What is Frank, Oseen theory?

Frank and Oseen theory is like a special way to figure out how water moves around something, like when you stick your hand in a stream.

Imagine you're swimming in a river. When you move your arms, the water has to go around them, it’s kind of like the water is being pushed aside. Frank and Oseen theory helps scientists understand exactly how much water gets moved and what happens after that.

Think of water as a group of little friends who all want to keep moving in the same direction. When something, like your hand or a fish, comes into their path, they have to change direction, it’s like they’re being told to take a detour.

Frank and Oseen theory gives scientists a tool to calculate how much those water friends are being pushed around and what happens to them afterward, whether they swirl around the object or keep moving on.

It's like having a map that shows you exactly where the water will go when something blocks its way, helping us understand things like swimming, fishing, and even weather patterns!