Imagine you are standing at one end of a pool, holding a stick on top of the water with both hands. If you move one hand up and the other hand down, the stick will bend into a curve. This is because the water in the pool is pushing against the stick in a sideways direction, which is called the "transverse" direction.
In the same way, when fluids (like gases or liquids) flow past an object, they create a force perpendicular to the direction of the flow, which is called the "transverse flow effect". This force can cause objects to bend or deflect, just like the stick in the pool.
This effect is important in many areas of science and engineering. For example, it can be used to design aerodynamic structures for airplanes and rockets that can withstand the strong sideways forces caused by air or rocket exhaust flowing past them. It can also be used in medical imaging techniques like magnetic resonance imaging (MRI), where an external magnetic field causes certain atoms in the body to align in a transverse direction, allowing them to be detected and visualized.