Improve mesh quality of the elements in the transitional zone between 2 region refinements

ttawandharong · June 9, 2021, 9:35am

Hi,

I have used Simscale for external flows simulations. I have noticed that mesh quality tends to be poor in the transitional zone between 2 region refinements with different element sizings (e.g. high aspect ratio). This usually leads to aphysical results in this zone. Is there a way to create smoother transition?

The picture below, I set 2 region refinements and you can easily see the bad elements situated on the boundary of each region, forming a box-like shape.

Boris

tsite · June 9, 2021, 10:51am

Hey Boris, could you also add the link to your project please?

Best regards,
Fillia

ttawandharong · June 9, 2021, 2:18pm

Hi Fillia,

here is the link

The model is Surge ver 1

The result is obviously unreasonable and does not converge

Boris

tsite · June 11, 2021, 9:37am

Hi there, this was not meshed with the Standard mesher, right?

ttawandharong · June 16, 2021, 3:21am

It’s a result of standard mesher with the active hex-core element option

tsite · June 30, 2021, 12:17pm

Hi there, in that case, I would recommend that you check the following page:

And there is this new advanced option on the main mesh tab so you can control the expansion ratio of neighboring cells globally:

Best regards,
Fillia