Page 1 of 1

Air friction reduction - latest research on surface coatings?

Posted: 13. Sep 2021, 18:52
by Q2021
Hi all,

I wonder what is the state of the art technology for surface coatings that can make drastic reduction in air friction in maglev trains? What is the future potential of such research?

Thanks.

Re: Air friction reduction - latest research on surface coatings?

Posted: 6. Oct 2021, 00:42
by jok
Q2021 wrote:
13. Sep 2021, 18:52
Hi all,

I wonder what is the state of the art technology for surface coatings that can make drastic reduction in air friction in maglev trains? What is the future potential of such research?

Thanks.

The last piece of info that seemed convincing was to use a fine, rough surface like that found in sharks. The small eddies that arise on the skin of the shark in the water reduce the overall resistance in the water when moving quickly. All of this together with an elongated nose - like the Japanese maglev?
The shark idea is no longer new. But it is the last original idea from bionics that I became aware of.

Re: Air friction reduction - latest research on surface coatings?

Posted: 10. Oct 2021, 12:28
by Q2021
Thanks jok! If convenient, please share any references.

Re: Air friction reduction - latest research on surface coatings?

Posted: 10. Oct 2021, 17:43
by jok
Q2021 wrote:
10. Oct 2021, 12:28
Thanks jok! If convenient, please share any references.
Here is a general article about the Fraunhofer research group that has ben investigating the shark skin effect since about 2005.
https://www.zdnet.com/article/a-sharksk ... nd-blades/
Article from 2010, still to the point, I think....

Re: Air friction reduction - latest research on surface coatings?

Posted: 13. Oct 2021, 16:40
by Q2021
Thanks jok! Shall check further soon.