Magnetostatics: Small Equation solver pivot term at AZ degree of freedom

- January 21, 2021 at 4:55 pm
  
  jayd
  Subscriber
  
  /COM,ANSYS RELEASE 2020 R2 BUILD 20.2 UP20200601 22:19:45nn *** WARNING *** CP = 0.578 TIME= 22:19:47n Element shape checking is currently inactive. Issue SHPP,ON or n SHPP,WARN to reactivate, if desired. nn *** ERROR *** CP = 1.656 TIME= 22:19:48n There is at least 1 small equation solver pivot term (e.g., at the AZ n degree of freedom of node 12321). Please check for an insufficiently n constrained model.nnI am trying to simulate a model in magnetostatics. I keep getting this error. Please help!n
- January 22, 2021 at 4:34 pm
  
  Bill Bulat
  Ansys Employee
  
  Make sure the entire modeled domain is a single part (i.e., it has shared topology on interfaces between separate bodies) so that the resulting mesh nodes on interfaces are used by elements on both sides of the interface. There is no bonded contact for edge flux (AZ DOF) formulated emag elements.nAnother thing is we typically make the external surface(s) of enclosures flux parallel (constrain AZ=0). This approximates the infinite extension of the surrounding domain beyond external boundaries.nnBest,nBilln
- January 23, 2021 at 5:01 pm
  
  jayd
  Subscriber
  
  I did make the enclosure a flux parallel. Also when i track down the node by id I get the node in the empty space (i.e. air) rather than on any body. Also I made the different parts of the model by slicing a single body. So is it possible for them to not have shared topologies?n

Viewing 2 reply threads

You must be logged in to reply to this topic.

Ansys Innovation Space

Boost Ansys Fluent Simulations with AWS

Computational Fluid Dynamics (CFD) helps engineers design products in which the flow of fluid components is a significant challenge. These different use cases often require large complex models to solve on a traditional workstation. Click here to join this event to learn how to leverage Ansys Fluids on the cloud, thanks to Ansys Gateway powered by AWS.

Earth Rescue – An Ansys Online Series

The climate crisis is here. But so is the human ingenuity to fight it. Earth Rescue reveals what visionary companies are doing today to engineer radical new ideas in the fight against climate change. Click here to watch the first episode.

Ansys Blog

Subscribe to the Ansys Blog to get great new content about the power of simulation delivered right to your email on a weekly basis. With content from Ansys experts, partners and customers you will learn about product development advances, thought leadership and trends and tips to better use Ansys tools. Sign up here.

Trending discussions