Learning Forum

[동수 서]

식기세척기 회전노즐 유동을 확인하려고합니다. 하지만 calculate단계에서 update dynamic mesh failed라고 뜨는데 해결방법이 있을까요?

 

Thanks to Google (Rob):

I am trying to check the flow of the dishwasher rotating nozzle. However, in 
the calculation step, update dynamic mesh failed is displayed. Is there a
 solution?

[Rob]

Assuming it's a "normal" dishwasher you should be able to use sliding mesh and not need dynamic mesh. That will be faster as you're updating the position of a cylindrical piece of mesh rather than needing to remesh a domain for every timestep. 

These will provide information on the rotating options (second part is sliding mesh)

https://courses.ansys.com/index.php/courses/vertical-axis-wind-turbine-part-1/

https://courses.ansys.com/index.php/courses/vertical-axis-wind-turbine-part-2/

[동수 서]

PartBodyAssyPrtREMOVE에 저 표시는 왜 생기는건가요?

[Rob]

You'd need two fluid zones. One for the bulk washer, and a second for the rotating arm & nozzle. 

The crossed tick means it's OK and something else was checked - look in the Ansys Meshing documentation. 

[동수 서]

 혹시 자세히 뭐가 문제인지 모르겠어서 제가한 파일을 보내고 싶은데 메일주소가 있을까요?

[Rob]

Staff are not permitted to open or download files, nor use direct email contact due to Export Rules. Please ask questions on here. 

[동수 서]

General - Transient

Model - k-e, Enhanced Wall Treatment

Inlet - Pressure inlet 75000pa

Dynamic Mesh - Smoothing, Remeshing, UDF 사용

Automatic Export 이용했지만 잘안됩니다..

[Rob]

Are you adding water? Is the mesh quality good? Have you watched the two courses I recommended? 

[동수 서]

자세히 안나와있어서 그런데 모델은 뭘로 써야하나요? 물은 추가 안합니다

[Rob]

The models may be OK, your problem is that you may want sliding mesh rather than deforming. Please post some images and review the training materials I linked. 

[동수 서]

모델링 할때 remove기능을 이용하여 하나의 파트로 만들었는데 이런 경우에도 가능한가요?

 

[동수 서]

보내준 링크에 메쉬과정이 생략되어있어서 헷갈리네요

 

[Rob]

Thanks for that. A picture makes things clearer, especially as I'm relying on Google to read Korean! 

You need to split a cylinder out around each rotating arm (I assume there are two). Those become the sliding mesh zones. It should be shown in the video, but not necessarily the meshing part: you need to review the sliding mesh options: so once you have three fluid zones (rotors & static zone) do NOT use Share Topology. 

Have a look for mixing tanks on here: it's a similar approach in that the mixer units rotate inside a tank.