June 12, 2020 at 1:12 amMohamedKhaled1Subscriber
I am trying to mesh two pipes connected together (first pipe has an angle 50 degrees and second pipe has an angle 70 degrees) and have an inner shaft (pipe) with Eccentricity=50%. Fluid will flow between inner and outer pipe
I successfully build a structural mesh with this configuration (attached). But when i tried to change the inner pipe eccentricity to be 30% or concentric; i always got an error message "Multi zone blocking decomposition failed" . After many trials of trouble shooting, i found that the problem occurred when i split the inner wall into four equal division.
I mainly Split the face, outer and inner wall to make a good structural mesh and when i do not split the inner shaft, i got a very poor quality mesh.
Can anyone suggest how can i solve this problem
June 12, 2020 at 1:30 am
June 12, 2020 at 1:34 am
June 12, 2020 at 10:33 amRobAnsys Employee
Did you select hard sizing on those edges? If so set as soft and try again.
June 12, 2020 at 12:12 pmMohamedKhaled1Subscriber
Thanks for your reply
I tried soft and hard sizing. The best combination, i find to get this structural mesh with E=0.5 are:
1- Split the faces, inner and outer walls in four planes
2- Hard sizing on the edge of the outer pipe
3- Soft sizing on the radial division between two pipes
When ever i applied these procedures without split the inner wall into four planes (to avoid Multi zone blocking decomposition failed error occurred with Eccentricity less than 0.5); i got a very poor quality meshes (attached before)
June 12, 2020 at 3:03 pmRobAnsys Employee
You might want to look at whether you can use an unstructured mesh on the end faces so you have a more uniform cell size.
June 12, 2020 at 5:01 pmMohamedKhaled1Subscriber
Thanks i will try that
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