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Topic	Can physics people explain knuckle ball to me?
AngelsNAirwav3s 03/25/21 12:14:50 AM #7:	The knuckle effect also occurs on totally smooth balls too, its not just the seams. Air usually flows around a ball in a smooth laminar flow, however once the ball reaches a certain speed with no spin the air flow becomes turbulent: violent/unpredictable flow. This causes the ball to have different air speeds flowing around the ball, make it move w/ a lift force. Knuckleballs in baseball are so crazy because they are affected by both phenomena. Dont think of it as the air grabbing the ball, the forces are much more like an airplane wing. Airflow is slower on one side of the ball than the other, causing air pressure to be lower on one side, causing a force to push the ball to that side, AKA Lift, just like a wing. --- Hello world! <cite>AngelsNAirwav3s posted [p:952086060] in Can physic... [t:79367252]...</cite> <quote>The knuckle effect also occurs on totally smooth balls too, its not just the seams. Air usually flows around a ball in a smooth laminar flow, however once the ball reaches a certain speed with no spin the air flow becomes turbulent: violent/unpredictable flow. This causes the ball to have different air speeds flowing around the ball, make it move w/ a lift force. Knuckleballs in baseball are so crazy because they are affected by both phenomena. Dont think of it as the air grabbing the ball, the forces are much more like an airplane wing. Airflow is slower on one side of the ball than the other, causing air pressure to be lower on one side, causing a force to push the ball to that side, AKA Lift, just like a wing. --- Hello world!</quote> ... Copied to Clipboard!
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