Recent content by sph99

Thanks Q_Goest, but my calculations are not agreeing with my experiments. The calcs are give me less than a second, the experiment giving me 5 seconds. I am happy that the flow rate is accurate. I think this is due to the long length of very small diameter tube. The length of the tube is 160mm...

Thanks! I also need to work out deflation time but that's just the same thing in reverse. I have to also work out the inflation time at 1800kPa. The balloon will stretch in this case. How would I go about that? It is a safety check that we must do. Thanks again

No, the balloon is moulded into shape before use and will not stretch at 600 kPa

Yes, 6 atm or 90 psi is a fairly standard inflation pressure for coronary catheter balloons.

that will only work for atmospheric pressure. I want to determine the time to reach a higher pressure (600kPa). how do I find mass at a certain pressure?

Q_Goest, thanks for your reply. I should have pointed out that this balloon is filled using water or saline and not air. Am I correct in saying that I cannot then use the ideal gas laws? I have looked at Bernoulli but I don't know how to apply this when one end of the system is closed. Also it...

Hi everyone I have a problem whereby I need to calculate the time to fill and then deflate a catheter balloon. This consists of a hand pump connected to a long tube which then widens out to the balloon vessel. I need to reach a certain pressure in the balloon. The balloon is already expanded...