Spectral Elements for Transport-Dominated Equations

1. Front Matter

   Pages N1-x

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2. The Poisson Equation in the Square

   • Daniele Funaro

   Pages 1-29

3. Steady Transport-Diffusion Equations

   • Daniele Funaro

   Pages 31-54

4. Other Kinds of Boundary Conditions

   • Daniele Funaro

   Pages 55-74

5. The Spectral Element Method

   • Daniele Funaro

   Pages 75-125

6. Time Discretization

   • Daniele Funaro

   Pages 127-162

7. Extensions

   • Daniele Funaro

   Pages 163-185

8. Back Matter

   Pages 187-215

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In the last few years there has been a growing interest in the development of numerical techniques appropriate for the approximation of differential model problems presenting multiscale solutions. This is the case, for instance, with functions displaying a smooth behavior, except in certain regions where sudden and sharp variations are localized. Typical examples are internal or boundary layers. When the number of degrees of freedom in the discretization process is not sufficient to ensure a fine resolution of the layers, some stabilization procedures are needed to avoid unpleasant oscillatory effects, without adding too much artificial viscosity to the scheme. In the field of finite elements, the streamline diffusion method, the Galerkin least-squares method, the bub­ ble function approach, and other recent similar techniques provide excellent treatments of transport equations of elliptic type with small diffusive terms, referred to in fluid dynamics as advection-diffusion (or convection-diffusion) equations. Goals This book is an attempt to guide the reader in the construction of a computa­ tional code based on the spectral collocation method, using algebraic polyno­ mials. The main topic is the approximation of elliptic type boundary-value par­ tial differential equations in 2-D, with special attention to transport-diffusion equations, where the second-order diffusive terms are strongly dominated by the first-order advective terms. Applications will be considered especially in the case where nonlinear systems of partial differential equations can be re­ duced to a sequence of transport-diffusion equations.

• Gebietszerlegungsmethoden
• Spektralkollokationsverfahren
• Transport-dominierte Gleichungen
• domain decomposition method
• fluid dynamics
• partial differential equation
• spectral collocation method
• transport dominated equations
• complexity

• Dipartimento di Matematica, Università di Modena, Modena, Italy

  Daniele Funaro

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