Relevant bibliographies by topics / Kinetic energy budget

Contents

  1. Journal articles
  2. Dissertations / Theses
  3. Book chapters
  4. Conference papers

Academic literature on the topic 'Kinetic energy budget'

Author: Grafiati
Published: 4 June 2021
Last updated: 1 February 2022

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

Select a source type:

Consult the lists of relevant articles, books, theses, conference reports, and other scholarly sources on the topic 'Kinetic energy budget.'

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.

Journal articles on the topic "Kinetic energy budget"

1

Abdel-Basset Mohamed, Heshmat, Mahmoud Ahmed Husin, and Hosny Mohamed Hasanen. "Kinetic Energy Budget of a Tropical Cyclone." Atmospheric and Climate Sciences 05, no. 04 (2015): 394–407. http://dx.doi.org/10.4236/acs.2015.54031.

Full text
APA, Harvard, Vancouver, ISO, and other styles
2

Folorunso, OP. "Turbulent Kinetic Energy and Budget of Heterogeneous Open Channel with Gravel and Vegetated Beds." Journal of Civil Engineering Research & Technology 3, no. 2 (June 30, 2021): 1–4. http://dx.doi.org/10.47363/jcert/2021(3)115.

Full text
Abstract:
Turbulent kinetic energy (TKE) and budget are indispensable hydraulic parameters to determine turbulent scales and processes resulting from various and different natural hydraulic features in open channels. This paper focuses on experimental investigation of turbulent kinetic energy and budget in a heterogeneous open channel flow with gravel and vegetated beds. Results indicate the turbulent kinetic energy (TKE) value over gravel region of the heterogeneous bed remains approximately constant with flow depth. The highest turbulent kinetic energy was calculated for flexible vegetation arrangement compared to the rigid vegetation. The estimation of the turbulent kinetic energy budget shows the higher values of turbulence production recorded over the flexible vegetated bed, consequently, the dissipation rate exhibits faster decay of turbulence kinetic energy over the vegetated bed in comparison to the gravel bed.
APA, Harvard, Vancouver, ISO, and other styles
3

Fan, Yalin, and Paul Hwang. "Kinetic energy flux budget across air-sea interface." Ocean Modelling 120 (December 2017): 27–40. http://dx.doi.org/10.1016/j.ocemod.2017.10.010.

Full text
APA, Harvard, Vancouver, ISO, and other styles
4

Rao, P. L. S. "The kinetic energy budget of Asian summer monsoon." Theoretical and Applied Climatology 84, no. 4 (September 28, 2005): 191–205. http://dx.doi.org/10.1007/s00704-005-0173-9.

Full text
APA, Harvard, Vancouver, ISO, and other styles
5

Krishnamoorthy, L. V., and R. A. Antonia. "Turbulent kinetic energy budget in the near-wall region." AIAA Journal 26, no. 3 (March 1988): 300–302. http://dx.doi.org/10.2514/3.9888.

Full text
APA, Harvard, Vancouver, ISO, and other styles
6

Lai, Chris C. K., and Scott A. Socolofsky. "The turbulent kinetic energy budget in a bubble plume." Journal of Fluid Mechanics 865 (March 1, 2019): 993–1041. http://dx.doi.org/10.1017/jfm.2019.66.

Full text
Abstract:
We present the turbulent kinetic energy (t.k.e.) budget of a dilute bubble plume in its asymptotic state. The budget is derived from an experimental dataset of bubble plumes formed inside an unstratified water tank. The experiments cover both the adjustment phase and asymptotic state of the plume. The diameters $d$ of air bubbles are in the range 1–4 mm and the air void fraction $\unicode[STIX]{x1D6FC}_{g}$ is between 0.7 % and 1.8 %. We measured the three components of the instantaneous liquid velocity vector with a profiling acoustic Doppler velocimeter. From the experiments, we found the following inside the heterogeneous bubble core of the plume: (i) the probability density functions of the standardized liquid fluctuations are very similar to those of homogeneous bubble swarms rising with and without background liquid turbulence; (ii) the characteristic temporal frequency $f_{cwi}$ at which bubbles inject t.k.e. into the liquid agrees with the prediction $f_{cwi}=0.14u_{s}/d$ observed and theoretically derived for homogeneous bubble swarms ($u_{s}$ is the bubble slip velocity); (iii) the liquid turbulence is anisotropic with the ratio of turbulence intensities between the vertical and horizontal components in the range 1.9–2.1; (iv) the t.k.e. production by air bubbles is much larger than that by liquid mean shear; and (v) an increasing fraction of the available work done by bubbles is deposited into liquid turbulence as one moves away from the plume centreline. Together with the existing knowledge of homogeneous bubble swarms, our results of the heterogeneous bubble plume support the view that millimetre-sized bubbles create specific patterns of liquid fluctuations that are insensitive to flow conditions and can therefore be possibly modelled by a universal form.
APA, Harvard, Vancouver, ISO, and other styles
7

Grant, A. L. M., and A. P. Lock. "The turbulent kinetic energy budget for shallow cumulus convection." Quarterly Journal of the Royal Meteorological Society 130, no. 597 (January 31, 2004): 401–22. http://dx.doi.org/10.1256/qj.03.50.

Full text
APA, Harvard, Vancouver, ISO, and other styles
8

Zhan, Peng, Aneesh C. Subramanian, Fengchao Yao, Aditya R. Kartadikaria, Daquan Guo, and Ibrahim Hoteit. "The eddy kinetic energy budget in the Red Sea." Journal of Geophysical Research: Oceans 121, no. 7 (July 2016): 4732–47. http://dx.doi.org/10.1002/2015jc011589.

Full text
APA, Harvard, Vancouver, ISO, and other styles
9

Zhou, Lei, Adam H. Sobel, and Raghu Murtugudde. "Kinetic Energy Budget for the Madden–Julian Oscillation in a Multiscale Framework." Journal of Climate 25, no. 15 (August 1, 2012): 5386–403. http://dx.doi.org/10.1175/jcli-d-11-00339.1.

Full text
Abstract:
Abstract A kinetic energy budget for the Madden–Julian oscillation (MJO) is established in a three-scale framework. The three scales are the zonal mean, the MJO scale with wavenumbers 1–4, and the small scale with wavenumbers larger than 4. In the composite budget, the dominant balance at the MJO scale is between conversion from potential energy and work done by the pressure gradient force (PGF). This balance is consistent with the view that the MJO wind perturbations can be viewed as a quasi-linear response to a slowly varying heat source. A large residual in the upper troposphere suggests that much kinetic energy dissipates there by cumulus friction. Kinetic energy exchange between different scales is not a large component of the composite budget. There is a transfer of kinetic energy from the MJO scale to the small scale; that is, this multiscale interaction appears to damp rather than strengthen the MJO. There is some variation in the relative importance of different terms from one event to the next. In particular, conversion from mean kinetic energy can be important in some events. In a few other events, the influence from the extratropics is pronounced.
APA, Harvard, Vancouver, ISO, and other styles
10

Goodman, Louis, Edward R. Levine, and Rolf G. Lueck. "On Measuring the Terms of the Turbulent Kinetic Energy Budget from an AUV." Journal of Atmospheric and Oceanic Technology 23, no. 7 (July 1, 2006): 977–90. http://dx.doi.org/10.1175/jtech1889.1.

Full text
Abstract:
Abstract The terms of the steady-state, homogeneous turbulent kinetic energy budgets are obtained from measurements of turbulence and fine structure from the small autonomous underwater vehicle (AUV) Remote Environmental Measuring Units (REMUS). The transverse component of Reynolds stress and the vertical flux of heat are obtained from the correlation of vertical and transverse horizontal velocity, and the correlation of vertical velocity and temperature fluctuations, respectively. The data were obtained using a turbulence package, with two shear probes, a fast-response thermistor, and three accelerometers. To obtain the vector horizontal Reynolds stress, a generalized eddy viscosity formulation is invoked. This allows the downstream component of the Reynolds stress to be related to the transverse component by the direction of the finescale vector vertical shear. The Reynolds stress and the vector vertical shear then allow an estimate of the rate of production of turbulent kinetic energy (TKE). Heat flux is obtained by correlating the vertical velocity with temperature fluctuations obtained from the FP-07 thermistor. The buoyancy flux term is estimated from the vertical flux of heat with the assumption of a constant temperature–salinity (T–S) relationship. Turbulent dissipation is obtained directly from the usage of shear probes. A multivariate correction procedure is developed to remove vehicle motion and vibration contamination from the estimates of the TKE terms. A technique is also developed to estimate the statistical uncertainty of using this estimation technique for the TKE budget terms. Within the statistical uncertainty of the estimates herein, the TKE budget on average closes for measurements taken in the weakly stratified waters at the entrance to Long Island Sound. In the strongly stratified waters of Narragansett Bay, the TKE budget closes when the buoyancy Reynolds number exceeds 20, an indicator and threshold for the initiation of turbulence in stratified conditions. A discussion is made regarding the role of the turbulent kinetic energy length scale relative to the length of the AUV in obtaining these estimates, and in the TKE budget closure.
APA, Harvard, Vancouver, ISO, and other styles
More sources

Dissertations / Theses on the topic "Kinetic energy budget"

1

Alberti, Luca. "Statistical Breakdown of Numerically Simulated Shear-Free Flows." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2020.

Find full text
Abstract:
A statistical analysis of several DNSs of incompressible turbulent shear-free flows (with Reλ ranging from ≈ 86 to ≈ 245) was performed, aimed to study the small scale processes that promote turbulent entrainment at the TNTI. After a certain transient, the shearless flows reached a statistically steady state. From that time instant, the main features of the various flow configurations were statistically investigated by assessing the classical and conditional mean profiles of total kinetic energy (K) and anisotropy ratio (urms/ξ), the classical and conditional mean profiles of the terms of the total kinetic energy budget (advection C, pressure strain Π, viscous diffusion Dv, dissipation ε and power injection Pi), the classical PDFs of the velocity components (u, v and w), the classical and conditional mean profiles of the invariants of the velocity gradient (R and Q), rate-of-strain (RS and QS) and rate-of-rotation (QW) tensors and the classical and conditional J PDFs of the same invariants. Conditional statistical quantities were computed in relation to the distance from the TNTI. To avoid the accidental mixing of turbulent and non-turbulent points in the conditional statistics, all the nodes belonging to irrotational bubbles and turbulent islands were neglected. All the conditional mean profiles are characterized by very sharp gradients at the TNTI, meanwhile in the classical mean profiles the variations are distributed on a much wider portion of the domain, indicating how the conditional averages are able to successfully discern turbulent and irrotational regions, avoiding the smoothening of the mean profiles via large scale intermittency. The similarity between the conditional statistics obtained here for shearless flows, and those extracted from temporal jets in previous works, is very interesting, since it suggests some sort of universality in the TNTI dynamics, as well asin the turbulent entrainment processes.
APA, Harvard, Vancouver, ISO, and other styles
2

Tian, Geng. "Analysis of the unsteady boundary-layer flow over urban-like canopy using large eddy simulation." Thesis, Ecole centrale de Nantes, 2018. http://www.theses.fr/2018ECDN0062/document.

Full text
Abstract:
L’urbanisation croissante fait émerger des enjeux sociétaux et environnementaux relatifs à la pollution atmosphérique et au microclimat urbain. La compréhension des phénomènes physiques de transport de quantité de mouvement, de chaleur et de masse entre la canopée urbaine et la couche limite atmosphérique est primordiale pour évaluer et anticiper les impacts négatifs de l’urbanisation. Les processus turbulents spécifiques à la couche limite urbaine sont étudiés par une approche de simulation des grandes échelles, dans une configuration urbaine représentée par un arrangement de cubes en quinconce. Le modèle de sous-maille de type Smagorinsky dynamique est implémenté pour mieux prendre en compte l’hétérogénéité de l’écoulement et les retours d’énergie des petites vers les grandes structures. Le nombre de Reynolds basé sur la hauteur du domaine et la vitesse de l’écoulement libre est de 50000. L’écoulement est résolu dans les sous-couches visqueuses et le maillage est raffiné dans la canopée. Le domaine est composé de 28 millions de cellules. Les résultats sont comparés à la littérature et aux données récentes obtenues dans la soufflerie du LHEEA. Chaque contribution au bilan d’énergie cinétique turbulente est calculée directement en tout point. Cette information, rare dans la littérature, permet d’étudier les processus dans la sous couche rugueuse. Grâce à ces résultats 3D, l’organisation complexe de l’écoulement moyen (recirculations, vorticité, points singuliers) est analysée en relation avec la production de turbulence. Enfin, une simulation où les obstacles sont remplacés par une force de traînée équivalente est réalisée à des fins d’évaluation de cette approche
The rapid development of urbanization raises social and environmental challenges related to air pollution and urban climate. Understanding the physical processes of momentum, heat, and mass exchanges between the urban canopy and the atmospheric boundary-layer is a key to assess,predict and prevent negative impacts of urbanization. The turbulent processes occurring in the urban boundary-layer are investigated using computational fluid dynamics (CFD). The unsteady flow over an urban-like canopy modelled by a staggered arrangement of cubes is simulated using large eddy simulation (LES). Considering the highspatial and temporal in homogeneity of the flow, a dynamic Smagorinsky subgrid-scale model is implemented in the code to allow energyback scatter from small to large scales. The Reynolds number based on the domain height and free-stream velocity is 50000. The near-wall viscous sub-layers are resolved and the grid is refined in the canopy resulting in about 28 million grid cells. LES results are assessed by comparison with literature and data recently acquired in the wind tunnel of the LHEEA. The turbulent kinetic energy budget in which all contributions are independently computed is investigated. These rarely available data are used to analyse the turbulent processes in the urban canopy. By taking advantage of the three-dimensionality of the simulated flow, the complex 3D time-averaged organization of the flow (recirculation, vorticesor singular points) is analyzed in relation with production of turbulence. Finally a drag approach where obstacles are replaced by an equivalent drag force is implemented in the same domain and results are compared to obstacle-resolved data
APA, Harvard, Vancouver, ISO, and other styles
3

Gao, Feng. "Advanced numerical simulation of corner separation in a linear compressor cascade." Thesis, Ecully, Ecole centrale de Lyon, 2014. http://www.theses.fr/2014ECDL0008/document.

Full text
Abstract:
La demande croissante pour alléger les moteurs d’avions et diminuer les émissions polluantes de la propulsion aéronautique réclame à rendre plus compact le système de compression des moteurs, qui représente environ 40%-50% de la masse totale. Or, à taux de compression global égal, la réduction du nombre d’étage exige d’un point de vue aérodynamique une augmentation de la charge des aubes de compresseur par étage. La charge d’aube est aujourd’hui limitée car elle induit différents mécanismes de pertes tridimensionnelles très pénalisant. L’un des plus importants est le décollement de coin qui se forme à la jonction entre l’extrados de l’aube et le moyeu ou le carter. Bien que des travaux existent sur les mécanismes et paramètres intervenant dans le décollement de coin, il est encore difficile de proposer une méthode de contrôle efficace. Cela est principalement dû à deux raisons : (i) le manque de compréhension fine des mécanismes physiques, (ii) l’utilisation pour la conception de modèles de turbulence classiques de type RANS (Reynolds-averaged Navier-Stokes) qui ne sont pas capables de prédire précisément le décollement de coin, car ils ne peuvent pas décrire correctement les mécanismes de transport turbulent. Des simulations de type RANS et LES (large-eddy simulation = simulation des grandes échelles) sont présentées dans cette thèse sur une configuration de grille d’aubes de compresseur, et comparées avec les données expérimentales obtenues au LMFA (issues de travaux séparés). L’approche RANS surestime globalement le décollement de coin. Une amélioration significative est obtenue par la méthode LES, en particulier pour le coefficient de pression statique sur l’aube et les pertes de pression totale. Ces résultats montrent que la zone de décollement de coin, qui est la source principale des pertes, génère des tourbillons de grande échelle associés à de forts niveaux d’énergie. Les histogrammes bimodaux de la vitesse tangentielle qui ont été observés expérimentalement semblent confirmés par les résultats LES. En ce qui concerne les amplitudes des fluctuations de vitesse tangentielle, les résultats expérimentaux et ceux de la LES mettent en évidence deux pics sur certains profils perpendiculaires aux parois. Enfin, grâce à l’approche LES, les bilans de l’énergie cinétique turbulente sont calculés et analysés. Ils décrivent l’équilibre entre les termes de production, de dissipation et de transport. Une des perspectives de cette analyse est d’aider à améliorer la modélisation de la turbulence en approche RANS
The increasing demand to reduce the mass of aircraft jet engines and emissions of aircraft propulsion requires to make the compression system of engines more compact, since this component accounts for about 40%-50% of the total mass. However, at a given overall pressure ratio, decreasing the number of stages will raise the compressor blade loading per stage. The blade loading is extremely restricted by different three-dimensional flow loss mechanisms. One of them is the corner separation that forms between the blade suction side and the hub or shroud. Although some works previously investigated the mechanisms and the parameters of corner separation, it is still difficult to propose an effective control method of the corner separation. That is mainly due to two reasons: (i) the lack of knowledge of the physical mechanisms, (ii) the nowadays classical RANS (Reynolds-averaged Navier-Stokes) turbulence models are not capable to accurately predict the corner separation, since they cannot correctly describe the turbulent transport mechanisms. RANS (Reynolds-averaged Navier-Stokes) and LES (large-eddy simulation) simulations are here presented on a compressor cascade configuration, in comparison with experimental data obtained at LMFA (from separate works). The RANS approach globally over-estimates the corner separation, whereas a significant improvement is achieved with the LES, especially for the blade surface static pressure coefficient and the total pressure losses. The corner separation region, which is the main source of the total pressure losses, is shown to generate large-scale energy-containing eddies. The bimodal histograms of the streamwise velocity that were observed experimentally seem to be confirmed by the LES results. Concerning the streamwise velocity fluctuations (RMS), both the experiment and the LES show some profiles with two peaks. Finally, thanks to the LES approach, the turbulent kinetic energy budget, which represents the balance between the production, dissipation and transport terms, are computed and analyzed. This may help the improvement of RANS turbulence modeling
APA, Harvard, Vancouver, ISO, and other styles
4

Augustine, Starrlight. "Metabolic programming of zebrafish, Danio rerio uncovered : Physiological performance as explained by Dynamic Energy Budget Theory and life-cycle consequences of uranium induced perturbations." Thesis, Aix-Marseille, 2012. http://www.theses.fr/2012AIXM4708/document.

Full text
Abstract:
Ce travail de thèse s'est intéressé aux effets de l'uranium appauvri (U) sur le poisson zèbre, Danio rerio. L'hypothèse de travail majeure est que les effets de l'U peuvent se traduire par des modifications du métabolisme. Par conséquent nous avons caractérisé la performance physiologique par le biais de la théorie des bilans d'énergie dynamique (DEB) car c'est la seule théorie qui quantifie simultanément l'ingestion, l'assimilation, la croissance, la reproduction, la maturation, la maintenance et le vieillisse¬ment au cours du cycle de vie entier à des niveaux de nourriture variable. Un modèle DEB a ainsi été construit et a permis de quantifier et de prédire la manière dont la performance physiologique du poisson zèbre dépend de son niveau de nutrition (et de la température). Nous avons montré que le développement s'accélère après la naissance jusqu'à la métamorphose où l'accélération cesse. De plus les coûts de maintenance somatique sont très élevés.Un module spécifiant la toxico-cinétique de l'U, chez un individu qui se nourrit, croit et se reproduit, a été incorporé dans le modèle DEB. Le modèle a été appliqué aux données de toxicité (publiés et acquis pendant la thèse) afin de découvrir quel processus est affecté par l'U. Les résultats montrent qu'à partir de 0 nM, l'U augmenterait les coûts de croissance et diminuerait l'assimilation et/ou augmenterait le coût de la maintenance somatique. Nous n'avons pas pu détecter d'effets notables sur la maturation. Une étude histologique révèle que l'U altère l'intégrité de la paroi intestinale et pourrait perturber l'homéostasie des interactions hôte-bactéries
The aim of this dissertation is to characterize the toxicity of depleted uranium (U) on the metabolism of zebrafish, Danio rerio. The underlying hypothesis of this work is that effects of U show up as effects on the metabolism of the individual. Consequently, we characterized physiological performance using Dynamic Energy Budget (DEB) theory since it is the only theory which simultaneously specifies ingestion, assimilation, growth, reproduction, maturation, maintenance and ageing over the whole life-cycle at varying food availability. Thus a DEB model was built which quantifies and predicts how the physiological performance of zebrafish relates to food level (and temperature). We showed that development accelerates after birth until metamorphosis after which acceleration ceases. Furthermore, somatic maintenance costs are very high.A module specifying toxico-kinetics of U in a feeding, growing and reproducing individual was incorporated into the DEB model. The model was then applied to toxicity data (from the literature or acquired during this thesis) in order to determine which processes are affected by U. Our results show that, from 0 nM onwards, U increases costs for growth and either increases somatic maintenance or decreases assimilation. We were unable to detect effects on maturation. A histological study showed that U alters histology of the gut wall and may perturb host-microbe homeostasis. By accounting for differences in initial conditions between individuals we were able to explain a number of seemingly contradictory results. The take home message is: observations on individuals should not be averaged for groups of individuals
APA, Harvard, Vancouver, ISO, and other styles
5

Kavulich, Michael J. Jr. "Local Dynamics of Synoptic Waves in the Martian Atmosphere." Thesis, 2011. http://hdl.handle.net/1969.1/ETD-TAMU-2011-08-10149.

Full text
Abstract:
The sources and sinks of energy for transient waves in the Martian atmosphere are investigated, applying diagnostic techniques developed for the analysis of terrestrial baroclinic waves to output from a Mars General Circulation Model. These diagnostic techniques include the vertically averaged eddy kinetic energy and regression analysis. The results suggest that the primary source of the kinetic energy of the waves is baroclinic energy conversion in localized regions. It is also shown that there exist preferred regions of baroclinic energy conversion. In addition, it is shown that downstream baroclinic development plays an important role in the evolution of the waves and in the baroclinic energy conversion process. This is the first time that evidence for downstream baroclinic development has been found for an atmosphere other than the terrestrial one.
APA, Harvard, Vancouver, ISO, and other styles

Book chapters on the topic "Kinetic energy budget"

1

Wilczak, James M., James B. Edson, Jørgen Højstrup, and Tetsu Hara. "The Budget of Turbulent Kinetic Energy in the Marine Atmospheric Surface Layer." In Atmospheric and Oceanographic Sciences Library, 153–73. Dordrecht: Springer Netherlands, 1999. http://dx.doi.org/10.1007/978-94-015-9291-8_6.

Full text
APA, Harvard, Vancouver, ISO, and other styles
2

Tang, S. L., N. Lefeuvre, L. Djenidi, R. A. Antonia, and Y. Zhou. "Turbulent Kinetic Energy Budget in the Far Field of a Square Cylinder Wake." In Fluid-Structure-Sound Interactions and Control, 169–74. Berlin, Heidelberg: Springer Berlin Heidelberg, 2015. http://dx.doi.org/10.1007/978-3-662-48868-3_27.

Full text
APA, Harvard, Vancouver, ISO, and other styles
3

Bogey, Christophe, and Christophe Bailly. "Assessment of Dissipation in LES Based on Explicit Filtering from the Computation of Kinetic Energy Budget." In Quality and Reliability of Large-Eddy Simulations, 81–92. Dordrecht: Springer Netherlands, 2008. http://dx.doi.org/10.1007/978-1-4020-8578-9_7.

Full text
APA, Harvard, Vancouver, ISO, and other styles
4

Kaimal, J. C., and J. J. Finnigan. "Spectra and Cospectra Over Flat Uniform Terrain." In Atmospheric Boundary Layer Flows. Oxford University Press, 1994. http://dx.doi.org/10.1093/oso/9780195062397.003.0005.

Full text
Abstract:
Turbulent flows like those in the atmospheric boundary layer can be thought of as a superposition of eddies—coherent patterns of velocity, vorticity, and pressure— spread over a wide range of sizes. These eddies interact continuously with the mean flow, from which they derive their energy, and also with each other. The large “energy-containing” eddies, which contain most of the kinetic energy and are responsible for most of the transport in the turbulence, arise through instabilities in the background flow. The random forcing that provokes these instabilities is provided by the existing turbulence. This is the process represented in the production terms of the turbulent kinetic energy equation (1.59) in Chapter 1. The energy-containing eddies themselves are also subject to instabilities, which in their case are provoked by other eddies. This imposes upon them a finite lifetime before they too break up into yet smaller eddies. This process is repeated at all scales until the eddies become sufficiently small that viscosity can affect them directly and convert their kinetic energy to internal energy (heat). The action of viscosity is captured in the dissipation term of the turbulent kinetic energy equation. The second-moment budget equations presented in Chapter 1, of which (1.59) is one example, describe the summed behavior of all the eddies in the turbulent flow. To understand the conversion of mean kinetic energy into turbulent kinetic energy in the large eddies, the handing down of this energy to eddies of smaller and smaller scale in an “eddy cascade” process, and its ultimate conversion to heat by viscosity, we must isolate the different scales of turbulent motion and separately observe their behavior. Taking Fourier spectra and cospectra of the turbulence offers a convenient way of doing this. The spectral representation associates with each scale of motion the amount of kinetic energy, variance, or eddy flux it contributes to the whole and provides a new and invaluable perspective on boundary layer structure. The spectrum of boundary layer fluctuations covers a range of more than five decades: millimeters to kilometers in spatial scales and fractions of a second to hours in temporal scales.
APA, Harvard, Vancouver, ISO, and other styles
5

O. Olasunkanmi, Lukman. "Corrosion: Favoured, Yet Undesirable - Its Kinetics and Thermodynamics." In Corrosion [Working Title]. IntechOpen, 2021. http://dx.doi.org/10.5772/intechopen.98545.

Full text
Abstract:
This chapter describes the fundamentals of metal corrosion in relation to thermodynamics and kinetics. The chapter is so titled, because corrosion of metal is thermodynamically favourable. Moreover, it impacts negatively on economy and safety. Industries expend a substantial percentage of their budgets on corrosion control, and lose revenue due to corrosion damage. Effects of corrosion on industrial and public infrastructure cannot be overemphasized. Several accidents in the transportation and recreational industries have been linked to corrosion of metallic parts of respective gadgets. Some of these accidents are utterly catastrophic and fatal. Therefore, corrosion, albeit its thermodynamic favouability, is not desired by man. Metals corrode as a way of minimizing energy contents. Active metals are more stable in combined forms such as oxides, sulphides, and hydroxides, even though these forms are less useful to man. It appears the “price” to pay for extracting the pure forms of these metals from their ores is corrosion. This chapter presents fundamentals of thermodynamics and kinetics of metal corrosion, with emphasis on aqueous medium. It promises to serve as an introductory chapter for corrosion science students and as a concise material for tutors.
APA, Harvard, Vancouver, ISO, and other styles

Conference papers on the topic "Kinetic energy budget"

1

Bhusare, Vishal H., Zoheb Khan, and Jyeshtharaj B. Joshi. "BUDGET FOR TURBULENT KINETIC ENERGY AND ENERGY DISSIPATION RATE IN BUBBLE COLUMN REACTORS." In ICHMT International Symposium on Advances in Computational Heat Transfer. Connecticut: Begellhouse, 2017. http://dx.doi.org/10.1615/ichmt.2017.1320.

Full text
APA, Harvard, Vancouver, ISO, and other styles
2

Bhusare, Vishal H., Zoheb Khan, and Jyeshtharaj B. Joshi. "BUDGET FOR TURBULENT KINETIC ENERGY AND ENERGY DISSIPATION RATE IN BUBBLE COLUMN REACTORS." In ICHMT International Symposium on Advances in Computational Heat Transfer. Connecticut: Begellhouse, 2017. http://dx.doi.org/10.1615/ichmt.2017.cht-7.1320.

Full text
APA, Harvard, Vancouver, ISO, and other styles
3

Vyas, Manan A., Mbu Waindim, and Datta V. Gaitonde. "Budget of Turbulent Kinetic Energy in a Shock Wave/Boundary-layer Interaction." In 46th AIAA Fluid Dynamics Conference. Reston, Virginia: American Institute of Aeronautics and Astronautics, 2016. http://dx.doi.org/10.2514/6.2016-3187.

Full text
APA, Harvard, Vancouver, ISO, and other styles
4

Wolf, William, João Luiz F. Azevedo, and Luiz Augusto Camargo Aranha Schiavo. "Large Scale Effects in the Turbulent Kinetic energy Budget of Channel Flows." In 24th ABCM International Congress of Mechanical Engineering. ABCM, 2017. http://dx.doi.org/10.26678/abcm.cobem2017.cob17-0202.

Full text
APA, Harvard, Vancouver, ISO, and other styles
5

Monier, Jean-François, Feng Gao, Jérôme Boudet, Liang Shao, and Lipeng Lu. "BUDGET ANALYSIS OF TURBULENT KINETIC ENERGY IN CORNER SEPARATION : RANS VS LES." In VII European Congress on Computational Methods in Applied Sciences and Engineering. Athens: Institute of Structural Analysis and Antiseismic Research School of Civil Engineering National Technical University of Athens (NTUA) Greece, 2016. http://dx.doi.org/10.7712/100016.2313.7719.

Full text
APA, Harvard, Vancouver, ISO, and other styles
6

Adeyinka, Olusola, and Greg Naterer. "Measured Mean Flow Dissipation and Turbulence Kinetic Energy Budget of the Second Law." In 45th AIAA Aerospace Sciences Meeting and Exhibit. Reston, Virigina: American Institute of Aeronautics and Astronautics, 2007. http://dx.doi.org/10.2514/6.2007-1411.

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

Schiavo, Luiz Augusto A., Antonio B. Jesus, Joao Luiz F. Azevedo, and William R. Wolf. "Adverse Pressure Gradient Effects in the Turbulent Kinetic Energy Budget for Channel Flows." In 53rd AIAA Aerospace Sciences Meeting. Reston, Virginia: American Institute of Aeronautics and Astronautics, 2015. http://dx.doi.org/10.2514/6.2015-1276.

Full text
APA, Harvard, Vancouver, ISO, and other styles
8

Nawab, Ahmad, Feng Wang, Luca di Mare, and John J. Adamczyk. "Reynolds Stress Field and Turbulent Kinetic Energy Budget in a Repeating Compressor Stage." In ASME Turbo Expo 2020: Turbomachinery Technical Conference and Exposition. American Society of Mechanical Engineers, 2020. http://dx.doi.org/10.1115/gt2020-14804.

Full text
Abstract:
Abstract Turbulence modelling in compressor passages continues to be a challenging problem. In order to better understand the shortcomings of turbulence modelling, a LES and a RANS computation were performed of a repeating compressor stage. The computation was carried out near the aerodynamic design point of the compressor stage, in order to minimise the challenge posed to the turbulence model. The use of a repeating stage configuration removes the need to specify the statistics of the incoming turbulent field; the statistics become an output of the simulation and not an input. This is a critical fact that greatly increases the credibility of the current LES compressor simulation over many previous simulations. As the computations are performed at mid-span, radial gradients can safely be assumed to be small, thus removing issues associated with capturing flow features attributed to 3D geometry. The flow field is assumed to be incompressible, which is required in order to achieve a true repeating stage environment. The RANS computation is based on a state-of-the-art turbulence model. At the same flow coefficient, the RANS simulation yielded a total pressure rise very near that of the LES simulation. However, there are nontrivial differences in the flow details. The mean flow and Reynolds shear stress boundary layer profiles are in good agreement in regions of favourable pressure gradient, but significant differences exist in the presence of adverse pressure-gradients. The turbulent kinetic energy profiles however are in poor agreement throughout the flow. The mean flow production rates predicted by the RANS computation are largely similar to those of the LES simulation forward of mid-chord where the pressure gradient is favourable. A notable exception is the leading-edge region where the LES predicts negative production i.e. a net transfer of energy to the time-mean flow, and the region aft of mid-chord where the pressure gradient is adverse. Outside of the viscous sub-layer, the dissipation rates are also predicted correctly by the RANS simulation forward of midchord where the pressure gradient is favourable. Aft of mid-chord however, there are significant differences in the dissipation rates.
APA, Harvard, Vancouver, ISO, and other styles
9

Fick, Lambert H., Elia Merzari, and Yassin A. Hassan. "Calculation of Turbulent Kinetic Energy Budgets for Flow Through a Pebble Bed Using DNS." In 2016 24th International Conference on Nuclear Engineering. American Society of Mechanical Engineers, 2016. http://dx.doi.org/10.1115/icone24-60766.

Full text
Abstract:
Pebble bed high temperature reactors (PBR) are currently being investigated as a potential successor for light water reactor based designs in the future. Past analyses of flows through PBR cores using Reynolds averaged Navier-Stokes (RANS) approaches have had limited success. Due to a lack of available high fidelity experimental or computational data, optimization of RANS closure models for these geometries has not been extensively done. In the present study, direct numerical simulation (DNS) is employed to develop a high fidelity data set which may be used for the optimization of RANS closure models for pebble bed flows. Calculated parameters include turbulence statistics, as well as values for the turbulent kinetic energy (TKE) budget terms. A well documented, single face centered cubic domain with periodic boundaries was used. Flow was simulated at a Reynolds number of 9308. Tests were conducted to ensure sufficient spatial and temporal resolution for conforming to the requirements for DNS. A selection of the generated statistics and TKE budget terms is presented here.
APA, Harvard, Vancouver, ISO, and other styles
10

Nuzhnov, Yu V. "Testing the ASMTurb Method on the Example Modelling of the Budget Equation of Turbulent Kinetic Energy." In ASME 2014 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2014. http://dx.doi.org/10.1115/imece2014-38022.

Full text
Abstract:
The statistical modeling of fluctuating kinetic energy in turbulent and non-turbulent fluid of a turbulent flow are presented and self-similar solutions applied to budget equations of conditionally averaged fluctuating kinetic energy are obtained. The equations were constructed on basis of the method of autonomous statistical modeling of turbulent flows (ASMTurb method) and allow to calculate the conditional averages both fluctuating kinetic energy and terms of the budget equations. The total statistical averages are found with help algebraic ratios between total and conditional averages through the agency of external intermittency factor. Testing the ASMTurb method is presented in the form of ASMTurb model for self-similar region of the two-stream plane mixing layer. Test results showed that the constructed here ASMTurb model is deeper and more accurate than RANS model. A comparison is performed between predictions and known experimental data for energy-containing fluctuating structure of the turbulent flow in mixing layer and excellent agreements are noted.
APA, Harvard, Vancouver, ISO, and other styles
You might also be interested in the extended bibliographies on the topic 'Kinetic energy budget' for particular source types:
Journal articles
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!

To the bibliography