Learning Forum

[sgpsaiz]

In Ansys Fluent 2024 R1, I'm performing a CFD of a hydrocyclone to try and obtain the pressure drop, but when I increase the velocity of the inlet to 1.6m/s and try to run the calculation, I get the following notification;

Error at host: floating point exception

Error: floating point exception

Error Object: ()

Error at Node 0: floating point exception

Error: floating point exception

Error Object: #f

I don't get this notification when I'm running the calculation with a lower velocity like 0.1m/s. It only happens when I increase the velocity. Please help, thank you.

[Federico]

Check your mesh quality.

If running transient, check the time step size, which may need to be reduced if increasing velocity.

[sgpsaiz]

I checked the mesh and reduced the time step size to 0.5s, but I'm still getting the same error.

[Federico]

how does a time step size of 0.5s compare to your mesh? Think of a Courant condition for stability V*dt/dx

[sgpsaiz]

I'm not running transient and I have checked the mesh quality and I'm still getting the same error.

[Federico]

What is the reported mesh quality?

[Federico]

Also, when does it fail?

Upon initialization? Or does it run for a bit before throwing this error?

[sgpsaiz]

It happens upon initialization.