Abstract
For a generalized quasi-Newtonian flow, a new stabilized method focused on the low-order velocity-pressure pairs, (bi)linear/(bi)linear and (bi)linear/constant element, is presented. The pressure projection stabilized method is extended from Stokes problems to quasi-Newtonian flow problems. The theoretical framework developed here yields an estimate bound, which measures error in the approximate velocity in the W 1,r(Ω) norm and that of the pressure in the L r′(Ω) (1/r + 1/r′ = 1). The power law model and the Carreau model are special ones of the quasi-Newtonian flow problem discussed in this paper. Moreover, a residual-based posterior bound is given. Numerical experiments are presented to confirm the theoretical results.
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Communicated by Xing-ming GUO
Project supported by the Key Technology Research and Development Program of Sichuan Province of China (No. 05GG006-006-2)
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Xie, Cm., Feng, Mf. A new stabilized method for quasi-Newtonian flows. Appl. Math. Mech.-Engl. Ed. 31, 1081–1096 (2010). https://doi.org/10.1007/s10483-010-1344-z
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DOI: https://doi.org/10.1007/s10483-010-1344-z