erico2k2:
Tiny fluorescent particles, laser light used to study water flowing through tire grooves.
When a vehicle travels over a wet or flooded road, water builds up in front of the tire and generates a lift force. In a phenomenon known as hydroplaning, this force can become large enough to lift the vehicle off the ground.

In Physics of Fluids, by AIP Publishing, scientists from the CNRS, the University of Lyon, and The Michelin Group use a laser imaging technique to study water flow in front of and through tire grooves.

To counteract hydroplaning, tread designs are chosen to drain water from the front of the tire without decreasing its ability to adhere to the road. Very few quantitative experimental studies of the movement of water through tire grooves have been done, so little is known about the exact flow patterns in these situations.

The only previously published work reporting quantitative velocity measurements in tire grooves was done with a high-speed camera and used millet seeds as water tracers. The seeds are about 1.5 millimeters in diameter, though, and provide poor contrast, so velocity information inside the grooves was not usable for a flow analysis.

Currently, research into hydroplaning uses a test track equipped with a transparent window embedded in the ground. The area above is flooded and a tire rolling over the window is observed with a high-speed camera.

The investigators developed a more sophisticated approach involving fluorescent seeding particles to visualize the flow and used a sheet of laser light to illuminate the area. The fluorescent particles were only 35 microns in diameter, about half the thickness of a human hair, with a density close to water.

“The first remarkable feature of the flow inside grooves is the presence of white elongated filaments or columns,” said author Damien Cabut. “This indicates the presence of a gaseous phase, possibly air
https://scitechdaily.com/complex-fluid-dynamics-may-explain-hydroplaning-phenomenon/

erico2k2:
Its £25 and Its going to take like 10 days to order it

Bobxin:

Okay, gimme your contact, so that you can help me order it.

erico2k2:

Won't be able to collect it now as I'm due 9ja in hours, if it was like last week then yeah

Bobxin:

I don't understand, does it mean you cannot get it for me?

erico2k2:

Yes cos it might take 10 days to arrive at my house but Im due to fly to Nigeria in hours

Bobxin:

How can I get it?

erico2k2:

buy from Amazon or Ebay

Bobxin:


Hello sir, I want to discharge and fill my car with only Toyota coolant without adding water. Is it okay to fill only coolant in the radiator and reserve?

erico2k2:

Depends on what the tin says.some are ready mix while some you got to mox so read the instruction in the can plz.

erico2k2:

Have you read the instruction?

Bobxin:


Yes, after examining the one in the car, mechanics advised that there's nothing wrong with it, and I shouldn't change it.

erico2k2:
Its £25 and Its going to take like 10 days to order it

Searchingvictor:


Good evening boss, happy Sunday and was your day? Pardon me for this.
Please can you assist me #4000 to use till next week that salary will role in? Help please

Searchingvictor:


#4000 naira Sir

Searchingvictor:


Alright Boss. Not with the mind to borrow though. I'm just soliciting for help.

erico2k2:

I live abroad so can't do 4k sir
Besides I dnt borrow people money

111GlassCup:


You are lucky you didn't.
That's a scammer and troll

erico2k2:

yesoo, They are everywhere.

111GlassCup:


I think it's the level of poverty and unemployment in the country. Because it's hard to even buy any reasonable thing @ #4000 this period.
God is good sha

erico2k2:

I was talking to a friend of mine and he agreed, if you was earning N400k 3 years ago, and till ow you are now poor