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A-posteriori error estimators and RFB

By Andrea Cangiani and Endre Suli


We derive a posteriori bounds for the residual-free bubble (RFB) method for the solution of convection-dominated diffusion equations. Both linear functional error control and energy norm error control are considered. The implementation of a reliable and efficient $h$ adaptive algorithm is discussed. Finally, we proposed an $hb$ adaptive algorithm in which the local bubble stabilisation is automatically turned off ($b$ derefinement) in large parts of the computational domain during the $h$ refinement process, without compromising the accuracy of the method.\ud \ud The first author acknowledges the financial support of INdAM and EPSRC

Topics: Fluid mechanics, Numerical analysis
Publisher: Unspecified
Year: 2004
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