Moving Boundaries
 

Hello Fluent users: I have been trying to solve a case study in fluent involving moving walls but was not successful. Every time when i try to repeat the examples in the manual, i get the following error message after a few iterations.

"Negative cell volume detected"

Any thoughts to overcome this would be very helpful.

Re: Moving Boundaries
 

Hi, Try to reduce your time step!

Skd

boundary conditions
 

What are the sutible B.C for intake air flow through engines

Re: boundary conditions
 

fuel injection directly into chamber at 40 degree BTDC. which moel is for this problem

Re: boundary conditions
 

What are the sutible B.C for intake air flow through engines .(open inlet valve)

Re: Moving Boundaries
 

Hi guy,

I've got exactly the same problem than you. In fact you need to input a dynamic mesh. I wonder if we don't need any grid interfaces in more, I will let you know if I succeed.