[svenki7]

Hi,
What is difference between flash evaporation and cavitation ?
can i apply cavitation model for flash evaporation ..?

Thanks in advance...

[Lionel]

Hello svenki7,

I see that this post is quite old, but I am wondering if you had any answer regarding your questions?
I think that the cavitation and flashing formation processes are the same ( vapor generation due to pressure drop), but the cavitation bubbles eventually collapses and come back to the liquid phase, while flashing is a complete phase change from liquid to gas.

did you try to apply the cavitation model to your flashing problem? did you get any results?

thank

lionel

[Amar Kad]

hi Lionel

yes it is possible to use Zwart Gurber cavitation model to simulate flashing using ANSYS FLUENT

[cwl6750084]

Originally Posted by Amar Kad

hi Lionel

yes it is possible to use Zwart Gurber cavitation model to simulate flashing using ANSYS FLUENT

I am wondering if anyone know any tutorials in using the cavitation model to simulate flashing in Fluent. Otherwise, how can I simulate the flashing process? I am trying to solve the attached problem (Figure 1), but the model crashes within a few time-step by using the default model setting. I have to increase the cavitation pressure as well as using the evaporation-condensation model simultaneously. However, doing so, the solution is incorrect (Figure 2). (The flow field (velocity, pressure, and temperature) is correct if I did not activate the multiphase model. But the velocity, pressure and temperature are all very weird once I turned on the multiphase model - I strongly suspect that I did not set the interfacial mass transfer correctly.

Thanks.