test setup for fluid velosity.
test setup for fluid velosity.
Test Stuff still has some tasks left but it should be completed.
http://imgur.com/a/ZI3VT
this simplifies the calculations for this experiment, explaining how fluid speed influences a mechanical rotameter flow meter.
I will also illustrate this by connecting various sized tubes to the meter while keeping the same flow rate each time.
The calculations reveal that a rotameter built with 0.75" tubing is limited to fluid velocities between 4.6 and 40.9 centimeters per second, which correspond to flow rates from 0.8 to 7 liters per minute.
For 0.75" ID tubing at a system flow rate of 3 LPM, the velocity is 17.5 CPS, causing the flow indicator to stay at the bottom.
With 1.5" ID tubing at the same flow rate, the velocity rises to 4.3 CPS, preventing the indicator from moving.
At 0.375" ID tubing, the velocity reaches 70.1 CPS, pushing the indicator all the way to the top.
This demonstrates that meter size doesn’t affect readings, and the small black knob cannot compensate for incorrect tube sizing.
Check if the measurement matches 1.0 gpm for both pipe sizes as per the flow meter's registration.
The needle valve and tapered inlet port remain the key components, irrespective of the tubing size feeding the meter unless it's smaller than the tapered inlet. The float provides a reliable absolute measurement since it consistently reflects the actual flow rate, unlike an impeller-driven meter that must determine RPM versus diameter to assess flow. This ensures uniform accuracy because the tapered inner channel and inlet/outlet remain constant, allowing the float to display true flow values.
well that is not what my tests have shown so far,
what I have observed is that it performs exceptionally well in fixing the problem I introduced by piping the incorrect tube size into the meter at its midpoint of understanding. However, with the wrong tube size, accuracy declines as flow rates shift toward the top and bottom of the gauge.
If you're using D5's, their specified output diameter is 1/2"ID. When you feed this into a larger diameter tubing set, it generates more water volume than the rated head can handle. Rather than handling a narrow column of water only 1/2" wide, you're attempting to move a wider column—2 inches in width with a 1/2" diameter—making the process less efficient.
the original test didn't go well.
i began examining the flow rates as they were reported from top to bottom.
i'm running live tests on the system to check the actual flow rates, even adjusting the water weight for better precision.
as i approach the top and bottom of the meter, the reported flow rates decrease, which means my initial assumption was incorrect. the different tubing sizes don't impact the middle range much, but they do influence accuracy at the extremes.