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object --+ | escript.modelframe.LinkableObject --+ | escript.modelframe.ParameterSet --+ | escript.modelframe.Model --+ | SteadyIncompressibleFlow
-\left(\eta\left(v_{i,j}+v_{j,i} ight) ight)_{,j}+p_{,i}=F_i
\sigma_{ij}=2\eta D_{ij}-p\,\delta_{ij}
D_{ij}=rac{1}{2}\left( v_{j,i} + v_{i,j } ight)
v_{k,k} = 0
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set up model
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initialize model
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performs an iteration step of the penalty method. IterationDivergenceError is raised if pressure error cannot be reduced or max_iter is reached.
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Finalises the time step. dt is the currently used time step size. This function may be overwritten.
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step up pressure iteration if run within a time dependend problem extrapolation of pressure from previous time steps is used to get an initial guess (that needs some work!!!!!!!)
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iteration is terminateIterationd if relative pressure change is less then rel_tol
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