Development of a low-Reynolds-number k-ω model for FENE-P fluids

A low-Reynolds-number k-ω model for Newtonian fluids has been developed to predict drag reduction of viscoelastic fluids described by the FENE-P model. The model is an extension to viscoelastic fluids of the model for Newtonian fluids developed by Bredberg et al. (Int J Heat Fluid Flow 23:731-743, 2002). The performance of the model was assessed using results from direct numerical simulations for fully developed turbulent channel flow of FENE-P fluids. It should only be used for drag reductions of up to 50 % (low and intermediate drag reductions), because of the limiting assumption of turbulence isotropy leading to an under-prediction of k, but compares favourably with results from k-ε models in the literature based on turbulence isotropy. © 2012 Springer Science+Business Media Dordrecht.

A Reynolds stress model for turbulent flows of viscoelastic fluids

A second-order closure is developed for predicting turbulent flows of viscoelastic fluids described by a modified generalised Newtonian fluid model incorporating a nonlinear viscosity that depends on a strain-hardening Trouton ratio as a means to handle some of the effects of viscoelasticity upon turbulent flows. Its performance is assessed by comparing its predictions for fully developed turbulent pipe flow with experimental data for four different dilute polymeric solutions and also with two sets of direct numerical simulation data for fluids theoretically described by the finitely extensible nonlinear elastic - Peterlin model. The model is based on a Newtonian Reynolds stress closure to predict Newtonian fluid flows, which incorporates low Reynolds number damping functions to properly deal with wall effects and to provide the capability to handle fluid viscoelasticity more effectively. This new turbulence model was able to capture well the drag reduction of various viscoelastic fluids over a wide range of Reynolds numbers and performed better than previously developed models for the same type of constitutive equation, even if the streamwise and wall-normal turbulence intensities were underpredicted.

Linnaeus's Plantae Surinamenses revisited

In 1775, Jacob Alm defended the Linnaean dissertation Plantae Surinamenses under the precidency of Carolus Linnaeus. In this account of Surinamese plants preserved in alcohol, given to Linnaeus by the King Gustavus III of Sweden, 148 species were treated, 117 of them with species names determined. Fifteen other species were indicated as new, but were neither described nor named, and 16 species were identified only to genus level. Here, the taxonomic identity and nomenclatural status of those names are updated and discussed. Five of the 117 names and also 11 of their synonyms, a species name described by Rottboll and ten described by Linnaeus filius are lectotypified. Two new combinations and a new name are proposed, and two new synonyms are established.

Linnaeus's plantæ Surinamenses revisited

In 1775, Jacob Alm defended the Linnaean dissertation Plantæ Surinamenses under the precidency of Carolus Linnaeus. In this account of Surinamese plants preserved in alcohol, given to Linnaeus by the King Gustavus III of Sweden, 148 species were treated, 117 of them with species names determined. Fifteen other species were indicated as new, but were neither described nor named, and 16 species were identified only to genus level. Here, the taxonomic identity and nomenclatural status of those names are updated and discussed. Five of the 117 names and also 11 of their synonyms, a species name described by Rottbøll and ten described by Linnaeus filius are lectotypified. Two new combinations and a new name are proposed, and two new synonyms are established. © 2012 Magnolia Press.

Estudos preliminares com proteínas de Neurospora crassa identificadas em complexos DNA-proteína

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

TV, Lobato e o ato da leitura: a mediação dos sentidos através da narrativa ficcional da TV brasileira

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Credibilidade, segurança e fé: o uso do jornalismo na programação religiosa da Record

Pós-graduação em Comunicação - FAAC

A Igreja Universal e a política: o caso de Marília

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Ação de forças gravitacionais e não gravitacionais sobre o movimento orbital de satélites artificiais

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

A expressão da cultura nobiliárquica nos livros de viagens medievais

Pós-graduação em História - FCHS

Sindicato de Mágicos: uma história cultural da Igreja Universal do Reino de Deus (1977-2006)

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

O racismo como questão epistemológica: uma interpretação do discurso religioso evolucionista da Igreja Universal do Reino de Deus

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Um espelho esmaecido: o reino visigodo de Toledo, cristianismo e monarquia

This paper aims to present some characteristics of Hispania in Late Antiquity and Early Middle Ages (4th-8th centuries). Search through a brief analysis of the relationship between Christianity and the Catholic Monarchy stood raise some issues and questions. We understand that Christianity has played and plays a significant role in the historical development of the Iberian countries. But in its installation and attempt to consolidation as hegemonic religion in the peninsula, faced several challenges. His alliance with the monarchy stood represented one of the ways to make stronger its dominance. In turn, the Monarchy, preserving its characteristic elective associated strongly with Christianity, giving him a theocratic character trying to raise the sovereign above the fray aristocratic, without much success. Thus, our text points to some of the paths followed by these two elements, Christianity and Monarchy at the time of the Kingdom of Toledo, proposing more reflections and ways that effectively covering them. We hope to have achieved it.

O reino Visigodo: catolicismo e permanências pagãs

What became accustomed to call “paganism” is undoubtedly one of the most significant forms of what is designated as “popular religiosity”. This expression, which seems useful when a generalization is required, shows all its weakness when a more precise and objective observation of a particular religion is attempted. Would the official visigothic kingdom’s “conversion” to Catholicism, with Recardo (586-601) at the Council of Toledo of 589 have effectively matched to the “conversion” of this kingdom’s population? Firstly, it is necessary to consider, in beyond the exalting intentions of the sources of that moment, that mass conversions do not imply a radical change in the convictions and religious practices of an entire people. Secondly, that “conversion” and “Christianization” are not synonymous. “Religiosity”, which includes the “conversion”, implies a fundamental religious attitude, which can simply be interior and personal. On the other hand, “religion”, in which “Christianization” is included, would correspond to a public aspect, institutionalized, which elaborates a set of techniques aiming, as in the case of “religiosity”, the guarantee of the supernatural Thus, elevated to the position of “official religion,” Catholic Christianity would live with a series of rites, rituals, devotions, from the previous “religiosity” that, through its ecclesiastical perspective, would be reprehensible, considered marginal and something that would lead to error. However, on the eve of the Muslim invasion in 711, not only among the laity but even in ecclesiastical segments, the manifestations of the “paganism” still were aim of coactive condemnation in the Catholic kingdom of Toledo’s councils.

Conversões e negociações: um estudo dos relatos de missionários protestantes da Church Missionary Society em Uganda-África (1876-1890)

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)