Learning Forum

[dinatasya12]

[Rob]

Are you running transient, what models are you using and what are the initial conditions?
Please put the work that got censored in using s p a c e s between the letters so I can fix the Nanny. It's overly zealous for technical terms.

[dinatasya12]

yes, transient . I'm using Eulerian for Boiling model
saturation temp at 373.15 degree celcius
initital condition at 25 degree celcius
so actually I want transient simulation of boiling water inside the tube. when the temperature increase until reach 100 degree celcius the water-liquid should be boilling and changing phase to vapor, so the vapor move out of the tube. thank you so much for your kindly attention sir. please check my setting simulation below

[Rob]

Calculate the inlet velocity, and compare that to the cell size: how long will it take the flow to cross a cell. Where's the heat coming from? Side walls are adiabatic?

[dinatasya12]

ther heat coming from below tube = 150 degree celcius, type mass-flow-inlet
yes, the walls are adiabatic heat flux zero
I want to ask about my setting boundary condition, is it correct or no ? should I change the boundary condition ? should I change the multiphase model ?

[Rob]

You're adding water at 50C above it's boiling point? I suspect it's trying to boil VERY quickly, so either drop the time step a lot or rethink the set up. I'd advise the latter.

[dinatasya12]

do you have any advice ?
thank you for your kindly attention sir

[Rob]

Yes, read my previous post.