Convergence issue on Gable roof
 

I am currently doing a simulation on drag of a gable roofed house for my thesis for validation I did a validation on Ahmed body I

• i have tried changing the urf factors it doesn't help much

got good results but for when doing simulation on a gable roof there is no convergence of the solution especially the continuity equation.

• The mesh orthogonal quality is .20 it doesn't increase but i have done more refinement on the edges so that the number of low quality of cell decreased

https://i.imgur.com/OCO2g5W.png
https://i.imgur.com/8xsjAy6.png
https://i.imgur.com/b1p7BD1.png