how to model thermal bubble inkjet?
 

HI everyone,
I want to model thermal bubble inkjet. i don't know how to heat the liquids and generate bubble. I have used the model: bubble and phase change,heat transfer, surface tension , viscosity and turbulence. In the boundary condition i use wall
->thermal information->power:5e8, but it doesn't work .Only a small region of liquid near the wall increase temperature and doesn't have any bubble or phase change. The liquid i use is water(CGS unit at 20C)
In the phase change, I input the data below:
saturation pressure:1e6
saturation temperature:373
latent heat of vapor:2.257e6
gamma:1.4
accomodation coefficient:0.1
vapor specific heat:6.67e6
exponent temperature:1.182e-4
superheat temperature:0

can somebody teach me how to set the accurate model to run thermal bubble inkjet simulation?

best reards
Tim

by the way, my edition is v9.3!

If the water is not warming up, I would suggest checking the thermal property coefficients of the water itself (Fluid 1): liquid specific heat CV1, liquid thermal conductivity CHV1. Also set heat transfer coefficient between wall and fluid HWALL1.

Dear JBurnham,
Thanks for your reply. I still have some questions.
(1)Do I need to creat a component as a wall or use the boundary condition setting"wall", what is the difference?
(2)"The heat transfer coefficient between wall and fluid " means the heat conduction coefficient of wall or fluid? Or does it have other meaning?
Thanks,
Best regards
Tim

You can use either a component or a wall-type boundary, it is up to you. The component may be easier to use. The component-to-fluid heat transfer coefficient is described in the User Manual in some detail, including the ways in which FLOW-3D picks a coefficient if one is not defined.