Honda's OEM vortex generators ... on the Ridgeline pickup mirrors

[MetroMPG]

The boundary layer at that point (@ the back of any vehicle) would be thick enough that dimples wouldn't make any difference to the airflow.

[cfg83]

MetroMPG -

Originally Posted by cfg83

MetroMPG -

Yes, but I think they are more for noise reduction than aero-improvement. Also, you can *buy* these in auto stores in their carbon-bling section. I saw some stick-on ones at a Pep-Boys the other day. I will try to take a pic the next chance I get and post it.

CarloSW2

Here they are :



CarloSW2

[tasdrouille]

Originally Posted by MetroMPG

The boundary layer at that point (@ the back of any vehicle) would be thick enough that dimples wouldn't make any difference to the airflow.

What if you scale up the dimples?

Originally Posted by MetroMPG

"Dead stops" - what's that?

EDIT: regardless, golf ball dimpling doesn't apply to automotive aero for a number of reasons.

What would the other reasons be? I'm curious as to why it doesn't apply.

[DifferentPointofView]

Dead stops=things that stop abruptly. SVOboy basically described it. I was just wondering cause my hatch rounds off at the ends and I was thinking maybe if they caused the air to stick more to the vehicle it would minimize the wake, even just a little.

[MetroMPG]

Originally Posted by tasdrouille

What would the other reasons be? I'm curious as to why it doesn't apply.

The main reason: the dimples a golf ball work by tripping laminar boundary flow into turbulent boundary flow. The majority of the flow over a car's surface (except the very front - and only if it's well designed) is already turbulent.

http://www.aerospaceweb.org/question...cs/q0215.shtml

[Kaneda]

its really hard to hold any sort of "controlled" driving here in pittsburgh but ive noticed an increase in mpg after i applied a set to my A4. my particular set is from Welcome to Vortekz.com
and for $20 invested plus color matching to the car i couldn't be happier. im still gathering intel on completing the underbody of the A4, and i was looking to dimpling the surface to help w/ flow. ive seen it on some mercedes, and i think some lexus

[Oval_Overload]

[donee]

Hi OO,

We have had some good discusions on Ecomodder about this subject. My opinion is as applied on the Corbin Sparrow, is that the dimples need to be on the trailing edges where the cuve is very sharp. As is apparent on the fender of the picture you sent.

The only reason dimples are all over golf balls, is because the orientation of the ball cannot be controlled.

Do a search on tubulators too.

[eco_generator]

Originally Posted by MetroMPG

Aerospaceweb.org | Ask Us - Golf Ball Dimples & Drag

This website is awesome for airplane aerodynamics!

[cfg83]

Oval_Overload -

Thanks for that picture! I've seen one live before but I never noticed that detail.

CarloSW2