Grid Modi cation for the Wave Equation with Attenuation 1
نویسنده
چکیده
The wave equation with attenuation due to a linear friction is approximated by a new mixed nite element method which allows one to use diierent grids and basis functions at diierent times when necessary. This method enables one to track sharp moving wave fronts more eeciently and accurately. Error estimates with optimal convergent rates are established. Unconditional stability is also proved for this method.
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