Hi everyone
I am a littile in doubt about the action of air valve in two different case of AIR and WATER VAPOUR.
Does HAMMER treat these tow equally?
For example:
- When cavitation occures, does double air valve let the produced vapour leave the system? Can HAMMER find the mixture of air and vapour?
Any knowledge and information in this regard would be helpful for me.
Thanks.
Kind regards,
Hasan
Hello Hasan,
Are you asking this for academic curiosity or are you working on a real system where this is a concern?
Vapor and air pockets are tracked separately in HAMMER and do not interact. They each are assumed to exist at the exact point of formation (they cannot moved and interact). An air valve only introduces air pockets and limits the pressure from dropping to the vapor pressure limit at the air valve's exact location (pressure may become slightly negative at the air valve node but air inflow orifices sizes should be large enough to prevent the vapor pressure limit from being reached.)
See more here: Assumptions and limitations of tracking air or vapor pockets in HAMMER
Regards,
Jesse DringoliTechnical Support Manager, OpenFlowsBentley Communities Site AdministratorBentley Systems, Inc.
Answer Verified By: Hasan Meihami
Dear Jesse
Thanks for yuor help.
My question was more about HAMMER's behaviour in case of existance of vapor and air, than the explicit theory.
I will read the article du har mentioned.
Br,