crycry Posted January 15, 2017 Report Share Posted January 15, 2017 I did a practical on radial hydraulic jumps and I need to explain the theory behind it. I know how to calculate the pressure using pressure=phg formula but I don't know how to relate the water pressure and the velocity of water. I searched for some equations but they are way to complicated and I don't understand which one to use since they seem irrelevant to my situation. Could you please tell me an equation that simply relates the water pressure and its velocity? Also mention what each variable in the equation refers to. Thanks Reply Link to post Share on other sites More sharing options...
SC2Player Posted January 15, 2017 Report Share Posted January 15, 2017 Have you looked at Bernoulli's equation for fluid dynamics? It provides a relationship between pressure and velocity (amongst a few other variables), and is currently in the engineering option. 1 Reply Link to post Share on other sites More sharing options...
crycry Posted January 15, 2017 Author Report Share Posted January 15, 2017 2 hours ago, SC2Player said: Have you looked at Bernoulli's equation for fluid dynamics? It provides a relationship between pressure and velocity (amongst a few other variables), and is currently in the engineering option. Yeah, I also looked at that equation, but I don't know how to use that equation when I only know the pressure, height, density, and gravitational field strength. I currently don't know the velocity and what that "constant" is. Is there a way to work around this? I'm desperate for help!! Reply Link to post Share on other sites More sharing options...
SC2Player Posted January 15, 2017 Report Share Posted January 15, 2017 Check out this link http://hyperphysics.phy-astr.gsu.edu/hbase/pber.html It provides an alternative definition for the Bernoulli equation, although you'd need to know both initial and final equations. There's also the continuity equation, although yet again you'd need to know both initial and final values. If you don't know both the initial or final velocity of the water, I'm afraid I can't help much. 1 Reply Link to post Share on other sites More sharing options...
crycry Posted January 16, 2017 Author Report Share Posted January 16, 2017 17 hours ago, SC2Player said: Check out this link http://hyperphysics.phy-astr.gsu.edu/hbase/pber.html It provides an alternative definition for the Bernoulli equation, although you'd need to know both initial and final equations. There's also the continuity equation, although yet again you'd need to know both initial and final values. If you don't know both the initial or final velocity of the water, I'm afraid I can't help much. Thank you very much for helping me. That website actually helped me to understand the concept! In addition to the website, I found this useful pages in one of the physics textbooks my teacher had. Reply Link to post Share on other sites More sharing options...
SC2Player Posted January 16, 2017 Report Share Posted January 16, 2017 Glad to be of service. I think I actually have the same physics textbook - it looks like Introduction to Physics by Cutnell and Johnson. It's a pretty helpful one (has more depth than the Oxford textbook, and is also significantly more rigorous). 1 Reply Link to post Share on other sites More sharing options...
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