Abstract
The Gauge-Uzawa method (GUM) in (9) which is a projection type al- gorithm to solve evolution Navier-Stokes equations has many advantages and supe- rior performance. But this method has been studied for backward Euler time discrete scheme which is the first order technique, because the classical second order GUM re- quests rather strong stability condition. Recently, the second order time discrete GUM was modified to be unconditionally stable and estimated errors in (12). In this paper, we contemplate several GUMs which can be derived by the same manner within (12), and we dig out properties of them for both stability and accuracy. In addition, we evaluate an stability condition for the classical GUM to construct an adaptive GUM for time to make free from strong stability condition of the classical GUM.
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