Fluid accelerates and decelerates over a convex surface due to changes in cross-sectional area, which affects flow velocity. When fluid encounters a convex surface, it accelerates to maintain flow rate as the area decreases, then decelerates as it passes the obstruction and the area increases. This behavior is closely related to the concept of flow attachment, where fluid adheres to surfaces to equilibrate pressure differences. Understanding these principles is crucial for analyzing fluid dynamics in various applications.
PREREQUISITESEngineers, fluid dynamics researchers, and students studying fluid mechanics will benefit from this discussion, particularly those interested in the behavior of fluids over varying surfaces.
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