You seem to be apply a heat generation rate where it would seem to be more typical to apply a surface heat flux. With a heat generation rate the size of the element will determine how much heat you are applying. The volume of the elements in the mesh you show will result in a big variation in the amount of heat. The geometry calculations you do in the *do loop seem too simple to apply to heat load moving over the surface of the gear teeth. Could you explain how they are supposed to work? If the laser is moving circumferentially at a constant rate along the surface as it goes up and down the gear teeth?
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