[Disclosure: I was attending last night's Science Cafe in my role as Manager of Science City Bristol.]

At last night’s Science Cafe, a broad group of Bristolians heard about CFD, Pitch drips, carbon footprint of cows, and road spray from lorries; all from a talk about a 1,000mph rocket car!

Pitch drop experiment on Wikipedia

Computational Fluid Dynamics is the particular research discipline of Dr Clare Wood and Dr Ben Evans from Cardiff University. Clare began with a basic introduction to CFD, some of the history of the Navier-Stokes equations and the other uses they get put to. This was where the Pitch Drop came in; an experiment started in 1930 to measure the viscosity of pitch (which looks like a solid), there have been 8 drips of pitch since then as it very slowly flows into the catching beaker. Unfortunately, no one has ever witnessed a pitch-drip, there was a technical hiccup with the video feed [requires Windows Media Player] on the last drop (28 November, 2000). Clare also talked about ‘proper’ science and using CFD to model blood flow in hearts and the bio-medical applications.

Ben then picked up the topic and began talking about the pressure waves that develop as you move from sub-sonic through to super-sonic. A major challenge is the incredible pressure that will occur around the rear wheels as the third shock wave develops. This is potentially so strong it could physically lift the back-end of the car into the air, obviously a bad thing at 1,000mph!

There’s a limit to what can be done with the mini-winglets that are being used to trim the car aerodynamically, so Ben and the CFD team are leading the engineering design changes to the rear suspension & underside to try and reduce these pressure waves to make the car safe to drive. There was some more about the research development of new CFD algorithms and the promo-video (embedded at the end of this post).

After a short break, the Q&A began. The first question was about the environmental impact of a 1,000mph rocket car with follow up comments about the 19th Century’ness of a fast car. Although this wasn’t Ben’s area of specific expertise its obviously something that comes up fairly regularly. An environmental economist (or something like that) has looked at the car, the project and worked out their carbon footprint for the whole 4 year project. Apparently it comes to around 4 cows farting for a year; now I’d never entered the term “cow fart” into Google before this morning (who would) but it seems quite a research topic, even the Telegraph are reporting it!

As to the choice of a rocket car (rather than a green car); this had been intended from the outset to be an engineering adventure. The car & the 1,000mpt target are almost incidental, the primary aim is to get children (and the young at heart) excited about science & engineering and thinking about careers in the sciences. Rockets are still exciting to young kids!

The topics moved around and one that came up was the legacy of the project, what will we have after the final run (other than a very expensive museum exhibit)? Ben explained that much of the research involved in the CFD modelling is directly transferable. The example he used was how spray is formed at the back of lorries in the rain. One of the challenges of Bloodhound is the generation of a dust spray from the wheels and shock wave, and modelling how this mix of air & particles grows and affects the car. The same physics are (they think) involved in road spray from lorries, but no one has developed a good model of how spray forms and moves around the lorry. When you drive into this spray, in overtaking for example, it can be a real safety hazard, by modelling this and proposing different designs for the lorries, they might be able to reduce this spray and improve road safety.

There were tons of other questions (about an hour’s worth), it was a really great evening. Thanks to John and At-Bristol for hosting and to Bob Foster for his Science Cafe website where I found out about the event from Bob’s Calendar.

Andrew McConnochie, 30 March 2008

To a packed (and hot) Rosalind Franklin room in At-Bristol, Chris Anderson (Editor of Wire, Author of Long Tail & now Free) gave a really good overview of the premise of the “Free” economy, Fremium, marginal costs and the impact of Moore’s Law on abundance & scarcity.  That was for around 25mins, he then answered Q&A for another 30 min before retiring to sign copies of his (not free) book.

I was lucky enough to ask a question which went loosely around, in this new economy of free, what is the value of geography (Hollywood, Silicon Valley, Beijing, Bristol)? Chris answered partly by describing two companies he’s just launched. For one the CTO came from MIT, for the other the CTO was online and after 6 months Chris discovered that he was a High School drop out with a self-taught knowledge of Arduino in Tijuana. Chris also talked a bit about choosing to live in a place and then finding the best talent for solving a problem, which probably isn’t in your company, City or probably even country.

On stage and in the couple minutes he spent outlining his answer, this made a degree of sense but something wasn’t quite right, and it was only on the walk home that I worked through some thoughts; hence this post (it goes on a bit, sorry).

Whilst the human brain is an undoubted marvel of flexibility and adaptability, in evolutionary terms its design is around 5,800 years old. The last major version change was about 1.5 million years ago when it tripled in size, and the last genetic upgrades were around 37,000 years ago and 5,800 years ago. However, given that the internet isn’t 50 years old yet (and probably under 30), it’s a wonder that our heads don’t just explode trying to cope.

As an aside, I’ve worked for the last few years with a company in Toronto and for a while helping them build a partnership with an organisation in Vancouver; headshifting across 8 time zones is disproportionately harder than just working a 20-hour day. Even funnier is what happens when you try to physically do what the internet allows virtually and travel around the world in 23 hours, as Jeremy Clarkson found out (with a slight cheat on the international dateline – YouTube from 8:05 onwards in particular.

The point is that we’ve evolved to be local, social creatures (see the Dunbar number) and it’s only by a design fluke that we can even begin to cope with the internet. Which brings me back to geography by way of Seth Godin, we like to be in a tribe of similar people. Of course tribes can be online but fundamentally we like to meet people in real life. Its no coincidence that most digital start-ups are around the Silicon Valley area; that’s where all the other digital start-ups are. If you want to be in movies you go to Hollywood; if you want to be in finance you go to London, etc. Of course there are thriving start-up, film and finance industries outside those locations <plug>not least Bristol which has been recognised as one of the most innovative cities globally by McKinsey & the World Economic Forum, over a quarter of the global wildlife film making originate out of Bristol and the finance sector is the largest in the UK outside London</plug>.

And perhaps that’s the value of local. You can build trusted relationships with all the key partners to build a successful business and still compete globally on the ideas & products that are generated.

In my new part-time role as Manager of Science City Bristol, I was talking this morning with Martin Coulthard about the developments of the Bristol Enterprise Network over the next few months. He was making the valid point that Science City Bristol doesn’t have a ‘neat’ strapline or twitter pitch. But I’m not sure it needs one. To get back to Chris again, in the world of free and virtually frictionless transactions, we need to find the added value of being in the Bristol / Bath city region and being into science. That might be (probably is) different for each of the many tribes in and around the area.

For a bit of fun I tried “what is a science city” as a search term; WolframAlpha was completely stumped, Google found most of the UK Science Cities but didn’t really provide an answer, and Bing didn’t really do much better. I can’t promise to develop a complete answer myself, but I do think there is some great added value to be delivered.

Thanks to Andrew Kelly for running this as part of the ongoing Festival of Ideas.

[Clarification: I booked and paid for this Festival of Ideas's talk as Managing Partner of jbsh LLP, before discussions about being the Manager of Science City Bristol; I just happened to ask a question about geography in the new economy. These are my thoughts on Chris' response.]