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You searched for subject:(Turbulent transport coefficients). Showing records 1 – 2 of 2 total matches.

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Pontifical Catholic University of Rio de Janeiro

1. HARRY T MAIA VINAGRE. [en] EXPERIMENTAL DETERMINATION OF THE HEAT TRANSFER COEFFICIENT IN DUCTS OF ELLIPTICAL CROSS SECTION.

Degree: 2018, Pontifical Catholic University of Rio de Janeiro

[pt] Determinou-se experimentalmente o coeficiente local de troca de calor, para o escoamento turbulento interno, em tubos de seção transversal elíptica. As condições de contorno impostas foram, temperatura constante na parede e entrada abrupta, com canto vivo, em uma placa plana. Foram obtidos resultados na região de entrada e na região desenvolvida, cobrindo a faixa de número de Reynolds de 7 000 a 60 000. Foram investigadas as razões de aspecto 0,12, 0,25 e 0,5 e os resultados, comparados com os encontrados na literatura para placa plana e tubo circular. Uma diferença máxima de 16 por cento, foi encontrada em relação aos resultados para tubo circular. Portanto, a utilização de tubos elípticos em trocadores de calor é, em geral, vantajosa do ponto de vista térmico.

[en] Experiments were performed to determine local heat transfer coefficients for the turbulent flow in a duct with elliptical cross section. The boundary conditions imposed were isothermal wall and abrupt-contraction at the entrance built into a large wall. Both entrance-region and fully-developed results were obtained, whereas the Reynolds number was varied in the overall range 7,000-60,000. The aspect ratios 0.12, 0.25 and 0.5 were investigated and the results compared with the ones for parallel planes and for circular tubes, found in the open literature. The measured heat transfer coefficients displayed a maximum deviation of 16 percent relative to the results for the circular tube. Therefore, using elliptical ducts in heat exchangers is in general advisable as far as heat transfer is concerned.

Advisors/Committee Members: PAULO ROBERTO DE SOUZA MENDES.

Subjects/Keywords: [pt] ESCOAMENTO TURBULENTO; [en] TURBULENT FLOW; [pt] TUBOS ELIPTICOS; [en] ELLIPTICAL TUBES; [pt] COEFICIENTES DE TRANSPORTE; [en] TRANSPORT COEFFICIENTS

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APA (6th Edition):

VINAGRE, H. T. M. (2018). [en] EXPERIMENTAL DETERMINATION OF THE HEAT TRANSFER COEFFICIENT IN DUCTS OF ELLIPTICAL CROSS SECTION. (Thesis). Pontifical Catholic University of Rio de Janeiro. Retrieved from http://www.maxwell.vrac.puc-rio.br/Busca_etds.php?strSecao=resultado&nrSeq=33283

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16th Edition):

VINAGRE, HARRY T MAIA. “[en] EXPERIMENTAL DETERMINATION OF THE HEAT TRANSFER COEFFICIENT IN DUCTS OF ELLIPTICAL CROSS SECTION.” 2018. Thesis, Pontifical Catholic University of Rio de Janeiro. Accessed October 30, 2020. http://www.maxwell.vrac.puc-rio.br/Busca_etds.php?strSecao=resultado&nrSeq=33283.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7th Edition):

VINAGRE, HARRY T MAIA. “[en] EXPERIMENTAL DETERMINATION OF THE HEAT TRANSFER COEFFICIENT IN DUCTS OF ELLIPTICAL CROSS SECTION.” 2018. Web. 30 Oct 2020.

Vancouver:

VINAGRE HTM. [en] EXPERIMENTAL DETERMINATION OF THE HEAT TRANSFER COEFFICIENT IN DUCTS OF ELLIPTICAL CROSS SECTION. [Internet] [Thesis]. Pontifical Catholic University of Rio de Janeiro; 2018. [cited 2020 Oct 30]. Available from: http://www.maxwell.vrac.puc-rio.br/Busca_etds.php?strSecao=resultado&nrSeq=33283.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

VINAGRE HTM. [en] EXPERIMENTAL DETERMINATION OF THE HEAT TRANSFER COEFFICIENT IN DUCTS OF ELLIPTICAL CROSS SECTION. [Thesis]. Pontifical Catholic University of Rio de Janeiro; 2018. Available from: http://www.maxwell.vrac.puc-rio.br/Busca_etds.php?strSecao=resultado&nrSeq=33283

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

2. Simard, Corinne. Détermination des coefficients de transport turbulent et analyse des cycles magnétiques produits dans un modèle dynamo en champ moyen avec et sans rétroaction magnétique.

Degree: 2017, Université de Montréal

Subjects/Keywords: Effet Alpha; Diffusivité turbulente; Dynamo solaire; Modèle dynamo en champ moyen; Coefficient de transport turbulent; Grand minimum; Alpha effect; Turbulent diffusivity; Solar dynamo; Mean field dynamo model; Turbulent transport coefficients; Grand minima; Physics - Astronomy and Astrophysics / Physique - Astronomie et astrophysique (UMI : 0606)

…détermination des coefficients de transport turbulent, autant du tenseur α que du tenseur de diffusion… …CHARACTERISATION OF THE TURBULENT EMF 37 2.1 Abstract… …Magnetic quenching of the turbulent emf . . . . . . . . . . . . . . . . . . . . . 55 2.5.1 α… …34 2.1 Time series of the turbulent electromagnetic force… …52 2.5 Mean azimutal turbulent electromotive force and its reconstruction… 

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6th Edition):

Simard, C. (2017). Détermination des coefficients de transport turbulent et analyse des cycles magnétiques produits dans un modèle dynamo en champ moyen avec et sans rétroaction magnétique. (Thesis). Université de Montréal. Retrieved from http://hdl.handle.net/1866/19303

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16th Edition):

Simard, Corinne. “Détermination des coefficients de transport turbulent et analyse des cycles magnétiques produits dans un modèle dynamo en champ moyen avec et sans rétroaction magnétique.” 2017. Thesis, Université de Montréal. Accessed October 30, 2020. http://hdl.handle.net/1866/19303.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7th Edition):

Simard, Corinne. “Détermination des coefficients de transport turbulent et analyse des cycles magnétiques produits dans un modèle dynamo en champ moyen avec et sans rétroaction magnétique.” 2017. Web. 30 Oct 2020.

Vancouver:

Simard C. Détermination des coefficients de transport turbulent et analyse des cycles magnétiques produits dans un modèle dynamo en champ moyen avec et sans rétroaction magnétique. [Internet] [Thesis]. Université de Montréal; 2017. [cited 2020 Oct 30]. Available from: http://hdl.handle.net/1866/19303.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Simard C. Détermination des coefficients de transport turbulent et analyse des cycles magnétiques produits dans un modèle dynamo en champ moyen avec et sans rétroaction magnétique. [Thesis]. Université de Montréal; 2017. Available from: http://hdl.handle.net/1866/19303

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

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