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- False_diffusion abstract "False diffusion is a type of error observed when the upwind scheme is used to approximate the convection term in convection–diffusion equations. The more accurate central difference scheme can be used for the convection term, but for grids with cell Peclet number more than 2, the central difference scheme is unstable and the simpler upwind scheme is often used. The resulting error from the upwind differencing scheme has a diffusion-like appearance in two- or three-dimensional co-ordinate systems and is referred as "false diffusion". False-diffusion errors in numerical solutions of convection-diffusion problems, in two- and three-dimensions, arise from the numerical approximations of the convection term in the conservation equations. Over the past 20 years many numerical techniques have been developed to solve convection-diffusion equations and none are problem free, but false diffusion is one of the most serious problems and a major topic of controversy and confusion among numerical analysts.".
- False_diffusion thumbnail Upwind_differencing_scheme.jpg?width=300.
- False_diffusion wikiPageID "37827725".
- False_diffusion wikiPageRevisionID "603903726".
- False_diffusion hasPhotoCollection False_diffusion.
- False_diffusion subject Category:Computational_fluid_dynamics.
- False_diffusion subject Category:Numerical_differential_equations.
- False_diffusion comment "False diffusion is a type of error observed when the upwind scheme is used to approximate the convection term in convection–diffusion equations. The more accurate central difference scheme can be used for the convection term, but for grids with cell Peclet number more than 2, the central difference scheme is unstable and the simpler upwind scheme is often used.".
- False_diffusion label "False diffusion".
- False_diffusion label "人工粘性".
- False_diffusion sameAs 人工粘性.
- False_diffusion sameAs m.0n_g5hv.
- False_diffusion sameAs Q5432694.
- False_diffusion sameAs Q5432694.
- False_diffusion wasDerivedFrom False_diffusion?oldid=603903726.
- False_diffusion depiction Upwind_differencing_scheme.jpg.
- False_diffusion isPrimaryTopicOf False_diffusion.
