[MKuhn]

Dear all,

I would like to model the suction of water through a 5 m long vertical pipe, length in y-direction.


Model setup:

• vertical tube
• multiphase mixture model, primary phase water-liquid, secondary phase water-vapor
• gravity on (-y-direction), variable density method: mixture averaged
• operating pressure 0 Pa (because I define in the evaporation/condensation model the saturation temperature depending on the static pressure)
• pressure inlet 100,0000 Pa gauge pressure, water liquid
• setting the pressure outlet in this way that the liquid column will reach the middle of the tube 75,000 Pa
• initialize and patch the entire domain with water vapour
• the solution converges, fluent calculate a massflow according a pressure drop of 25,000 Pa, as if the gravity of the water does not exist.

What is going wrong here?
Moritz