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calculating Normal vector in level set method

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Old   May 12, 2009, 03:38
Default calculating Normal vector in level set method
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If anybody knows level set method help me.
I want to calculate Normal vector (gradient phi)/[gradient phi] in level set method. what kind of discretization should I use? (central differencing or other) .
which one?

Thank you
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Old   July 21, 2009, 07:25
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You have an example of how to calculate the normal vector in the file interfaceProperties.C in which the normal vector is defined in the line:

nHatf_ = nHatfv & Sf;
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