Flowstead v3.1.2

Flowstead v3.1.2 (app version 3.1.2).

New example: instrument air with a saturator and the wet air receiver's PSV

• Help → Examples → "Instrument air: saturator and wet air receiver with its PSV". Dry compressed air (500 Nm³/h at 40 °C, 9 barg) is saturated with water in a mixer, with more water than it can hold. It settles in the wet air receiver V-100 (1.29 m × 1.84 m, vertical, 0.3 m of condensate), with wet air out at the top and condensate at the bottom.
• The example comes with PSV-100, set at 10 barg, and two scenarios: fire and blocked outlet. Open Safety and press Size: the fire boils the receiver's water (API 521 wetted fire, D102) and needs a 1D2 valve, the same as HYSYS. The blocked outlet relieves the whole feed, about 650 kg/h of wet air, and governs with a 1E2 valve.
• A two-phase separator now solves when free water forms. Its liquid outlet carries both liquids, as in HYSYS. Before, any separator that condensed water (a wet air receiver, a knock-out drum on wet gas) stopped with "connect another stream to the second liquid phase outlet". A three-phase separator still sends the water to its own outlet.
• Liquid densities no longer change at random from one solve to the next. The COSTALD rule for hydrocarbon liquids (3.0) could, at times, also be applied to free water calculated at the same moment on another thread. In example 4 the water came out at 994.2 or 990.6 kg/m³ depending on the run. It is now always 990.6.

Install: download flowstead-v3.1.2.apk on your Android phone (Android 8.0 or newer, 64-bit), open it and allow installing from this source.

Coming from a 0.x test build? Those were signed with the public debug key and this release is signed with the release key, so Android can't install it over them: export each project you want to keep (project menu → Export DWSIM file), uninstall the old app, install this one and import the files (Projects → Import DWSIM file). Data-sheet fields and line-sizing criteria are not part of a DWSIM file. Later releases install as updates.

Solves on the phone: DWSIM runs on the device (Settings → Engine → On this phone, the default); the first solve after starting the app takes a few seconds while DWSIM loads. A remote Flowstead engine (docs/engine-setup.md) is optional.

Release certificate SHA-256: d7883cfc24f1cb62db989086d69d217beed109b5b84164ff5394ad9e3e0bb921. flowstead-v3.1.2-mapping.txt de-obfuscates crash reports. Status and known limitations: docs/STATUS.md.

Commit: 049bb3c