M. "Optimisation of robust active flow control technologies for motorsport applications." Thesis, University of Surrey, 2015. http://epubs.surrey.ac.uk/809435/.

Full text
Abstract:
Active flow control systems have the potential to allow future designs of ground vehicles and aircraft to realise increased operational efficiency through improved optimisation of the flow, leading to decreased fuel use and reduced environmental impact. To achieve this, dynamic actuators are required that can adapt to the changing conditions experienced over low-speed, high-lift aerofoils where separation control can be particularly advantageous. Synthetic Jet Actuators (SJAs) are a form of the technology that shows promise; they are small, low-mass and low-power devices, which means that they
APA, Harvard, Vancouver, ISO, and other styles
28

Erdem, Erinc. "Active flow control studies at Mach 5 : measurement and computation." Thesis, University of Manchester, 2011. https://www.research.manchester.ac.uk/portal/en/theses/active-flow-control-studies-at-mach-5-measurement-and-computation(73c02044-d17c-418d-821e-9e756b7cabbf).html.

Full text
Abstract:
The difficulties regarding the control of high velocity flying vehicles in supersonic/hypersonic flight regime are still prevailing. Whether it is mixing enhancement,side force generation or aerodynamic steering, wall cooling or any otherfavourable method to control the flow, the resultant effects of different flow controltechniques on the associated flowfield demands careful experimental and numericalinvestigations. Traditional aerodynamic control surfaces are subjected tosevere flight conditions and loadings in different flight regimes resulting in impairedthe control effectiveness. Active f
APA, Harvard, Vancouver, ISO, and other styles
29

Kartha, Satish Chandrashekhar. "Active, Passive and Active/Passive Control Techniques For Reduction of Vibrational Power Flow in Fluid Filled Pipes." Thesis, Virginia Tech, 2000. http://hdl.handle.net/10919/31156.

Full text
Abstract:
The coupled nature of vibrational energy flow in fluid filled piping systems makes its control and subsequent reduction a difficult problem. This work experimentally explores the potential of different active, passive and active/passive control methodologies for control of vibrational power flow in fluid filled pipes. Circumferential modal decomposition and measurements of vibrational power carried by individual wave types were carried out experimentally. The importance of dominant structural bending waves and the need to eliminate them in order to obtain meaningful experimental results has be
APA, Harvard, Vancouver, ISO, and other styles
30

Tarama, Mitsusuke. "Dynamics of active deformable particle - Two types of active spinning motions and dynamics in external flow field -." 京都大学 (Kyoto University), 2015. http://hdl.handle.net/2433/199091.

Full text
APA, Harvard, Vancouver, ISO, and other styles
31

Leahy, Scott B. "Active Flow Control of Lab-Scale Solid Polymer Electrolyte Fuel Cells." Thesis, Georgia Institute of Technology, 2004. http://hdl.handle.net/1853/5188.

Full text
Abstract:
The effects of actively pulsing reactant flow rates into solid polymer electrolyte fuel cells were investigated in this thesis. First, work was conducted to determine the magnitude of voltage response to pulsed reactant flow on a direct hydrogen proton exchange membrane (PEM) cell. The effects of pulsed reactant flow into a direct methanol fuel cell (DMFC) were then considered. The PEM work showed substantially greater response to pulsed air flow than to pulsed fuel flow. It was found that several parameters affect the magnitude of cell response to active flow control (AFC). Increasing cu
APA, Harvard, Vancouver, ISO, and other styles
32

Kuchan, Abigail. "The integration of active flow control devices into composite wing flaps." Thesis, Georgia Institute of Technology, 2012. http://hdl.handle.net/1853/44758.

Full text
Abstract:
Delaying stall is always an attractive option in the aerospace industry. The major benefit of delaying stall is increased lift during takeoff and landings as well as during high angle of attack situations. Devices, such as fluidic oscillators, can be integrated into wing flaps to help delay the occurrence of stall by adding energized air to the airflow on the upper surface of the wing flap. The energized air from the oscillator allows the airflow to remain attached to the upper surface of the wing flap. The fluidic oscillator being integrated in this thesis is an active flow control device (A
APA, Harvard, Vancouver, ISO, and other styles
33

Stark, Colin Peter. "The influence of active extensional tectonics on patterns of fluid flow." Thesis, University of Leeds, 1991. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.305934.

Full text
APA, Harvard, Vancouver, ISO, and other styles
34

Kirk, Aaron Michael. "Active flow control in an advanced serpentine jet engine inlet duct." [College Station, Tex. : Texas A&M University, 2006. http://hdl.handle.net/1969.1/ETD-TAMU-1027.

Full text
APA, Harvard, Vancouver, ISO, and other styles
35

Wang, Wei. "Passive and active flow control studies using hybrid RANS/LES methods." Thesis, University of Sheffield, 2013. http://etheses.whiterose.ac.uk/4523/.

Full text
Abstract:
Turbulent flow control of three types of flow is numerically studied using hybrid RANS/LES approaches. Flow control effect and control mechanisms are studied through both instantaneous and statistically-averaged flow properties. Behaviours of hybrid RANS/LES methods in these three types of flow are also investigated. Flow over a backward facing step is investigated, with piezoelectric actuators implemented on the step to control flow separation and recirculation. The simulation results agree well with the experiments. For the controlled flow, a slightly reduced primary recirculation between tw
APA, Harvard, Vancouver, ISO, and other styles
36

Gonzalez, Garcia Veronica Palma. "Modelling of active flow control devices using hybrid RANS/LES techniques." Thesis, University of Sheffield, 2016. http://etheses.whiterose.ac.uk/12158/.

Full text
Abstract:
The focus of the present thesis is on the effects of two active flow control devices on the periodic components of the turbulent shear layers and the Reynolds stresses. One of the main aims is to demonstrate the capability to control individual structures that are larger in scale and lower in frequency against the richness of the time and spatial scales in a turbulent boundary layer. In order to carry out this investigation, computational fluid dynamics CFD simulations are performed. The turbulence modelling approach for the two dimensional initial cases is RANS and URANS and with regards to 3
APA, Harvard, Vancouver, ISO, and other styles
37

POONDRU, SHIRDISH. "Large-Eddy Simulation and Active Flow Control of Low-Reynolds Number Flow through a Low-Pressure Turbine Cascade." University of Cincinnati / OhioLINK, 2008. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1204873699.

Full text
APA, Harvard, Vancouver, ISO, and other styles
38

Louka, Patrick Alain. "Advanced Thermal Management of High Temperature Fuel Cells via Active Flow Control." Thesis, Georgia Institute of Technology, 2007. http://hdl.handle.net/1853/14526.

Full text
Abstract:
The ultimate objective of this research is to investigate the effectiveness of cathode gas (air) recirculation for the thermal management of a solid oxide fuel cell (SOFC) stack. SOFCs conventionally operate at high temperatures (>600o C); and recovering heat from stack exhaust is critical to improving the stack and system performance. Prevalent approaches implement bulky and expensive high temperature gas-to-gas heat exchangers. Also, ejectors are being investigated for recirculation of the air; however, an ejector with typically large velocity gradients would incur large viscous losses.
APA, Harvard, Vancouver, ISO, and other styles
39

Ramakumar, Karthik. "ACTIVE FLOW CONTROL OF LOW PRESSURE TURBINE BLADE SEPARATION USING PLASMA ACTUATORS." UKnowledge, 2006. http://uknowledge.uky.edu/gradschool_theses/359.

Full text
Abstract:
The current study examines plasma actuators as flow control devices. The actuators are placed on a turbine blade profile in a 2D turbine cascade for separation flow control. The configuration involves copper strips separated by a layer of dielectric material, across which an AC electric potential in the range of 5 kHz and 5 kV is applied. The efficiency of the actuator is monitored by measuring power input and flow control effectiveness. Preliminary observations are performed for a quiescent case on a flat plate profile to analyze the average and instantaneous velocities generated by the actua
APA, Harvard, Vancouver, ISO, and other styles
40

Gibbs, Gary P. "Simultaneous active control of flexural and extension power flow in thin beams." Diss., Virginia Tech, 1993. http://hdl.handle.net/10919/40186.

Full text
Abstract:
The primary goal of this dissertation consisted of two related parts. The first was to develop an analytical basis for predicting the active control of flexural and extensional power flow in thin semi-infinite and finite beams using piezoelectric actuators and sensors. The second part was to experimentally demonstrate these techniques applied to actual beam systems. In order to maintain total control authority over the system, the control actuators must be able to adequately excite both flexural and extensional motion in the beam. Accurate sensing or estimation of the actual power flow (or var
APA, Harvard, Vancouver, ISO, and other styles
41

Albers, Marian [Verfasser]. "Numerical Analysis of Active Drag Reduction for Turbulent Airfoil Flow / Marian Albers." München : Verlag Dr. Hut, 2021. http://d-nb.info/1238422896/34.

Full text
APA, Harvard, Vancouver, ISO, and other styles
42

Tan, Delfinn Sweimay. "Are the Swimming Kinematics of Blind Cavefish Adapted for Active Flow-sensing?" Bowling Green State University / OhioLINK, 2010. http://rave.ohiolink.edu/etdc/view?acc_num=bgsu1276198298.

Full text
APA, Harvard, Vancouver, ISO, and other styles
43

Packard, Nathan Owen. "Active Flow Separation Control of a Laminar Airfoil at Low Reynolds Number." The Ohio State University, 2012. http://rave.ohiolink.edu/etdc/view?acc_num=osu1338315982.

Full text
APA, Harvard, Vancouver, ISO, and other styles
44

Xia, Qingfeng. "Enhancement of liquids mixing using active pulsation in the laminar flow regime." Thesis, University of Manchester, 2012. https://www.research.manchester.ac.uk/portal/en/theses/enhancement-of-liquids-mixing-using-active-pulsation-in-the-laminar-flow-regime(bcb5ff26-11c4-4301-bdc1-9cae46f46580).html.

Full text
Abstract:
Both the need for mixing highly viscous liquids more effectively and the advance of micro-scale applications urge the development of technologies for liquid mixing at low Reynolds numbers. However, currently engineering designs which offer effective jet mixing without structural and operational complexity are still lacking. In this project, the method of enhancing liquid mixing using active pulsation in the laminar flow regime is explored experimentally. This work started by improving the inline pulsation mechanism in an existing confined jet configuration whereby the fluid from a primary plan
APA, Harvard, Vancouver, ISO, and other styles
45

Davidson, Reichenbach Rebecca Sue. "Surfing the Semester: A Study of the Flow of Active Learning Implementation." Thesis, North Dakota State University, 2017. https://hdl.handle.net/10365/28420.

Full text
Abstract:
Instructional reforms have been called for on a national level. Little data exists as to how changes take place. This study explored the implementation of active learning practices by non-tenure and tenure track faculty over the course of a semester. Faculty were introduced to evidence based pedagogy through workshops and faculty learning communities. Their instructional practices within a semester were tracked through observations conducted using the Classroom Observation Protocol for Undergraduate STEM (COPUS). Interviews were conducted to gain insight into reasons for instructional trends.
APA, Harvard, Vancouver, ISO, and other styles
46

Grigoriev, Igor. "Turbulence modeling of compressible flows with large density variation." Doctoral thesis, KTH, Turbulens, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-183452.

Full text
Abstract:
In this study we highlight the influence of mean dilatation and mean density gradient on the Reynolds stress modeling of compressible, heat-releasing and supercritical turbulent flows.Firstly, the modeling of the rapid pressure-strain correlation has been extended to self-consistently account for the influence of mean dilatation.Secondly, an algebraic model for the turbulent density flux has been developed and coupled to the tensor equationfor Reynolds stress anisotropy via a 'local mean acceleration',a generalization of the buoyancy force. We applied the resulting differential Reynolds stress
APA, Harvard, Vancouver, ISO, and other styles
47

Kumar, Deepak. "Numerical simulation of flows in an active air intake device of internal combustion engine with pulsated air flow." Thesis, Ecole centrale de Nantes, 2018. http://www.theses.fr/2018ECDN0004/document.

Full text
Abstract:
Les émissions polluantes à l’échappement des véhicules automobiles sont l'une des principales sources de pollution de l'air dans le monde d'aujourd'hui. Par conséquent, la législation a évolué afin de limiter ces émissions. L'un des aspects clés pour répondre consiste à bien maîtriser les échanges gazeux au sein du moteur à combustion interne. Cette amélioration est possible par l'optimisation de répartiteurs d'admission d'air. Dans ces répartiteurs d'admission d'air, la maitrise de l’écoulement de type tumble est une piste de progrès. Des volets sont installés à la sortie du répartiteur afin
APA, Harvard, Vancouver, ISO, and other styles
48

Ding, Chen. "Methodologies for active control of free shear flows." Diss., This resource online, 1995. http://scholar.lib.vt.edu/theses/available/etd-08272007-163739/.

Full text
APA, Harvard, Vancouver, ISO, and other styles
49

Yugulis, Kevin Lee. "High Subsonic Cavity Flow Control Using Plasma Actuators." The Ohio State University, 2012. http://rave.ohiolink.edu/etdc/view?acc_num=osu1345552086.

Full text
APA, Harvard, Vancouver, ISO, and other styles
50

Fieger, Sarah M. "Adenosine receptors in cutaneous thermal hyperemia and active vasodilation in humans." Thesis, Kansas State University, 2011. http://hdl.handle.net/2097/8762.

Full text
Abstract:
Master of Science<br>Department of Kinesiology<br>Brett J. Wong<br>Mechanisms underlying the cutaneous vasodilation response to local skin heating and whole body heating in humans remain unresolved. Although nitric oxide (NO) is known to contribute to these responses, it remains unclear as to the source of NO. Adenosine receptors induce vasodilation in many human tissues and may work, in part, through NO. As these receptors are also known to be located in the cutaneous vasculature, the studies contained in this thesis were designed to investigate a potential contribution of adenosine receptor
APA, Harvard, Vancouver, ISO, and other styles
We offer discounts on all premium plans for authors whose works are included in thematic literature selections. Contact us to get a unique promo code!