In this work a tubular array (four tubes) subjected to a transverse forced flow is analyzed in terms of thermal performance. Taking into account that there are two main assembles usually used in heat exchanger ...

The present paper shows a numerical study concerned with the geometrical optimization of a vortex tube device by means of Constructal Design for several inlet stagnation pressures. In the present study, it is evaluated a ...

This paper applies Constructal design to study the geometry of a X-shaped cavity that penetrates into a solid conductive wall. The objective is minimizing the dimensionless maximal excess of temperature between the solid ...

This work applies Constructal design to study numerically the geometry of cavities bathed by a fluid with constant heat transfer coefficient that are intruded into a cylindrical solid body. The objective is to minimize the ...

This paper applies constructal design to study the geometry of a X-shaped cavity that penetrates into a solid conducting wall. The objective is to minimize the maximal dimensionless excess of temperature between the solid ...

Constructal Design is applied to geometric optimization of an insulated wall bioreactor. The optimization of the bioreactor geometry allows that it to operate, below a certain temperature limit, without external cooling ...

This paper considers the numerical optimization of a T-shaped assembly of fins cooling a cylindrical solid body. The objective is to minimize the maximum excess of temperature between the solid cylindrical body and the ...

The purpose here is to investigate, by means of the constructal principle, the influence of the convective heat transfer flux at the cavity surfaces over the optimal geometry of a T-shaped cavity that intrudes into a solid ...

Este artigo considera o design constructal de um corpo cilíndrico sólido arrefecido por duas aletas na forma T. O objetivo é minimizar o máximo excesso de temperatura entre o corpo cilíndrico e sólido a temperatura ambiente. ...

The cracking phenomenon in concrete gravity dams during the construction phase is analysed in this work. Stresses due to the self-weight of the dam, thermal gradients, creep and drying shrinkage are computed, taking into ...

Aims This research evaluated the utilization of a urease in-house test, culture and molecular method (ureA PCR) as a diagnostic tool for Helicobacter pylori infection. Furthermore, we assessed the presence of the cagA gene ...

A recently proposed methodology for measuring the diffusion coefficient of chloride ions through concrete partially saturated with water, has been applied to five high-early-strength Portland cement mortars. The method is ...

O objetivo deste trabalho é analisar a influência da profundidade relativa da linha neutra, adotada no dimensionamento à flexão simples, sobre a ductilidade de vigas e lajes de concreto armado. O trabalho compreende uma ...

Neste trabalho é feito um estudo comparativo dos métodos de dimensionamento de vigas de concreto armado submetidas à torção, apresentados nas principais normas de projeto. Através de um exemplo numérico, mostra-se a ...

É proposto, neste artigo, o estudo da Educação Ambiental (EA) e a discussão de seus objetivos e métodos no ambiente acadêmico da Universidade e sua aplicação do conhecimento no labor antrópico da nossa sociedade. Realizou-se ...

A educação em saúde constitui papel do enfermeiro nos diferentes contextos de trabalho. Observa-se que essas ações nem sempre são adequadas. Pressupõe-se, como uma das causas para isso, o despreparo teórico dos profissionais. ...

Many steel structures such as ships and offshore structures are composed by welded stiffened or unstiffened plate elements. Cutouts are often provided in these plate elements for inspection, maintenance, and service purposes, ...

Este trabalho apresenta um breve estudo sobre energia das ondas do mar bem como a modelagem computacional de um dispositivo do tipo galgamento. A simulação foi realizada através do software de Dinâmica dos Fluidos Computacional ...

This work proposes an energetic and exergetic thermodynamic analysis of two refrigeration systems: one is a conventional two stages cooling system by steam compression of ammonia and the other is named integrated refrigeration ...

Este artigo analisa a alocação dos idosos no mercado de trabalho brasileiro identificando os determinantes das chances de emprego nas diferentes categorias de ocupação. Considerando os dados da PNAD de 2007 e um modelo ...