[opticZ]

Greetings,
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As In above figures, I have six thin disks with different positions and orientations in fluent. Inside each disk there is a rotational symmetrical heating source, which is a function of the local coordinates.
In the expressions, if I use global coordinates, the expressions become too complex. So is there some solution for that, such as using a local coordinate
in the expressions? or something others.
I cannot find any references on the web.
Could anyone be nicely to give me some instructions.

regards,
ZHU