5 ms·
I'm going to have to guess that CFD simulation above mach 1 that is good is probably not something that is publicly available but from reading RUAG's website th
by zarriak 7y ago
I'm going to have to guess that CFD simulation above mach 1 that is good is probably not something that is publicly available but from reading RUAG's website they use open source software[1]. From my experience with CFD in F1 the main issue you have with CFD is correlation but maybe driving a car around a track is harder to simulate than going really fast in "clean" air.
This reason is what leads me to think that it is a major issue and is why both China and the United States started going into mach 5+ with autonomous craft to gather data for correlation.
[1]: https://aerodynamics.ruag.com/en/aerodynamics/simulation-analysis https://aerodynamics.ruag.com/en/aerodynamics/simulation-ana...
- selestify 7y agoWhat is correlation?
- fhars 7y agohttps://en.m.wikipedia.org/wiki/Correlation_and_dependence https://en.m.wikipedia.org/wiki/Correlation_and_dependence
- knolan 7y agoFor low speed flows like in F1 the viscous effects are much larger and this can make flow prediction more difficult. It’s actually pretty easy to predict the shockwave pattern from 1D theory without the need for CFD [0]. The boundary layers are much thinner and you can assume inviscid flow at first. At hypersonic speeds the interactions get more complex however and you’re dealing with a lot more materials science challenges so CFD is important in predicting thermal loads and shock boundary layer interactions. [0] https://en.m.wikipedia.org/wiki/Oblique_shock https://en.m.wikipedia.org/wiki/Oblique_shock
- gripfx 7y agoThe CFD simulation in F1 isn't really a track simulation. Normally a straight or curved domain (for car in yaw) is used. Computational limits in the rules mean simulating dirty air, like when following a car, is incredibly inefficient.