Download or read book APPROCHE DE LA TURBULENCE EN CONVECTION DE RAYLEIGH BENARD FORCEE SPATIALEMENT written by GEORGES.. BALZER and published by . This book was released on 1992 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: NOUS ETUDIONS LES PROPRIETES SPATIO-TEMPORELLES ET LA TRANSITION A LA TURBULENCE DANS UNE EXPERIENCE DE CONVECTION DE RAYLEIGH-BENARD FORCEE SPATIALEMENT EN GEOMETRIE UNIDIMENSIONNELLE. NOUS METTONS EXPERIMENTALEMENT EN EVIDENCE UN EFFET SURPRENANT DE BRISURE DE PARITE QUI SE TRADUIT PAR UNE INCLINAISON SPONTANEE DES COURANTS CONVECTIFS PAR RAPPORT AU FORCAGE. CECI S'INTERPRETE SIMPLEMENT A PARTIR D'UNE EQUATION DE PHASE QUI PREDIT CORRECTEMENT LE DIAGRAMME DE BIFURCATION OBSERVE EXPERIMENTALEMENT. LES COMPORTEMENTS DYNAMIQUES SONT AFFECTES PAR LA BRISURE DE PARITE ET LEUR APPARITION EST HETEROGENE. L'INTERPRETATION DE CES COMPORTEMENTS EST FAITE A PARTIR D'EQUATIONS D'AMPLITUDE FAISANT APPARAITRE UN COUPLAGE ENTRE INCLINAISON ET DEPENDANCE TEMPORELLE

Download or read book Fluctuations in Turbulent Rayleigh B nard Convection written by Yin Wang and published by . This book was released on 2017 with total page 114 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book New Perspectives in Turbulence written by L. Sirovich and published by . This book was released on 1991 with total page 392 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book STRUCTURES SPATIALES ET TURBULENCE DE PHASE EN CONVECTION DE RAYLEIGH BENARD written by Alain Pocheau and published by . This book was released on 1987 with total page 136 pages. Available in PDF, EPUB and Kindle. Book excerpt: ON ANALYSE LA TRANSITION SUR DEUX DECADES DE NOMBRE DE PRANDTL, DU REGIME DE SELECTION DE NOMBRE DE D'ONDE A CELUI DE TURBULENCE DE PHASE. ON DETERMINE LE ROLE DES DEFAUTS DE STRUCTURE. ON IDENTIFIE LA PRESENCE D'ECOULEMENTS DE DERIVE DONT ON DEMONTRE L'IMPORTANCE ENVERS LA FORMATION DES CONTRAINTES. CET EFFET EST ANALYSE PAR UN FORMALISME D'INVARIANCE DE JAUGE. PAR VISUALISATION DE LA CONVECTION EN PHASE GAZEUSE ON CARACTERISE LES MECANISMES DE LA TURBULENCE DE PHASE

Download or read book A Deterministic Approach to Turbulence Chaos in Rayleigh Benard Convection written by P. Berge and published by . This book was released on 1987 with total page 30 pages. Available in PDF, EPUB and Kindle. Book excerpt: Rayleigh-Benard convection is one of the simplest instabilities. It is related to the case of a horizontal layer of a thermally expansive fluid which is confined above and below by rigid plates of good thermal conductivity, submitted to purely vertical adverse thermal gradient (adverse means 'heated from below'). Topics include: Basic concepts about dissipative dynamical systems; Towards deterministic turbulence or chaos; and Some experimental illustrations.

Download or read book Direct Numerical Simulations of Turbulent Rayleigh B nard Convection written by Wei Xu and published by . This book was released on 2020 with total page 104 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Modelling Turbulent Dissipation Correlations for Rayleigh B nard Convection Based on Two point Correlation Technique and Invariant Theory written by Qiao-yan Ye and published by . This book was released on 1998 with total page 47 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Structures Boundary Layers and Plumes in Turbulent Rayleigh B nard Convection written by and published by . This book was released on 2015 with total page 187 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Modelling Turbulent Dissipation Correlations for Rayleigh B nard Convection Based on Two point Correlation Technique Andinvariant Theory written by G. Grötzbach and published by . This book was released on 1998 with total page 47 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Turbulent Rayleigh B nard Convection of Low Prandtl number Gases written by James Douglas Hogg and published by . This book was released on 2012 with total page 256 pages. Available in PDF, EPUB and Kindle. Book excerpt: Spatial power spectra of the shadowgraph images showed peaks at small wavelengths which decreased with increasing Rayleigh number. Only at the highest observed Rayleigh numbers were large-scale structures comparable in size to the height of the cell observed.

Download or read book PROPRIETES SPATIO TEMPORELLES ET TRANSITION VERS LA TURBULENCE EN CONVECTION DE RAYLEIGH BENARD A 1 ET 2 DIMENSIONS written by FRANCOIS.. DAVIAUD and published by . This book was released on 1990 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: NOUS ETUDIONS LES PROPRIETES SPATIO-TEMPORELLES ET LA TRANSITION A LA TURBULENCE DANS DES SYSTEMES D'ECOULEMENTS CONVECTIFS DE RAYLEIGH-BENARD POSSEDANT UNE OU DEUX DIMENSIONS D'ESPACE. LA PREMIERE PARTIE EST CONSACREE A L'ETUDE DE SYSTEMES CONVECTIFS UNIDIMENSIONNELS. ELLE REVELE L'EXISTENCE DE COMPORTEMENTS DYNAMIQUES COLLECTIFS, PUIS UNE TRANSITION VERS LA TURBULENCE VIA UN PHENOMENE D'INTERMITTENCE SPATIO-TEMPOREL CARACTERISE PAR LA COEXISTENCE DE REGIONS ORDONNEES (LAMINAIRES) ET DESORDONNEES (TURBULENTES), QUI EVOLUENT DANS LE TEMPS ET DANS L'ESPACE. NOUS MONTRONS PAR UNE ETUDE STATISTIQUE QUE CETTE EVOLUTION PEUT ETRE DECRITE EN TERMES DE TRANSITION DE PHASE ET QU'ELLE EST SIMILAIRE A LA TRANSITION OBSERVEE DANS CERTAINS MODELES NUMERIQUES, NOTAMMENT EN PERCOLATION DIRIGEE. LA SECONDE PARTIE CONCERNE L'ETUDE DES ROUTES VERS LA TURBULENCE QUI SONT OBSERVEES DANS DES GEOMETRIES ETENDUES ET A FAIBLE NOMBRE DE PRANDTL. LES RESULTATS EXPERIMENTAUX SONT PRESENTES PUIS INTERPRETES DANS LE CADRE D'UN FORMALISME UTILISANT LES EQUATIONS DE PHASE. ILS MONTRENT L'INTERACTION EXISTANT ENTRE LES COURANTS A GRANDE ECHELLE ET LES ECOULEMENTS CONVECTIFS, ET METTENT EN EVIDENCE L'INFLUENCE DES CONDITIONS AUX LIMITES SUR L'EVOLUTION DES STRUCTURES CONVECTIVES

Download or read book Etude Exp rimentale D instabilit s Travers la Convection Turbulente de Rayleigh B nard Et Les Instabilit s de Trajectoires de Bulles en Ascension written by Viswa Maitreyi Moturi and published by . This book was released on 2019 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The present work focuses on two common fluid flow problems namely, Turbulent Rayleigh-Bénard Convection and Path instability of rising bubbles immersed in a liquid. Concerning Rotating Turbulent Rayleigh-Bénard Convection, the flow field and temperature field were measured respectively by Particle Image Velocimetry (PIV) and Laser Induced Fluorescence (LIF) in a vertical plan of symmetry of our cylindrical cell of aspect ratio 1. The weakening of the Large Scale Circulation with decreasing Rossby number - leading to its complete disappearance - was confirmed as well as the formation of vortex columns in the rotation dominated regime. By doing velocity cross correlations, it has been possible to prove experimentally that the vorticity of the columns change direction in the cell's center. The velocity fluctuations in the cell are highly anisotropic and follow a scaling of Ro0.2 in the rotation affected regime. The temperature of the vortex columns as well as of individual plumes has been estimated by LIF measurements. Concerning the Path instability of rising bubbles, small bubbles rise in straight path, whereas beyond a critical size, bubbles rise in zigzag or helical path. Some new experimental points on the marginal stability curve have been obtained by working in silicon oils of 5 and 10 cst and in water. The agreement with the most recent numerical simulations is only partial. The rise velocity, frequency and amplitude of oscillation have also been measured and suggest a supercritical Hopf bifurcation.

Download or read book ICREEC 2019 written by Ahmed Belasri and published by Springer Nature. This book was released on 2020-06-10 with total page 659 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book highlights peer reviewed articles from the 1st International Conference on Renewable Energy and Energy Conversion, ICREEC 2019, held at Oran in Algeria. It presents recent advances, brings together researchers and professionals in the area and presents a platform to exchange ideas and establish opportunities for a sustainable future. Topics covered in this proceedings, but not limited to, are photovoltaic systems, bioenergy, laser and plasma technology, fluid and flow for energy, software for energy and impact of energy on the environment.

Download or read book All it Is It s a Carnival written by Mária Németh Lenke and published by . This book was released on 2007 with total page 164 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Sea Ideas and Observations on Progress in the Study of the Seas written by Bernard LeMéhauté and published by Wiley-Interscience. This book was released on 1962 with total page 648 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Mood Choice in Complement Clauses written by Toth and published by Peter Lang. This book was released on 2008 with total page 168 pages. Available in PDF, EPUB and Kindle. Book excerpt: The volume investigates various approaches to mood distribution and mood variation in lexically selected complement clauses with special reference to Hungarian data. Its primary aim is to show that semantic factors play a crucial role in mood choice. The analysis focuses on the indicative/non-indicative opposition, the latter category includes the subjunctive, the imperative and the conditional. Critical discussion, revision and elaboration of previous semantic approaches pertaining to mood choice are presented, with particular emphasis on the applicability of the various analyses to mood phenomena in Hungarian. The author proposes two novel hypotheses about mood choice in Hungarian complement clauses.

Download or read book Forest Fire Research written by Universidade de Coimbra and published by . This book was released on 2010 with total page 355 pages. Available in PDF, EPUB and Kindle. Book excerpt: