[AndreP]

Hey guys.

I'm simulating the flow around a Formula One Halo. As I want to implement small scale Vortex Generators (50% of the Boundary Layer thickness), I need to know the Boundary Layer thickness before the separation occurs.

First I did the meshing and solving, I made sure the Y+ values were between 0 and 5 to ensure a good resolution and capture of the boundary layer. But now, I'm not too sure if there's a more "measurable" way of measuring the Boundary Layer thickness.

What I did was plotting the velocity vectors, zoom into the surface, adjusting the vectors size until I detected the flow separation. Then I went to the cell before, and used the Ruler to measure from the surface until the first vector that has the same size as the next. The result I got was 1.62mm which doesn't seem crazy but I was expecting a little bigger given I'm using 35m/s air flow around a cylinder shaped Halo! But I wanted to ask if there's any other more "scientific" way to measure the Boundary Layer.

Here's a picture of how I got the result!

https://imgur.com/Y6P8FhK