What air speed are the simulations done at? I imagine a bonnet vent would have a more significant benefit at lower speeds and when stopped in traffic, so may be more useful on a road vehicle?

Im interested alot by how race cars pull heat out of the radiators. Nascar's next gen system is pretty cool and im sure other categories use it. Basically tho man I'd love to design my own intercooler configuration that surpasses the yobo standard I see with coyote falcons where they just plonk a heat exchanger in front of the radiator and condenser with no real ducting. Also those side exit vents must be why the EB2 v8supercar had its front end forcefully changed for EF spec. Better cooling and downforce which were more attributed to the vents than the dives planes by the looks of this ha

what program are you using?

Any chance you can get a model of the Aptera? I would love to see the results!

the engine bay vented? thats kinda sus

all i learned from this was aero is incredibly complex on cars and applying them with regard to proper vent placement would be so difficult

How about a Naca type duct in reverse on the belly pan? That should create a vacuum in the engine bay by using the laminar flow from under the car

Can you do the same analysis on a wagon?

Does Australia calls them hoods?

Might be good to use side vents back over the tire where the air has a time to normalize and the flow toward the rear of the car. Closer to the car door.

The side vents was very smart, also tilting the hood like on some fwd won't work with the pressure there, now I see why they call it rice.

Fantastic

Wonderfully interesting and well explained

The model reminds of the Pinderwagen Greatly shown and explained. Interesting results

what about the rear of the front wing, like an r34 gtr z tune, or out of the wheels?

Does the exhaust outlet have a lot of influence on aerodynamics? Does its position influence the gas output? Old nascars use the barrel at 45 degrees, modern ones are straighter in relation to the body.

Is cowl induction a good system? I've never seen a touring car with this system, only a few drag cars. When you show "average pressure", do higher numbers mean greater efficiency? or am I mistaken?

As someone who's been studying CFD at the highest level for the past 23 years, I can assure you you have absolutely no idea what you're talking about. This is just pure nonsense from start to finish.

I'm curious what the result would be of adding a gurney flap to the leading edge of vents.

I'm curious what the result would be of adding a gurney flap to the leading edge of vents.

its a model on a computer... but wow that last one is cooling and functional 😌

you talk like chef john from food wishes

ukposts.info/have/v-deo/p4qTp2adlniZzmw.htmlsi=9BtFZCIsbFxAQUzg build that in an you drive a another car

interresting......... but, that voice............

Lovw the video and the info. Have you thought about how hood venting affects something like the Stanceworks Ferrari? Huge bonnet vent for the rad but the engine is in the rear. Id love to see the airflow of a car like that

Hello, great video! I was wondering if you are able to CFD with the hood raised up at the back like a Cowl hood. I've installed hood risers on my 92 Honda Civic and found that crusing highway speeds (80km/h and over) my engine revs drops 500rpm from ~4500 to ~4000 rpm with just the hood risers. But the previous owner removed the undertray and AC block off panel (beside the radiator). With all this information, I've concluded that without those panels I'm getting a lot of drag and lift in the front and under the car. With the hood risers, I'm assuming it's going up and over the body completely and the corner edge of the hood is creating a vortex to cancel out drag from my mirrors. I also have Spoon "style" duck bill wing I would like to add but I'm unsure how it's going to react with the hood raised. I can take pictures, if you're interested. Thanks for the awesome video!!

A while back I saw that someone had run a simulation of a boat on a trailer, the form drag was pretty low for a trailer but it made a lot of induced drag.

A while back I read an article about this topic that pointed out that it was easy to put a hood vent in a position where air would actually be forced into the vent instead of coming out of it

Are your models based on any of the OpenFOAM examples? Which solver are you using? What tool do you use for mesh editing?

I note this is Open FOAM but what post processor did you use I like the way you made the car transparent to see the flow lines

Move the engine further back and duct the radiator inlet and outlet 🤓

Do you think spoilers make a difference on large SUVs?

Second vid of yours I've watched. Terrific content

Very cool how you took the time to break it all down with demonstrated models. Thanks for a cool vid

Interesting. Very surprising results without ducted flow to the vent. I imagined a vent in the low pressure zone near the leading edge of the hood would be a hungry little vacuum cleaner pulling huge volumes of air out. The WRC engineers have been ducting to their vents for decades. Now we see why.

Finally, a chad who knows about the JACCS accord

can you do some aero videos for sedan cars? especially late 80's/ early 90's cars which have a basic 3 box design

awesome vids! love the classic revisited... im so curious how ride heights and adjust the overall rake would of effective the manx

Great vid, I'll have to rewatch it a few times to understand it properly.

Wonderful presentation. I am revisiting it so I am unable to like it again. I think you have forgotten one change between the mp 4/2b and the mp 4/2c. I can remember an interview with John Barnard from years back where he says that it was possible to lower the driver seating position by 1-2 cm and this in combination with lower inlet manifold allowed the engine cover (area behind the driver head) to be slimmed down. Again if I remember correctly then he said that the shorter inlet trumpets and compacted was already on the original version of the TAG/Porsche engine but gave it an unsuitable engine characteristics. But a new fuel injection system with mass flow measurements had made the old compact system better in any way. Greetings from Denmark

thanks, this information matters

Educational. Thank you.

That image would be dope on a t-shirt.

So... Would you be able to look into the Classic Fiat 500 and the 595/696 Abarths? It was claimed that leaving the engine lid open would reduce drag and add down force. (I'm more interested in how I'd be able to improve cooling but hey, it's a mini Beetle so I'll just nick their homework. 😂)

what about the consept of clean seperation edges, I mean this car is kinda boxy so it comes kinda like that from factory, but if you have extended flaps from sides in a negative angle to give smaller wake area and better separation edge does this do anything

Why is there nothing under the car model? A lot of air will go in and under not over.