The film temperature is the boundary layer temperature between solid and fluid, see attachment pictures.
however I don't konw how to set up on goal?
you should probably go through the tech reference to review how flow simulation handles the boundary layer using the partial cell technology, or more generally how RANS handles boundary layer
i'm not sure what you are trying to achieve by applying a goal here but to get a graph similar to what is shown, an XY plot would be best.
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