Learning Forum

[Chun-Wei Tsai]

Hello!

I am currently trying to build a model of a square fuel tank (will start from 2D if success will move to 3D), I am wondering what are the steps to build the model that can simulate a square fuel tank contains half jet fuel vapour and half jet fuel liquid in a freezing temperature (approximately -70 degree C). The result will be looking at the temperature profile over times. I am thinking about transient thermal in the workbench but not sure what are the general procedure.

Thank you very much!

[Nikhil Narale]

Hello, 

 

"contains half jet fuel vapour and half jet fuel liquid"

Can you please elaborate on this, perhaps by sharing some illustrations? 

 

I would recommend you to try this out in the Ansys Fluent. 

Check out this link: 

Chapter 20: Using the VOF Model (ansys.com)

Chapter 19: Modeling Evaporating Liquid Spray (ansys.com)

If you are not able to access the link, refer to this forum discussion: 

Thanks!

Nikhil

[SRP]

Hi,

In order to carry out the simulation, I advise using the multiphase model (VOF).

For more details about the multiphase, please refer to the theory guide: Chapter 14: Multiphase Flows (ansys.com)

Also, please refer to the user's guide: Chapter 22: Modeling Multiphase Flows (ansys.com)

Hope you find this useful

Thank you

[Chun-Wei Tsai]

Sorry if I didn't make the question clear enough, I am going to build a simple square model with fuel already inside. I want to place the model in a very cool condition (about -70 degree celcius) for a certain time, and I want to see the temperature contour plot and observe that how long does it take for the fuel inside the square tank to reach a certain temperature. 

Thank you very much!

[Rob]

OK, so the multiphase part of the examples is OK, you need to patch the fuel level. Note, you'll need a vent otherwise the whole system is going to get interesting unless the gas is compressible! Don't forget you'll need density to vary with temperature & turn gravity on if you want to see natural convection.