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Dissertations / Theses on the topic 'Flow over rough surfaces'

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Published: 4 June 2021
Last updated: 1 February 2022

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1

Andersson, Robin. "Flow Over Large-Scale Naturally Rough Surfaces." Licentiate thesis, Luleå tekniska universitet, Institutionen för teknikvetenskap och matematik, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-136.

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The fluid mechanical field of rough surface flows has been developed ever since the first experiments by Haagen (1854) and Darcy (1857). Although old, the area still holds merit and a surprising amount of information have to this day yet to be fully understood, which surely is a proof of its complexity. Many equations and CFD tools still rely on old, albeit reliable, concepts for simplifying the flow to be able to handle the effects of surface roughness. This notion is, however, likely to change within a not so unforeseeable future. The advancement of computer power has opened the door for mor
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2

Watt, Robert McFarlane. "Effects of surface roughness on the boundary-layer characteristics of turbine aerofoils." Thesis, University of Oxford, 1988. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.330065.

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3

McClain, Stephen Taylor. "A discrete-element model for turbulent flow over randomly-rough surfaces." Diss., Mississippi State : Mississippi State University, 2002. http://library.msstate.edu/etd/show.asp?etd=etd-04032002-140007.

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4

Thakkar, Manan. "Investigation of turbulent flow over irregular rough surfaces using direct numerical simulations." Thesis, University of Southampton, 2017. https://eprints.soton.ac.uk/415836/.

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Incompressible turbulent flow in irregular rough channels is investigated using a finite-difference direct numerical simulation code which includes an iterative embedded boundary treatment to resolve the roughness. Seventeen industrially relevant rough surfaces with a wide variation in surface topography are considered. Various studies are conducted to understand the flow physics and the relationship between key flow parameters and surface topography. Studies at low values of friction Reynolds number, Reτ, for a single surface, show that the flow is laminar up to Reτ = 89 and begins to develop
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5

LIU, WEN. "TRANSPORT PHENOMENA ASSOCIATED WITH LIQUID METAL FLOW OVER TOPOGRAPHICALLY MODIFIED SURFACES." UKnowledge, 2012. http://uknowledge.uky.edu/me_etds/16.

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Brazing and soldering, as advanced manufacturing processes, are of significant importance to industrial applications. It is widely accepted that joining by brazing or soldering is possible if a liquid metal wets the solids to be joined. Wetting, hence spreading and capillary action of liquid metal (often called filler) is of significant importance. Good wetting is required to distribute liquid metal over/between the substrate materials for a successful bonding. Topographically altered surfaces have been used to exploit novel wetting phenomena and associated capillary actions, such as imbibitio
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6

Grissom, Dustin Leonard. "A Study of Sound Generated by a Turbulent Wall Jet Flow Over Rough Surfaces." Diss., Virginia Tech, 2007. http://hdl.handle.net/10919/28336.

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The far field acoustics generated by turbulent flow over rough surfaces has been experimentally investigated in an acoustically treated wall jet facility. The facility allows direct measurement of the far field sound from small patches of surface roughness, without contamination from edge or other aerodynamic noise sources. The facility is capable of generating turbulent boundary layer flows with momentum thickness Reynolds numbers between 450 and 1160. The variation of surface conditions tested cover the range from hydrodynamically smooth surfaces through most of the transitional range, wi
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7

Letherman, Sophie Bella. "Turbulence modelling of oscillatory flows over smooth and rough surfaces." Thesis, University of Manchester, 2000. https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.488128.

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This study investigates turbulence models for application to boundary layer flows. Firstly, steady channel flow and transient pipe flows are considered. Calculations of a low-Reynolds-number k-epsilon model, a k-epsilon-S model (a strain parameter model which has not been applied to unsteady flows previously) and a Reynolds Stress Transport model are compared with experimental and DNS data. The eddy viscosity turbulence models (k-epsilon, k-epsilon-S) satisfactorily predict the mean flow parameters of steady channel flow. However the k-epsilon-S model proves superior in comparison with turbule
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8

Smith, Benjamin Scott. "Wall Jet Boundary Layer Flows Over Smooth and Rough Surfaces." Diss., Virginia Tech, 2008. http://hdl.handle.net/10919/27597.

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The aerodynamic flow and fluctuating surface pressure of a plane, turbulent, two-dimensional wall jet flow into still air over smooth and rough surfaces has been investigated in a recently constructed wall jet wind tunnel testing facility. The facility has been shown to produce a wall jet flow with Reynolds numbers based on the momentum thickness, Re<SUB>&delta</SUB> = &deltaU<SUB>m</SUB>/&nu, of between 395 and 1100 and nozzle exit Reynolds numbers, Re<SUB>j</SUB> = U<SUB>m</SUB>b/&nu, of between 16000 and 45000. The wall jet flow properties (&delta, &delta<SUP>*</SUP>, &theta, y<SUB>1</SUB
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9

Alhinai, Almajd. "An investigation of classifying the flow over rough surfaces into k- and d- type in turbulent channel flow." Thesis, University of Sheffield, 2015. http://etheses.whiterose.ac.uk/11255/.

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This thesis is concerned with the classification of roughness into k- and d- type in turbulent channel flow. Despite the practical importance of this type of flow, the literature review suggest that advancements in the field have been slow due to the difficulty of making accurate measurements close to the wall when using experimental methods. In recent years, numerical modelling has provided a good alternative to studying this type of flow. In this work, an Implicit Large Eddy Simulation (ILES) approach was developed to carry out numerical simulations for turbulent channel flow over rough surf
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10

Seddighi-Moormani, Mehdi. "Study of turbulence and wall shear stress in unsteady flow over smooth and rough wall surfaces." Thesis, University of Aberdeen, 2011. http://digitool.abdn.ac.uk:80/webclient/DeliveryManager?pid=166096.

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Flows over hydraulically smooth walls are predominant in turbulence studies whereas real surfaces in engineering applications are often rough. This is important because turbulent flows close to the two types of surface can exhibit large differences. Unfortunately, neither experimental studies nor theoretical studies based on conventional computational fluid dynamics (CFD) can give sufficiently accurate, detailed information about unsteady turbulent flow behaviour close to solid surfaces, even for smooth wall cases. In this thesis, therefore, use is made of a state of the art computational meth
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11

Conrad, Jeffrey G. "Propagation of vertically polarized waves over rough ocean surfaces." Thesis, Monterey, California. Naval Postgraduate School, 1997. http://hdl.handle.net/10945/8867.

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Approved for public release; distribution is unlimited<br>The problem of propagation of vertically polarized radiowaves in an inhomogeneous atmosphere and over rough ocean surfaces is solved using the parabolic equation method. The solution of the parabolic equation is accomplished through the use of the Fourier split-step algorithm. Formulation of the equations is based upon (1) recognizing that the Fourier kernels of the transform equations in the split step algorithm represent planes waves and (2) compensating for the effects of rough ocean surfaces by using a rough surface reduction factor
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12

Pruin, Bernard. "Wave propagation over one- and two-dimensional rough surfaces." Thesis, University of Cambridge, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.624138.

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13

Awadallah, Ra'id S. M. S. "Rough Surface Scattering and Propagation over Rough Terrain in Ducting Environments." Diss., Virginia Tech, 1998. http://hdl.handle.net/10919/30549.

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The problem of rough surface scattering and propagation over rough terrain in ducting environments has been receiving considerable attention in the literature. One popular method of modeling this problem is the parabolic wave equation (PWE) method. In this method, the Helmholtz wave equation is replaced by a PWE under the assumption of predominant forward propagation and scattering. The resulting PWE subjected to the appropriate boundary condition(s) is then solved, given an initial field distribution, using marching techniques such as the split-step Fourier algorithm. As is obviou
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14

Harris, Joseph H. "Stability of the flow over a rough, rotating disk." Thesis, University of Warwick, 2013. http://wrap.warwick.ac.uk/60307/.

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This thesis is concerned with discovering the effect of a distributed roughness on the boundary-layer stability of a rotating disk. The investigation uses both a local, linear stability analysis and machined aluminium disks rotating in water in conjunction with a hot-film anemometer system. The stability analysis applies a sinusoidal function to the surface of the disk which mimics anisotropic roughness similar to a grooved record. The new surface is used with the governing equations in order to calculate the new mean flow profiles for the now grooved surface at a variety of roughnesses. These
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15

Campbell, Lorna J. "Double-averaged open-channel flow over regular rough beds." Thesis, University of Aberdeen, 2005. http://digitool.abdn.ac.uk/R?func=search-advanced-go&find_code1=WSN&request1=AAIU214372.

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The majority of analysis of hydraulically rough open-channel flows has been founded on the temporally-averaged momentum equations (RANS). However, the structure of shallow open-channel flows over hydraulically rough beds, together with the near-bed region of deeper open-channel flows with rough beds awaits clarification. The purpose of this project was to conduct an extensive programme of laboratory-based experiments to gauge the applicability of the double-averaged momentum equations for shallow open-channel flows over simple rough beds (transverse square bars with varying centre-to-centre pi
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16

Showkat, Ali Syamir Alihan. "Flow over and past porous surfaces." Thesis, University of Bristol, 2018. http://hdl.handle.net/1983/86527ebe-9574-425b-a1c4-6152f07cf4b4.

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This thesis is concerned with the application of porous treatments as a means of flow and aerodynamic noise reduction. An extensive experimental investigation is undertaken to study the effects of flow interaction with porous media, in particular in the context of the manipulation of flow over a flat plate and past the blunt trailing edges. Comprehensive boundary layer and wake measurements have been carried out for a long flat plate with solid and porous blunt trailing edges. Unsteady velocity and surface pressure measurements have also been performed to gain an in-depth understanding of the
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17

Harp, Susan R. "A computational method for evaluating cavitating flow between rough surfaces." Diss., Georgia Institute of Technology, 2000. http://hdl.handle.net/1853/16838.

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18

Merrill, Craig F. "Spray generation for liquid wall jets over smooth and rough surfaces." Thesis, Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 1998. http://handle.dtic.mil/100.2/ADA354473.

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Dissertation (Ph.D. in Mechanical Engineering) Naval Postgraduate School, September 1998.<br>"September 1998." Dissertation supervisor(s): T. Sarpkaya. Includes bibliographical references (p. 171-176). Also available online.
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19

Nilsson, Månz. "Radio-wave propagation modelling over rough sea surfaces and inhomogeneous atmosphere." Thesis, Karlstads universitet, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:kau:diva-84595.

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20

Walshe, John D. "CFD modelling of wind flow over complex and rough terrain." Thesis, Loughborough University, 2003. https://dspace.lboro.ac.uk/2134/7827.

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A model has been developed using the general-purpose Navier-Stokes solver CFX4 to simulate Atmospheric Boundary Layer flow over complex terrain. This model has been validated against the measured data from the Askervein Hill experiment, and has been shown to perform well. The CFD model is also compared to the WAsP linear model of wind flow over topography, and a significant improvement is noted for flow over complex topography. Boundary conditions, gridding issues and sensitivity to other solver parameters have all been investigated. An advanced roughness model has been developed to simulate f
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21

Yeo, K. S. "The stability of flow over flexible surfaces." Thesis, University of Cambridge, 1986. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.384471.

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22

Belcher, Stephen E. "Turbulent boundary layer flow over undulating surfaces." Thesis, University of Cambridge, 1990. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.279606.

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23

Huang, Jui-Che. "Boundary layer receptivity of flow over compliant surfaces." Thesis, University of Liverpool, 2006. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.428289.

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24

Husain, C. N. "The effect of ridged roughness on momentum transfer." Thesis, University of Newcastle Upon Tyne, 1988. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.380768.

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25

梁耀彰 and Yiu-cheong Leung. "Investigation of flows over grooved surfaces." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 1987. http://hub.hku.hk/bib/B30425323.

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26

Leung, Yiu-cheong. "Investigation of flows over grooved surfaces /." [Hong Kong : University of Hong Kong], 1987. http://sunzi.lib.hku.hk/hkuto/record.jsp?B12361422.

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27

Andersson, Anders G. "Modelling flow with free and rough surfaces in the vicinity of hydropower plants." Doctoral thesis, Luleå tekniska universitet, Strömningslära och experimentell mekanik, 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-25687.

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Flow with free and rough surfaces near hydropower stations is of interest for both engineering and environmental applications. Here, Computational Fluid Dynamics simulations of free surface flow and flow over rough surfaces in regulated rivers were performed in applications such fish migration, spillway design and flow over rough surfaces as in hydropower tunnels or natural channels. For all the investigated applications it is typical with very large geometrical scales, high flow rates and highly turbulent flow. Modelling boundaries such as free water surfaces and rough walls presents a challe
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28

Kuhn, Simon. "Transport mechanisms in mixed convective flow over complex surfaces." Zürich : ETH, 2008. http://e-collection.ethbib.ethz.ch/show?type=diss&nr=17627.

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29

Eberly, Lauren Elizabeth. "Internal Wave Generation Over Rough, Sloped Topography: An Experimental Study." BYU ScholarsArchive, 2012. https://scholarsarchive.byu.edu/etd/3437.

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Internal waves exist everywhere in stratified fluids - fluids whose density changes with depth. The two largest bodies of stratified fluid are the atmosphere and ocean. Internal waves are generated from a variety of mechanisms. One common mechanism is wind forcing over repeated sinusoidal topography, like a series of hills. When modeling these waves, linear theory has been employed due to its ease and low computational cost. However, recent research has shown that non-linear effects, such as boundary layer separation, may have a dramatic impact on wave generation. This research has consisted o
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30

Kazemi, Ehsan. "Numerical modelling of turbulent free surface flows over rough and porous beds using the smoothed particle hydrodynamics method." Thesis, University of Sheffield, 2017. http://etheses.whiterose.ac.uk/19579/.

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Understanding turbulent flow structure in open channel flows is an important issue for Civil Engineers who study the transport of water, sediments and contaminants in rivers. In the present study, turbulent flows over rough impermeable and porous beds are studied numerically using the Smoothed Particle Hydrodynamics (SPH) method. A comprehensive review is carried out on the methods of turbulence modelling and treatment of bed boundary in open channel flows in order to identify the limitations of the existing particle models developed in this area. 2D macroscopic SPH models are developed for si
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31

Sapkota, Deependra. "TRIPPING OF THE BOUNDARY LAYER DEVELOPMENT LENGTH OVER ROUGH AND FULLY TURBULENT SUBCRITICAL FLUME." OpenSIUC, 2015. https://opensiuc.lib.siu.edu/theses/1801.

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The distance required for flow entering a laboratory channel to become fully-developed and uniform can be substantial. Given the need to establish fully-developed uniform flow, if the length of a laboratory channel is not substantial then it likely that the flume cannot be used to conduct open-channel flow research. In laboratory studies where the channel bed is hydraulically rough, the noted problem can be lessened by minimizing the length over which the flow becomes fully-developed and uniform (Lunif). For this study it is hypothesized that if bed material with a roughness height (ks, ∆) is
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32

Lucey, Anthony Denis. "Hydroelastic instability of flexible surfaces." Thesis, University of Exeter, 1989. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.235966.

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33

Langley, A. J. "Vortical flows on wavy surfaces." Thesis, University of Cambridge, 1985. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.377190.

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34

Jelly, Thomas. "A critical assessment of turbulent flow over textured superhydrophobic surfaces." Thesis, Imperial College London, 2013. http://hdl.handle.net/10044/1/24113.

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Over the past century, a sustained effort has been expended on the research and development of surfaces that reduce the amount of drag experienced by a fluid as it passes by, motivated by both environmental and economic savings. Superhydrophobic surfaces have recently emerged as an attractive means to reduce the levels of skin-friction drag under both laminar and turbulent flow conditions. A superhydrophobic state is attained naturally or synthetically through a combination of surface topology and surface chemistry and can, in some cases, support a free-stress gas-liquid interface. In the pres
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35

Chen, Zhuo. "Scalar dispersion in turbulent open channel flows over smooth and rough beds." Thesis, Georgia Institute of Technology, 2012. http://hdl.handle.net/1853/44896.

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Study of passive dispersion of a neutral scalar in turbulentflows is highly important due to its numerous applications in the areas of turbulent flow visualization, turbulent heat transfer and transport of pollutants and other substances in the environment. Over the past few decades, many analytical, numerical, and experimental studies have been conducted on this topic to obtain a better understanding of the physical process. In the present work, Large Eddy Simulations (LES) of scalar dispersion in turbulent flow over smooth and rough channels is conducted to contribute to the further understa
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36

Mansour-Tehrani, Mehrdad. "Spacial distribution and scaling of bursting events in boundary layer turbulence over smooth and rough surfaces." Thesis, University College London (University of London), 1992. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.261297.

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37

Joseph, Liselle AnnMarie. "Pressure Fluctuations in a High-Reynolds-Number Turbulent Boundary Layer over Rough Surfaces of Different Configurations." Diss., Virginia Tech, 2017. http://hdl.handle.net/10919/79630.

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The pressure fluctuations under a high Reynolds Number, rough-wall, turbulent, boundary layer have been studied in the Virginia Tech Stability Wind Tunnel. Rough surfaces of varying element height (1-mm, 3-mm), shape (hemispheres, cylinders) and spacing (5.5-mm, 10.4-mm, 16.5-mm) were investigated in order to ascertain how the turbulent pressure fluctuations change with changes in roughness geometry. Rough surfaces which contain two types of elements are investigated and relationships between the combination surface and the individual surfaces have been uncovered. Measurements of the wall pres
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38

Repasky, Russell James. "Turbulent Boundary Layers over Rough Surfaces: Large Structure Velocity Scaling and Driver Implications for Acoustic Metamaterials." Thesis, Virginia Tech, 2019. http://hdl.handle.net/10919/90796.

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Turbulent boundary layer and metamaterial properties were explored to initiate the viability of controlling acoustic waves driven by pressure fluctuations from flow. A turbulent boundary layer scaling analysis was performed on zero-pressure-gradient turbulent boundary layers over rough surfaces, for 30,000≤〖Re〗_θ≤100,000. Relationships between fluctuating pressures and velocities were explored through the pressure Poisson equation. Certain scaling laws were implemented in attempts to collapse velocity spectra and turbulence profiles. Such analyses were performed to justify a proper scaling of
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39

Keays, Steven J. "Turbulent fluid flow and heat transfer in annular passages with rough surfaces and moving cores." Thesis, University of Ottawa (Canada), 1993. http://hdl.handle.net/10393/6827.

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This study investigates the behaviour of fully developed fluid flows in concentric annuli with rough surfaces and moving cores, by analytically predicting the effects of surface roughness, core velocity and turbulent motion on the momentum and heat transfer characteristics of the flow, such as friction forces, velocity profiles, temperature profiles and heat transfer. The analytical predictions are produced by a mathematical model based on an adaptation of Prandtl's mixing length theories and on the data of previous studies of turbulent flow in annuli and rectangular channels which were artifi
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40

Shetty, Sanat Achanna. "Liquid spreading and thin film flows over complex surfaces /." Access abstract and link to full text, 1995. http://0-wwwlib.umi.com.library.utulsa.edu/dissertations/fullcit/9610610.

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41

Bomminayuni, Sandeep Kumar. "Large eddy simulation of turbulent flow over a rough bed using the immersed boundary method." Thesis, Georgia Institute of Technology, 2010. http://hdl.handle.net/1853/34821.

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Study of turbulent flow over a rough bed is highly important due to its numerous applications in the areas of sediment transport and pollutant discharge in streams, rivers and channels. Over the past few decades, many experimental studies have been conducted in this respect to understand the underlying phenomenon. However, there is a scarcity in the number of computational studies conducted on this topic. Therefore, a Large Eddy Simulation (LES) of turbulent flow over a rough channel bed was conducted to contribute further understanding of the influence of bed roughness on turbulent flow prope
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42

Mensire, Rémy. "Hydrodynamics of oil in contact with an aqueous foam : wetting, imbibition dynamics and flow in rough confined media." Thesis, Paris Est, 2016. http://www.theses.fr/2016PESC1137/document.

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L’extraction de matières premières du sol à des fins énergétiques (récupération assistée d’huile) et environnementales (dépollution des sols) fait l’objet de recherches intensives en lien avec des thématiques telles que la séquestration du carbone ou la fracturation hydraulique. L’objectif est de trouver des méthodes moins destructives, moins gourmandes en matériel et en énergie, mais aussi plus efficaces et moins coûteuses. Nous proposons d’étudier une méthode alternative aux moyens conventionnels avec l’utilisation de mousses aqueuses comme agent extracteur d’huile. Les mousses aqueuses sont
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43

Perkins, Richard Mark. "PIV Measurements of Turbulent Flow in a Rectangular Channel over Superhydrophobic Surfaces with Riblets." BYU ScholarsArchive, 2014. https://scholarsarchive.byu.edu/etd/5547.

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In this thesis I investigate characteristics of turbulent flow in a channel where one of the walls has riblets, superhydrophobic microribs, or a hybrid surface with traditional riblets built on a superhydrophobic microrib surface. PIV measurements are used to find the velocity profile, the turbulent statistics, and shear stress profile in the rectangular channel with one wall having a structured test surface. Both riblets and superhydrophobic surfaces can each provide a reduction in the wall shear stress in a turbulent channel flow. Characterizing the features of the flow using particle image
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Amin, Abolfazl. "Three-Dimensional Numerical Simulations of Liquid Laminar Flow Over Superhydrophobic Surfaces with Post Geometries." BYU ScholarsArchive, 2011. https://scholarsarchive.byu.edu/etd/2634.

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Frictional resistance reduction of liquid flow over surfaces has recently become a more important topic of research in the field of fluid dynamics. Scientific and technological progress and continued interest in nano and micro-technology have required new developments and approaches related to reducing frictional resistance, especially in liquid flow through nano and micro-channels. The application of superhydrophobic surfaces could be very effective in achieving the desired flow through such small channels. Superhydrophobic surfaces are created by intentionally creating roughnesses on the sur
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45

Gallagher, Michael William. "Coherent flow structures over mixed grain sized surfaces and their role in sediment transport." Thesis, University of Aberdeen, 1998. http://digitool.abdn.ac.uk/R?func=search-advanced-go&find_code1=WSN&request1=AAIU105984.

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The prediction of grain entrainment rates in river flows is of great importance to an engineer, as the movement of sediment can cause permanent changes to the form and character of a river. One of the key elements in achieving accurate prediction of grain entrainment rates is the understanding of the near bed flow regime, as research has revealed the existence of a number of organised flow structures which are thought to control the magnitude of shear stress applied to the bed surface. However, most of the knowledge gained on these turbulent flow structures has been from experiments conducted
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46

Butt, Mohammad Usman [Verfasser], and Christoph [Gutachter] Egbers. "Experimental investigation of the flow over macroscopic hexagonal structured surfaces / Mohammad Usman Butt ; Gutachter: Christoph Egbers." Cottbus : BTU Cottbus - Senftenberg, 2014. http://d-nb.info/1114282901/34.

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Butt, Usman [Verfasser], and Christoph [Gutachter] Egbers. "Experimental investigation of the flow over macroscopic hexagonal structured surfaces / Mohammad Usman Butt ; Gutachter: Christoph Egbers." Cottbus : BTU Cottbus - Senftenberg, 2014. http://nbn-resolving.de/urn:nbn:de:kobv:co1-opus4-30555.

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48

Senior, A. K. "A Numerical study of resistance in a rough walled channel flow where the ratio of roughness length scale to the depth of flow varies over a wide range." Thesis, School of Engineering and Applied Science, 2009. http://hdl.handle.net/1826/3892.

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Numerical calculations were performed over a variety of two-dimensional rib roughness configurations in which the ratio of flow depth to roughness height was varied from 1.1 to 40. Periodically fully developed flow was achieved by employing periodic boundary conditions and the effect of turbulence was accounted for by a two-layer model. These calculations were used to test the hypothesis that any rough wall resistance may be reduced to an equivalent wall shear stress located on a plane wall. The position of the plane wall is determined by a novel method of prediction obtained by consideration
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49

Krumbein, Benjamin [Verfasser], Cameron [Akademischer Betreuer] Tropea, Suad [Akademischer Betreuer] Jakirlić, and Amsini [Akademischer Betreuer] Sadiki. "A modeling framework for scale-resolving computations of turbulent flow over porous and rough walls / Benjamin Krumbein ; Cameron Tropea, Suad Jakirlić, Amsini Sadiki." Darmstadt : Universitäts- und Landesbibliothek Darmstadt, 2019. http://d-nb.info/1190818906/34.

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50

Klute, Sandra M. "The Development and Control of Axial Vortices over Swept Wings." Diss., Virginia Tech, 1999. http://hdl.handle.net/10919/29718.

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The natural unsteadiness in the post-breakdown flowfield of a 75° sweep delta wing at 40° angle of attack was studied with dual and single point hot-wire anemometry in the Engineering Science and Mechanics (ESM) Wind Tunnel at a Reynolds number Re = 210,000. Data were taken in five crossflow planes surrounding the wing's trailing edge. Results showed a dominant narrowband Strouhal frequency of St = 1.5 covering approximately 80% of the area with lower-intensity broadband secondary frequencies over 15% of that region. Cross-correlations between a fixed and traversing wire were calculated
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