It causes a reduction in cross-sectional area, so the velocity must be accelerated to keep up with the flow rate. It goes back to its original velocity once the obstruction is passed.KishoreAM said:why fluid accelerates and then decelerates when flowing over a convex surface
As the cross-sectional area increases aft of the "bump", the fluid wants to fill the new enlarged area, so it tends to follow the shape of the part it gets around. Of course, the faster the fluid goes, the harder it will be for it to follow the shape.KishoreAM said:also concept of flow attachment in simple terms
Flow over submerged bodies is the study of how fluids, such as water or air, behave when they encounter objects that are fully or partially submerged in them. This can include a wide range of objects, from ships and submarines to dams and underwater structures.
The flow over submerged bodies is influenced by several factors, including the shape and size of the body, the density and viscosity of the fluid, and the speed of the flow. Other factors such as turbulence, boundary layer effects, and surface roughness may also play a role.
Understanding flow over submerged bodies has many practical applications, such as designing more efficient ships and submarines, predicting the forces on underwater structures, and improving the performance of water turbines and propellers. It is also important for environmental studies, such as predicting the dispersion of pollutants in the ocean.
There are two main types of flow over submerged bodies: laminar and turbulent. Laminar flow is characterized by smooth, orderly motion of the fluid particles, while turbulent flow is chaotic and highly unpredictable. In most cases, the flow over submerged bodies is a combination of both laminar and turbulent flow.
Flow over submerged bodies is studied using experimental and computational methods. Experimental methods involve conducting physical experiments in laboratories or in the field, while computational methods use mathematical models and simulations to predict the behavior of fluids. Both methods play important roles in understanding and analyzing the flow over submerged bodies.