Natural Ventilation using Butterfly CFD

Hi ,
I’ve been trying to apply Butterfly to obtain air flow velocity values inside the model to study cross ventilation and natural wind flow inside the building model.

These were my inputs
1 2 3 4 5

At first i didn’t define a refinement region and got the following results
This result did not give me insight regarding the variation in wind flow inside the building

I got the following result after defining a refinement region. The run time was around 10 hrs
This result looks incorrect.

I am not able to identify were i went wrong

Please help

Thank You!

Hi - you should probably ask this question on the forum.