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The theoretical basis for the numerical method, the boundary conditions and the moving grid extension are first discussed.
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The extension of the immersed-boundary forces from the moving grid to the fixed fluid grid and the restriction of the fluid velocities from the fixed fluid grid to the moving grid have been modified to be second-order accurate.
Given a favorite scheme for the solution on fixed grids of the discrete Navier Stokes equations, each of these two mathematical frameworks can generate multiple ALE extensions that share the same order of time-accuracy on moving grids.
Using the same NSCL, it is also proved that for the ALE extension of the second-order time-accurate trapezoidal rule, the DGCL requirement is a necessary as well as sufficient condition for nonlinear stability on moving grids.
Several examples are given, some of which include moving grids.
This permits very long time-steps on rapidly moving grids.
Grid extension by FEA.
Acceptance of grid extension for achieving 100% renewable energy supply.
Fig. 1 Analyzed conflict cases of German electricity grid extension Fig. 2 Grid extension conflict heterogeneous sets of strategic action fields Fig. 3 Relationships between challenger types.
FEA also implements a grid extension policy based on the internal rate of return (IRR).
The study of the analyzed cases displays the heterogeneous character of the protests against grid extension.
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Justyna Jupowicz-Kozak
CEO of Professional Science Editing for Scientists @ prosciediting.com