So let me explain what's happening here. The velocity of water at the top edge of the triangle is critical velocity because critical velocity is that velocity upto which flow is stead. The velocity before the critical velocity is sub critical velocity (as the velocity of water is less and height/head is more) The velocity after the critical velocity is super critical velocity as the velocity is very high and head is very less in the downstream. Due to the change in flow conditions there is an abrupt rise in water where the ball is moving up. That condition is called hydraulic jump
Slow moving velocity at U/S let's just call it "Sub critical velocity" as potential energy from U/S to D/S changes into the Kinetic energy let's just call that increased velocity with low depth as "Super critical velocity" now as fast moving liquid meets again slow moving fluid the velocity gets obstructed and at the obstruction circular Eddies are formed which keeps the ball at the same position. (Ignore the transition of sub to critical or critical to supercritical which is the root of the hydrolic jump - this terms are too technical)
I believe the video title is wrong It should be super to sub Hydraulic jump is a consequence of transition from super to sub as the velocity decrease and the height increase to satisfy the continuity equation. The same as in compressible flow, the shock wave due to the transition from supersonic to subsonic flow
i still don't understand the word sub, super critical flow. what is factors that control it. for example, what is factor that control the ball to go left or right.
So let me explain what's happening here.
The velocity of water at the top edge of the triangle is critical velocity because critical velocity is that velocity upto which flow is stead.
The velocity before the critical velocity is sub critical velocity (as the velocity of water is less and height/head is more)
The velocity after the critical velocity is super critical velocity as the velocity is very high and head is very less in the downstream. Due to the change in flow conditions there is an abrupt rise in water where the ball is moving up. That condition is called hydraulic jump
manu thanks for this awsome explain😍😍😍❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤
Slow moving velocity at U/S let's just call it "Sub critical velocity" as potential energy from U/S to D/S changes into the Kinetic energy let's just call that increased velocity with low depth as "Super critical velocity" now as fast moving liquid meets again slow moving fluid the velocity gets obstructed and at the obstruction circular Eddies are formed which keeps the ball at the same position. (Ignore the transition of sub to critical or critical to supercritical which is the root of the hydrolic jump - this terms are too technical)
I believe the video title is wrong
It should be super to sub
Hydraulic jump is a consequence of transition from super to sub as the velocity decrease and the height increase to satisfy the continuity equation.
The same as in compressible flow, the shock wave due to the transition from supersonic to subsonic flow
Explain the video yrr
i still don't understand the word sub, super critical flow. what is factors that control it. for example, what is factor that control the ball to go left or right.
velocity and flow depth of flow.
Please explain this videool