Ivar KJELBERG
                                                                                                                                                    COMSOL Multiphysics(r) fan, retired, former "Senior Expert" at CSEM SA (CH)
                                                         
                            
                         
                                                
    
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                                                Posted:
                            
                                1 decade ago                            
                            
                                2015/07/17 2:56 GMT-4                            
                        
                        
                                                    Hi
I'm not 100% sure I get this right, but are you aware that all 2D simulations are in fact 3D  models for which you define the depth Z (in the paper direction). 
For most physics this depth is normalised to 1[m] but if you enter absolute values for flux on the boundaries such as an absolute flow, through a 2D boundary = edge you need to define the section (Z depth) and that is what I suspect you are referring to. There might be different "depths" for different entities in your model too
--
Good luck
Ivar                                                
                                                
                            Hi
I'm not 100% sure I get this right, but are you aware that all 2D simulations are in fact 3D  models for which you define the depth Z (in the paper direction). 
For most physics this depth is normalised to 1[m] but if you enter absolute values for flux on the boundaries such as an absolute flow, through a 2D boundary = edge you need to define the section (Z depth) and that is what I suspect you are referring to. There might be different "depths" for different entities in your model too
--
Good luck
Ivar                        
                                                
                                                                                                            
                                             
                                            
                                                
    
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                                                Posted:
                            
                                1 decade ago                            
                            
                                2015/07/18 10:08 GMT-4                            
                        
                        
                                                    Hi,
Yes, it is what you says. When I am defining an inlet for a laminar flow, I need to enter the 'entrance thickness' for the inlet. So I am sure this time and thank you for your timely help!
Best regards,
Jun                                                
                                                
                            Hi,
Yes, it is what you says. When I am defining an inlet for a laminar flow, I need to enter the 'entrance thickness' for the inlet. So I am sure this time and thank you for your timely help!
Best regards,
Jun                        
                                                
                                                                                                            
                                             
                        
                        
                                                
    
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                                                Posted:
                            
                                1 decade ago                            
                            
                                2015/07/18 10:30 GMT-4                            
                        
                        
                                                    Hi, 
One more question. Since in 2D simulation, we need to define the entrance thickness for one specific plane, so is it supposed that the plane must be the base of 3D? Thanks.
Yours
Jun                                                
                                                
                            Hi, 
One more question. Since in 2D simulation, we need to define the entrance thickness for one specific plane, so is it supposed that the plane must be the base of 3D? Thanks.
Yours
Jun