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Level set values for a cartesian grid

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Old   March 10, 2011, 21:44
Default Level set values for a cartesian grid
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Can please someone tell me how to compute the level set values for a rectangular domain containing a circle as obstacle inside. The grid is cartesian and I would just like to compute the value of PHI for all points of the domain: I mean there should be negative values for the fluid region, positive for the solid region and zero values for the boundaries.
I haven't found any useful book or article on this topic which is very wide spread...
Thanks for your help.
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