Yes, 3-D design is "modeling", especially in the computer sense, "simulating something". You're making a digital model of a physical object.
Years ago, back when "personal computers" were truly primitive, one of the model magazines had a sort column on a model railroader with no layout, or trains, or even a place for them. He had programmed one of those early computers to drive a replica CTC board for his favorite division, and was "operating" his railroad, just as a real dispatcher would. The computer provided "staging" at both ends, and he had to keep traffic moving on the modeled section. The programming controlled the trains, to make sure they behaved as the real trains would, to keep him working.