[emred12]

Hi all,

I am trying to analyze NACA0015 in a steady state with the SST-K-omega turbulence model + SIMPLE method.

My problem is analysis does not converge the solution even after 4000 iterations. I think the number should be less than 1.5k. AoA is 0 degree.

Reynolds Number is 160.000 and velocity is about 16m/s. Chord length 190mm. Domain was created from the tail of the airfoil as shown in the attached image.

As I checked from the previous subjects, the general suggestion is to check the mesh quality. You can also find its details in the attachment. Ortoghonal quality is above 0.88. Y+ is arranged as about 1. There are about 15 cells under the boundary layer.

I tried to solve the problem with Couple method. However, for couple I am getting "Stabilizing pressure coupled to enhance linear solver robustness" warning. As I know it means that the program kindly asks me to change the solver method.

I am waiting for your guidance and suggestions. What may be wrong?

Thanks in advance.

[Tunahan Bayrakci]

https://www.youtube.com/embed/HPsBuqWH9FY
Hello Emre I recommend you to watch this video

[FMDenaro]

Originally Posted by emred12

Hi all,

I am trying to analyze NACA0015 in a steady state with the SST-K-omega turbulence model + SIMPLE method.

My problem is analysis does not converge the solution even after 4000 iterations. I think the number should be less than 1.5k. AoA is 0 degree.

Reynolds Number is 160.000 and velocity is about 16m/s. Chord length 190mm. Domain was created from the tail of the airfoil as shown in the attached image.

As I checked from the previous subjects, the general suggestion is to check the mesh quality. You can also find its details in the attachment. Ortoghonal quality is above 0.88. Y+ is arranged as about 1. There are about 15 cells under the boundary layer.

I tried to solve the problem with Couple method. However, for couple I am getting "Stabilizing pressure coupled to enhance linear solver robustness" warning. As I know it means that the program kindly asks me to change the solver method.

I am waiting for your guidance and suggestions. What may be wrong?

Thanks in advance.

Isn't too low the Re number to consider a fully developed turbulence?

[emred12]

I use "A Comparative Study on Turbulence Models for Simulation of Flow Past
NACA 0015 Airfoil Using OpenFOAM - Peerakit Kekina and Chakrit Suvanjumrat" as my reference for my study.

Even if there is no fully developed turbulence, why can I not observe the transition?