2D airflow over car

ApuME · December 14, 2016, 15:32

Hello everyone, I'm doing a basic simulation of airflow over a passenger car in Ansys.

I'm trying to create some sort of visualization to show how airflow is affected by adding a rear roof wing of a car traveling 60 mph (roughly 27m/s)

My theory is that it will slightly help to reduce drag at the cost of downforce.

/insert thats not how this works meme

/insert I have no idea what I'm doing meme

I'm going to include my workbench files

Does anyone have any tips for modeling this better?
-Should I draw the entire car?
-Should I run multiple tests at different speeds?

lejonetfrannorden · August 9, 2018, 09:02

Hello ApuME,

Since you want to simulate a passengar car, I would suggest checking out Ahmad body first. However, I think that added wing will increase drag in 3D even if does not increase in 2D. This is due to vortices generated at the wingtips and (negligibly) increased surface area.

December 14, 2016, 15:32	2D airflow over car	#1
ApuME New Member Apu Parmar Join Date: Sep 2016 Posts: 2 Rep Power: 0	Hello everyone, I'm doing a basic simulation of airflow over a passenger car in Ansys. I'm trying to create some sort of visualization to show how airflow is affected by adding a rear roof wing of a car traveling 60 mph (roughly 27m/s) My theory is that it will slightly help to reduce drag at the cost of downforce. /insert thats not how this works meme /insert I have no idea what I'm doing meme I'm going to include my workbench files Does anyone have any tips for modeling this better? -Should I draw the entire car? -Should I run multiple tests at different speeds?

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August 9, 2018, 09:02		#2
lejonetfrannorden New Member Join Date: May 2018 Posts: 19 Rep Power: 7	Hello ApuME, Since you want to simulate a passengar car, I would suggest checking out Ahmad body first. However, I think that added wing will increase drag in 3D even if does not increase in 2D. This is due to vortices generated at the wingtips and (negligibly) increased surface area.