Enhanced Coercivity for Pure Advection and Advection–Diffusion Problems
✍ Scribed by Claudio Canuto
- Publisher
- Springer US
- Year
- 2006
- Tongue
- English
- Weight
- 213 KB
- Volume
- 28
- Category
- Article
- ISSN
- 0885-7474
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We analyse the eect of the subgrid viscosity on a ®nite element discretisation, with piecewise linear elements, of a linear advection± diffusion scalar equation. We point out the importance of a proper tune-up of the viscosity coef®cient, and we propose a heuristic method for obtaining reasonable va
This work presents a general framework for approximating advection-diffusion equations based on principles of scale separation. A two-level decomposition of the discrete approximation space is performed and the local problem is modified to capture both local and nonlocal discontinuities. The new fea