What's New
Updated to IOS 15.
App Description
Restrict-Ori calculates gas and liquid restriction orifice sizes and flowrates based on R. W. Miller's "Flow Measurement Engineering Handbook".
For gases this means that sonic velocity (critical flow) exists at the orifice throat, and further decrease in the downstream pressure will not increase the mass flow rate.
For liquids, choked flow occurs when the orifice decreases the downstream pressure to below the liquid vapor pressure, at that point the liquid will partially flash into bubbles of vapor. If vapor pressure is less than downstream pressure (non-choked flow), the pressure drop is calculated based on empirical equations used for control valves.
iPhone Screenshots
(click to enlarge)
iPad Screenshots
(click to enlarge)
App Changes
- April 21, 2018 Initial release
- June 15, 2019 New version 2.0
- August 06, 2021 New version 3.1
- August 06, 2021 Price decrease: $7.99 -> $6.99
- September 16, 2023 New version 3.2
Other Apps From Bjarne Berge
