On 9/2/2011 1:06 PM, Evgenii Rudnyi wrote:
On 02.09.2011 20:29 meekerdb said the following:
On 9/2/2011 5:17 AM, Evgenii Rudnyi wrote:
I have summarized my answers in respect to that the simulation
technology falls short of the simulation hypothesis at
It could be considered as some small empiric case study.
My practical experience with simulation has often been disappointing.
It works best when abstracting out a relatively small number of
relations and simple physics. But on the other hand, what can be
simulated has vastly expanded over the 50yrs of my career. So when
this or that ambitious project fails I don't conclude that the trend
Modern simulation software is actually not that bad. If one keeps things simple, then
the chances to get the right answer for the first time are quite high even for a design
engineer. I mean that default settings and default meshing are working reasonably well.
This is one of the reasons that the simulation business grows extraordinary well: design
engineers can solve for example a linear structural mechanics problems by themselves,
the bachelor level suffices.
The problem in the real world however is not just simulate at any cost but rather to
earn money. The IBM case is interesting exactly from such a pragmatic viewpoint. If the
business does not bet anymore on monstrous supercomputers, then it is an interesting sign.
When I talk to engineers working on electromobility, I mention that theoretically one
could think of simulating the whole hybrid vehicle at once (structural mechanics, heat
transfer, CFD, electromagnetics in a single simulation) - they like it. Yet, they do not
bet on that, they are pragmatic.
Of course part of the reason they don't bet on that is that they understand the vehicle
pretty well and so they are confident that the CFD won't interact with the instrument
panel lights and the suspension won't interact in some unforseen way the the engine.
However, if they were designing a robotic rover to investigate the surface of Titan for
example then they would be much more interested more comprehensive simulations.
Just last year I wrote a heat transfer simulation for a vehicle and I got different
answers from the manufacturers simulation. It was because he had neglected the fact that
accelerations change the internal convective heat transfer.
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