paint job

Here are our CFD links and discussions about aerodynamics, suspension, driver safety and tyres. Please stick to F1 on this forum.
DaveKillens
DaveKillens
34
Joined: 20 Jan 2005, 04:02

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Last edited by DaveKillens on 02 Sep 2009, 13:56, edited 1 time in total.

CFDruss
CFDruss
0
Joined: 08 Sep 2003, 18:47
Location: Tamworth (nr Birmingham) UK

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One factor that has been discussed is laminar flow. That is what they did to the Hornet. When air passes over an object, part of the air has a tendency to "stick" to the surface.
Not so much "part" of the air sticks to the surface, in "all" the air/fluid at the surface is a stuck to the surface, this is general physics.
In the Hornet, they just drilled thousands of microscopic holes in a wing segment, and basically sucked the laminar flow off the surface of the wing. naturally, that portion of wing became more efficient.
There is no way of removing a boundary layer, you wilk get one no matter what you do. The method of hold drilled in to the surface, I believe, is not bl removal, but a method of energising the lower surface's boundary layer, by reverting some of the upper surfaces flow through hold drilled through points in the wing. This helps to ensure a delayed seperation of the lower surface (on a inverted wing). This is not used in F1 due to the scaling effects, and there are better methods for energising the boundary layer or preventing seperation
Russell Harrison
Forced Convection Design Engineer, Comair Rotron Europe Ltd
CFD is based around assumptions; the accuracy of the solution depends not only on the knowledge of the mathematics behind the software but the assumptions the user makes!!!

CFDruss
CFDruss
0
Joined: 08 Sep 2003, 18:47
Location: Tamworth (nr Birmingham) UK

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by the way, completely forgot to add, the paint used in F1 is no different to the paint used in everyday automotive application
Russell Harrison
Forced Convection Design Engineer, Comair Rotron Europe Ltd
CFD is based around assumptions; the accuracy of the solution depends not only on the knowledge of the mathematics behind the software but the assumptions the user makes!!!

Reca
Reca
93
Joined: 21 Dec 2003, 18:22
Location: Monza, Italy

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CFDRuss wrote: There is no way of removing a boundary layer, you wilk get one no matter what you do. The method of hold drilled in to the surface, I believe, is not bl removal, but a method of energising the lower surface's boundary layer, by reverting some of the upper surfaces flow through hold drilled through points in the wing.
He’s referring to the powered method of the b.l. suction, it doesn’t energize the b.l., it actually removes it, sometimes the whole b.l. (for example while studying the car’s underfloor flow in a wind tunnel without moving ground), most of times (when the aim is just to keep it laminar or to delay the separation) just the lower, weak, part of it is removed.
Obviously downstream the holes the boundary layer will build up again, but it’s a new b.l. and if necessary you could add a further row of holes to remove it again.

on
on
0
Joined: 02 Dec 2004, 17:36
Location: Czech republic

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Why dosn't shark efect aplicatin on raqcein cars?It's easy to say :befoure turbulent current it too dificul that we don't know as it functon comletly and clculation of this it's so dificul that can do only a Nasa ,haw somebodywrite on this chat.I sorryabout myEnglish gramatic.