Robert Koslover
                                                                                                                                                    Certified Consultant
                                                         
                            
                         
                                                
    
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                                                Posted:
                            
                                2 years ago                            
                            
                                21.06.2023, 13:23 GMT-4                            
                        
                        Updated:
                            
                                2 years ago                            
                            
                                21.06.2023, 13:23 GMT-4                            
                        
                        
                                                    This is an elegant model, but you do have a problem with it.  It appears that the problematic region is the two wires (coil 9 and coil 19) that start and end on the same surface, rather than cross through the cylinder from one side to the other.  I strongly encourage you to focus your attention and thinking on how your detailed choices of boundary conditions work (or in this case, fail) for those specific two wires.  You may need to do a more detailed specification of the boundary conditions, to account for those two special-case wires.
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    Scientific Applications & Research Associates (SARA) Inc.
www.comsol.com/partners-consultants/certified-consultants/sara                                                 
                                                
                            This is an elegant model, but you do have a problem with it.  It *appears* that the problematic region is the two wires (coil 9 and coil 19) that start and end *on the same surface*, rather than cross through the cylinder from one side to the other.  I strongly encourage you to focus your attention and thinking on how your detailed choices of boundary conditions work (or in this case, fail) for those specific two wires.  You may need to do a more detailed specification of the boundary conditions, to account for those two special-case wires.                        
                                                
                                                                                                            
                                             
                        
                        
                                                
    
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                                                Posted:
                            
                                2 years ago                            
                            
                                23.06.2023, 09:28 GMT-4                            
                        
                        Updated:
                            
                                2 years ago                            
                            
                                23.06.2023, 22:14 GMT-4                            
                        
                        
                                                    Thank you for your suggestion. I don't know what the principle of the coil geometry analysis is, and perhaps this is where the problem lies? In the Opera3D software, there are models for 8-node conductors and 20-node conductors. I don't know what the corresponding models are in Comsol.
                                                 
                                                
                            Thank you for your suggestion. I don't know what the principle of the coil geometry analysis is, and perhaps this is where the problem lies? In the Opera3D software, there are models for 8-node conductors and 20-node conductors. I don't know what the corresponding models are in Comsol.