Título: | NUMERICAL SOLUTION OF COMPRESSIBLE AND INCOMPRESSIBLE FLOW IN IRREGULAR GEOMETRIES | ||||||||||||
Autor: |
ERNESTO RIBEIRO RONZANI |
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Colaborador(es): |
ANGELA OURIVIO NIECKELE - Orientador |
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Catalogação: | 10/NOV/2011 | Língua(s): | PORTUGUESE - BRAZIL |
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Tipo: | TEXT | Subtipo: | THESIS | ||||||||||
Notas: |
[pt] Todos os dados constantes dos documentos são de inteira responsabilidade de seus autores. Os dados utilizados nas descrições dos documentos estão em conformidade com os sistemas da administração da PUC-Rio. [en] All data contained in the documents are the sole responsibility of the authors. The data used in the descriptions of the documents are in conformity with the systems of the administration of PUC-Rio. |
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Referência(s): |
[pt] https://www.maxwell.vrac.puc-rio.br/projetosEspeciais/ETDs/consultas/conteudo.php?strSecao=resultado&nrSeq=18648&idi=1 [en] https://www.maxwell.vrac.puc-rio.br/projetosEspeciais/ETDs/consultas/conteudo.php?strSecao=resultado&nrSeq=18648&idi=2 |
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DOI: | https://doi.org/10.17771/PUCRio.acad.18648 | ||||||||||||
Resumo: | |||||||||||||
The present work consists in the development of a numerical method
of solution of compressible and incompressible fluid flow for all
speed in iregular geometries. A boundary-fitted two-dimensional
nonorthogonal curvilinear coordinate systeam is utilized. The cartesian
velocity components are the dependent variables in the momentum
equations and covariant velocity components are used in the continuity
equation.
The finite-volume technique was selected to discretuze the steady-state
physical phenomenon conservation equations, since this method keeps the conservative
property of the equations and its physical consistency in the numerical
process. A nonstaggered grid was employed, and all dependent variables
are evaluated at the cell center points, which divides the physical
domain. The convection-diffusion fluxes at the control volumes
faces are evaluated with the Power Law and Quick shemes. Special
attention is paid to the numerical treatment of boundary conditions.
The problem of velocity-pressure-density coupling is solved
using a combination of continuity, momentum equations and state equation
resulting in two pressure correction equations. The first equation
corrects the density and the pressure, the second equation corrects
the mass flux and the velocity. A modification in the velocity correction
equations is proposed using a compensationterm to accelerate the convergence. Several
types of interpolation of the face density are used to reduce variable atenuations, caused
by false diffusion.
For the solution of the resulting algebric equations,the line-by-line TDMA algorith is used
as well as a block-correction method to accelerate the convergence.
The proposed method is verified on six test problems,by comparing the present
results with analytical and numerical results avaiable in the
literature.
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