Partial Differential Equation Non Linear
Mostrando 1-8 de 8 artigos, teses e dissertações.
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1. Integral transform solution of natural convection in a square cavity with volumetric heat generation
The generalized integral transform technique (GITT) is employed to obtain a hybrid numerical-analytical solution of natural convection in a cavity with volumetric heat generation. The hybrid nature of this approach allows for the establishment of benchmark results in the solution of non-linear partial differential equation systems, including the coupled set
Braz. J. Chem. Eng.. Publicado em: 2013-12
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2. Influence of physical and geometrical system parameters uncertainties on the nonlinear oscillations of cylindrical shells
This work investigates the influence of physical and geometrical system parameters uncertainties and excitation noise on the nonlinear vibrations and stability of simply-supported cylindrical shells. These parameters are composed of both deterministic and random terms. Donnell's non-linear shallow shell theory is used to study the non-linear vibrations of th
J. Braz. Soc. Mech. Sci. & Eng.. Publicado em: 2012
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3. Derivaçao de uma Equação Diferencial Parcial Não-Linear na Propagação de Frentes de Reação em Química / Derivation of a partial differential equation in non-linear propagation of fronts from reaction in chemistry
Nesta dissertação deduzimos uma equação de evolução não-linear que modela a propagação vertical de frentes de reação em química. Também resolvemos o problema devalor inicial ∂tu - ∂x u - (∂xu) - (1-∂x) - u = 0, x Є [-π, π], t >0 u(.,0) = ø, 2 π - periódica Demonstrando a boa-postura do Problema de C
Publicado em: 2008
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4. Derivation of a partial differential equation in non-linear propagation of fronts from reaction in chemistry / Derivaçao de uma Equação Diferencial Parcial Não-Linear na Propagação de Frentes de Reação em Química
Nesta dissertação deduzimos uma equação de evolução não-linear que modela a propagação vertical de frentes de reação em química. Também resolvemos o problema devalor inicial ∂tu - ∂x u - (∂xu) - (1-∂x) - u = 0, x Є [-π, π], t >0 u(.,0) = ø, 2 π - periódica Demonstrando a boa-postura do Problema de C
Publicado em: 2008
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5. MODELOS DE DIMENSÃO REDUZIDA PARA ANÁLISE DAS OSCILAÇÕES NÃO-LINEARES E ESTABILIDADE DE CASCAS CILÍNDRICAS / LOW DIMENSIONAL MODELS FOR NONLINEAR VIBRATION ANALYSIS AND STABILITY OF CYLINDRICAL SHELLS.
The nonlinear vibrations and stability of a fluid-filled cylindrical shell is investigated using reduced order models. First, the nonlinear equations of motion of the cylindrical shell are deduced based on the expressions for the potential and kinetic energy, which are obtained using Donnell shallow shell theory. The internal fluid is considered to be irrota
Publicado em: 2008
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6. Metodologia numérica para análise de secagem de grãos em leito fixo pela primeira e segunda Lei da Termodinâmica / Numerical methodology for analyzing deep bed grain drying by first and second laws of Thermodynamics
This work presents a methodology for analyzing deep bed grain dryers by means of the first and second laws of thermodynamics. The thermodynamic modeling is a more complex extension of a literature-available thermodynamic modeling of fluidized bed dryers, which involves a system of lumped mass and energy equations. Thus, the present analysis involved a system
Publicado em: 2008
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7. Solidificação de ligas binarias : existencia de soluções de modelos do tipo campo de fase
In this work we present results of existence of solutions for some mathematical models of phase- field type for solidification of binary alloys. Firstly, we consider a model based on a highly non-linear degenerate parabolic system of partial differential equations, with three independent variables: phase-field, solute concentration and temperature. After tha
Publicado em: 2002
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8. Determinação da frente de um banco de fluido não-mewtoniano em um reservatorio com poço parcialmente completado
Water production due to water coning means great losses, inducing reduction in oil production and additional pressure drop in the reservoir, not mentioning the costs for disposal of the produced water - a major pollutant. One method used to decrease water production from coning is the injection of a non-newtonian fluid into the near wellbore region of the re
Publicado em: 1994