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[Newbie] Syntax for gradients in a rotated coordinate system ?

Posted Mar 1, 2017, 10:02 p.m. EST Geometry, Parameters, Variables, & Functions 0 Replies

Christian Wild
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Hi all,

I have a 2D model where x and y represent easting and northing, respectively. Let's say I simulate a variable w on this map, then I can calculate its spatial derivatives by wx and wy or d(w,x) and d(w,y).

Now I would like to rotate this map by an angle theta, so I define a Rotated System (sys2) under the Definitions tab. How can I calculate spatial derivatives in the rotated system ? I tried with wsys2.x1 or with d(w,sys2.x1) but neither worked...

Cheers,
Christian.
0 Replies Last Post Mar 1, 2017, 10:02 p.m. EST
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