I'm risking a question that might be "opinion based", but I hope it will not be seen as that.
This question is touched upon in the following questions:
However, they fail to answer what I'm asking here, even if some particular things are discussed, such as stating that the coefficients are a mixture of CFD, wind tunnel data and flight test data, or that gust loads can be modeled with Markov matrices. However, no flight model package or system is named that I could see.
For racing simulators, or car simulators, simulators that are accurate are sometimes referred to as Milliken & Pacejka or "Pacejka-like", depending on the particular implementation. This appears to be a reference model that many simulators are compared against. I'm not a tyre simulator expert, so forgive me if I just said something that is stupid.
What about flight simulation? The flight model part of the simulator, is there a "gold standard", that is typically used with most respectable simulators?
Flight simulator games often talk about the "flight model" and describe it as accurate. While I can easily imagine that this flight model is based on some simplification of Navier-stokes,
I have software background myself, and although I didn't write a flight simulator myself yet, I understand the need to simplify, and that no simulation will ever be 100% accurate. All models will inherently have various trade-offs and make some sort of sacrifices. However, that doesn't mean there isn't a relatively accepted way of performing such simulation.
I'm not asking for an opinion based answer, "this model is the best". I'm certainly not asking for a list of "the best" flight simulators. I'm curious what underlying flight model is used -- that said, I wouldn't mind one or two examples of "this famous model described in the following academic paper, is used in flight simulator X and Y".
Basically, I'm simply curious if, in the industry, a typical model or small set (a couple) of models are considered either the actual "gold standard" or more of a de facto standard.
If there is no such thing, that pretty much every flight simulator does it differently, then I'll accept that as an answer. If there is a small set of terms that everyone in the industry is familiar with, I'd love to know then. It would let me easily search up papers that describe these systems.
I'll also accept an answer that lists an overview paper on the challenges of accurate flight simulation on modern computer systems.