Estudo numérico de escoamento turbulento em padrão anular gás-líquido em dutos verticais

Multiphase flows in ducts can adopt several morphologies depending on the mass fluxes and the fluids properties. Annular flow is one of the most frequently encountered flow patterns in industrial applications. For gas liquid systems, it consists of a liquid film flowing adjacent to the wall and a gas core flowing in the center of the duct. This work presents a numerical study of this flow pattern in gas liquid systems in vertical ducts. For this, a solution algorithm was developed and implemented in FORTRAN 90 to numerically solve the governing transport equations. The mass and momentum conservation equations are solved simultaneously from the wall to the center of the duct, using the Finite Volumes Technique. Momentum conservation in the gas liquid interface is enforced using an equivalent effective viscosity, which also allows for the solution of both velocity fields in a single system of equations. In this way, the velocity distributions across the gas core and the liquid film are obtained iteratively, together with the global pressure gradient and the liquid film thickness. Convergence criteria are based upon satisfaction of mass balance within the liquid film and the gas core. For system closure, two different approaches are presented for the calculation of the radial turbulent viscosity distribution within the liquid film and the gas core. The first one combines a k- Ɛ one-equation model and a low Reynolds k-Ɛ model. The second one uses a low Reynolds k- Ɛ model to compute the eddy viscosity profile from the center of the duct right to the wall. Appropriate interfacial values for k e Ɛ are proposed, based on concepts and ideas previously used, with success, in stratified gas liquid flow. The proposed approaches are compared with an algebraic model found in the literature, specifically devised for annular gas liquid flow, using available experimental results. This also serves as a validation of the solution algorithm

O financiamento da política de assistência social no contexto do SUAS: tendências e particularidades do município do Natal-RN

This dissertation analyzes the configuration of the financing of Social assistance in the municipality of Natal-RN in the context of their particular expressions of the problematizando municipal budget against neoliberal adjustment macroeconomic policy. The current trends of "disclaimer" and "desfinanciamento" of social protection by the State, in the context of contemporary capitalism, bring strong implications for Social Security, especially through the redirection of public resources to the international capital, which highlights the overlapping economic interests on social needs. Whereas the changes and innovations occurring in connection with the financing of Social assistance policy, the goal of this documentary research is to identify the characteristics and trends of funding this policy in Natal-RN, from the secondary data analysis from the City of Natal, the Ministry of Social development and hunger and Portal of transparency. In the light of the theoretical, research now presented, shows trends of investment in Social assistance in the municipality of Natal-RN, in the period 2005 to 2009, which are: the tiny role membership (08) Social assistance in the municipal budget; the dispersion and fragmentation of the resources of Social assistance in other organs and/or secretariats of municipal administration; the participation of just 47.5% in expenditure from own organ Manager; the low percentage of implementation of resources foreseen in the Annual Budget Laws; the low allocation of resources in Municipal Social Assistance Fund (FUMAS), which contradicts the national policy for Social Assistance-PNAS/2004; and the predominance of government transfers in the composition of the resources of Social assistance in the municipality. The results of this research suggest that the process of financing of Social assistance in Natal is distant from the principles and guidelines pointed by PNAS/2004. In addition to the effort to understand the complexity of the financing of Social assistance in Natal, this work seeks to contribute to a political analysis in the direction of strengthening social control and the struggle for the expansion of investment in social spending

A constituição desmilitarizada: democratização e reforma do sistema constitucional de segurança pública

The normative construction of the public security system in the Constituent Assembly of 1987-1988 preserved paradoxical normative space, the military police linked to the Army with a restrictive legal statute of the police offices citizenship through a hierarchical and disciplinary model that is anachronistic. This research originates from the following problem: How is it possible to tailor the constitutional system of public safety, specifically the Military Police, according to the democratic paradigms constructed by the Constituent from 1988 and carry the right to public safety under these molds? The militarists limitations of the Constitution allowed the growing militarization of police departments, organizational culture and authoritarian institutional practices. Underlying this, the problems related to difficulties in realization of Right to Public Safety, the strikes of the military police, the incomplete policy cycle started demanding from the constitutional-legal system appropriate responses. Utilizing the dialogical method and an interdisciplinary approach to the subject, and theoretically grounded in overcoming of the constitutional normativist juspositivism.It was found that the constructed infraconstitutional legislation was insufficient to supply the systemic shortcomings of constitutional law, when looking to create a single system of public security without giving due scope to the federal principle and expand the autonomy the Federated States, and even grant democratic legal status to the military police. Formal legal limits imposed by the Constitution constructed a legal anachronism, the military police. Thus, a democratic reading of military police institutions becomes inconceivable its existence in the constitutional regulatory environment. Thus, reform the Constitution in order to demilitarize the police and conduct a normative redesign of the public security system is fundamental to Brazilian constitutional democracy

A gestão do programa saúde na escola no município de Natal/RN: um estudo de caso

The current conception of health deals with several influential factors, having education among them. Intersectoral organization is essential for Young and adult healthcare services. In this context the Healthcare in School Program was created which foresees a continuous articulation between health and education aiding the effectuation of the Healthcare Single System. The objective of this research is analyze the Healthcare in School Program (HSP) in Natal city in Rio Grande do Norte State taking into consideration the Intersectoriality of actions from the standpoint of the management. The chosen method was the case study, with qualitative approach. The sample was of the intentional kind including all components of the Natal city Intersectorial work group, composed by representatives of the Municipal Education Bureau, the State Education Bureau and Healthcare Municipal Bureau. The collecting data technique was the semi-structured interview. The data analysis was performed through the analysis of contents technique. For Data Show the following analysis categories were considered: Meaning of Intersectoriality; Actions Planning; Permanent and ongoing training for autonomy regarding to Healthcare Promotion; Difficulties and Potentials for actions operationalization. The outcomes allow us to indentify in Natal HSP intersectoral practices not developed yet. The manager professionals of Healthcare and Education do not get to acknowledge the power of Intersectoriality yet. The lack of commitment of some professionals stands out, planning is performed in a sectorial basis and without active participation of learners and community, there is duties accumulation and discouragement group, structural inadequacy and difficulty on the ongoing of the program actions. Despite the existing fragmentation, the program has contributed to the professional qualification and development of education actions regarding to healthcare along with learners. Therefore we conclude that healthcare, education and society have lots of challenges to face in order to consolidate Intersectoriality and the Healthcare in School Program and the and the implementation of the guidelines of the Healthcare Single System in Natal city in the state of Rio Grande do Norte.