Computational Fluid Dynamics
The other aspect of the design process that uses truly enormous amounts of computing power is known as CFD, (Computational Fluid Dynamics). In a similar manor to the FEA process it relies on an accurate computer model of the analysed shape but this time the model is immersed into an electronic mesh of elements that are given fluid properties.
The fluid in this example is air, the solid is our bike at 400 mph.
This allows us to predict the resulting air pressure distribution on the surface of the bike, predicting its aerodynamic behaviour. One of the safety critical aspects of the bikes design is to ensure aerodynamic stability at speed.
And as in all excellent design activities it allows identification of both the good and bad aspects of any particular shape. Here for example identifying turbulence around the front tyre and wheel assembly.
The wind tunnel testing of old has now largely been superseded by CFD analysis.
Ability to make nice shapes
Key to all this though is the truth in the saying that If it looks good, it will go fast. No one wants to have his or her photo taken stood next to a melon at Bonneville.
Here are some design concepts that have been considered.
Conclusions
Remember the question at the beginning of all of this… having and using computers…. Does it help? Does it do what we want it to do? Is it any faster in producing a bike? And more to the point, will it result in a faster bike?
Well, I made my mind up at the start of the third page. Engineering to me is all about making things. The use of computers allows us to find out, understand, share and disseminate information. It enables us to make things happen.
But, I want to make the point that PCs are really tools to be used, and that the clever bit of computers is generally the person sat in front of them.
