Learning Forum

[manelaero2020]

Hi friends

I am using fluent 2019 r2, the option 'prevent reverse flow' doesn't exist in this version.

My questions :

1- How to fix reverse flow using fluent 2019 r2?

2- I have read such solutions as refining mesh at the outlet/using coupled solver / extending the outlet furthermore (not possible for me) / and decreasing under relaxation factor

I have decreased under relaxation factor of pressure and momentum to 0.4 and of turbulence to 0.7

But I don't have an idea if this solution can affect solution accuracy; do you have an idea if this can affect solution accuracy please :)?

thank you a lot

all my kind regards

[Rob]

You identify why it's happening and work from there. The flag to prevent reverse flow shouldn't really be used without understanding the flow as you might be forcing a non-physical result.