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Modelagem numérica do escoamento ao redor de cilindros aquecidos rotativos em regime laminar e turbulento.
| Content Provider | Semantic Scholar |
|---|---|
| Author | Vieira, Ariane Neale Ramos |
| Copyright Year | 2017 |
| Abstract | The fluid dynamic analysis of flows with heat transfer in the presence of heated immersed bodies is applied to different practical situations: heat exchangers, heaters, electronic devices, heated rollers and others. Once the problem of stationary bodies has a considerable number of published work, problems in which there are flows over moving bodies are more uncommon on literature. Moreover, for situations in which these bodies are also heated, it is necessary to analyze the influence of the heat transfer phenomena on the fluid and vice versa. In the Immersed Boundary Method (IBM) a force and energy term due to the body presence are added in the source term of Navier-Stokes and Energy equations. The immersed geometry is represented by a lagrangian mesh overlying the eulerian mesh of the domain. With this procedure, simulations with complex or moving geometries such as the fluid-structure interaction problem are simplified compared to conventional methodologies with adaptive meshes. The Virtual Physical Model (VPM) is a mathematical model developed by Lima E Silva (2002) to evaluate the lagrangian force and the energy source term, it has been proved to be very competitive compared to conventional approaches. In this work, the heat transfer and the fluid dynamic over a heated circular rotating cylinder were simulated for different values of Reynolds and Richardson numbers and different specific rotations, for laminar and turbulent flows. It was used a two-dimensional program based on IBM/VPM methodology and it was also simulated cases using the OpenFOAM program. Time evolution of drag and lift coefficients and Nusselt numbers were analyzed. The mean values of Cd, Cl and Nusselt and instantaneous fields of temperature and vorticity were also presented. The results were compared with the literature and demonstrated good agreement between them. It was proposed an empirical correlation for the Nusselt number, as a function of Reynolds number and specific rotation using the OpenFOAM results. This correlation demonstrate good agreement with the simulated data. |
| File Format | PDF HTM / HTML |
| Alternate Webpage(s) | https://repositorio.unifei.edu.br/xmlui/bitstream/handle/123456789/812/dissertacao_vieira1_2017.pdf?isAllowed=y&sequence=1 |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
