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Note: This discussion is about an older version of the COMSOL Multiphysics® software. The information provided may be out of date.

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Fuel tank simulation

Posted 2012年11月11日 GMT-5 17:48 Fluid & Heat, Computational Fluid Dynamics (CFD), Parameters, Variables, & Functions Version 4.2a, Version 4.3a 2 Replies

Ibrahim Dikmen
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Hi,

I have a project about fuel tank simulation. The thing that I try is similar to the sloshing tank example. However, since the fuel tanks are closed [ :) ] I need to limit the deforming mesh. Has anyone got any idea how to simulate a fuel tank?

So far I have put another rectangle on the existing rectangle and defined air for the properties. But program did not allow me to use the boundary between two rectangles. Thus, I could not define any thing for that boundary and the simulation crashed.

I need to put an upper boundary for the system to stop floating :)

2 Replies Last Post 2013年1月23日 GMT-5 09:24
Nagi Elabbasi Facebook Reality Labs
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Posted: 1 decade ago 2012年11月12日 GMT-5 08:21
There may be some modeling tricks that can help you limit the mesh motion. You can instead setup up the problem as a multiphase flow analysis.

Nagi Elabbasi
Veryst Engineering
There may be some modeling tricks that can help you limit the mesh motion. You can instead setup up the problem as a multiphase flow analysis. Nagi Elabbasi Veryst Engineering
Ibrahim Dikmen
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Posted: 1 decade ago 2013年1月23日 GMT-5 09:24
Hi again,

Regarding your suggestion, I have succesfully built a model by using the boiling water example. The fluid inside the domain behaves very well, however there exists a problem.

The thing is that the fluid volume decreases through the time. After a while, the whole tank becomes empty. I have learned that it is a result of non-conservative form.

However, selecting conservative form is not a solution for me :) Its solution time is very high that I could see the end of the simulations. And also the simulations never converge.

any idea?
Hi again, Regarding your suggestion, I have succesfully built a model by using the boiling water example. The fluid inside the domain behaves very well, however there exists a problem. The thing is that the fluid volume decreases through the time. After a while, the whole tank becomes empty. I have learned that it is a result of non-conservative form. However, selecting conservative form is not a solution for me :) Its solution time is very high that I could see the end of the simulations. And also the simulations never converge. any idea?

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