Ivar KJELBERG
                                                                                                                                                    COMSOL Multiphysics(r) fan, retired, former "Senior Expert" at CSEM SA (CH)
                                                         
                            
                         
                                                
    
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                                                Posted:
                            
                                1 decade ago                            
                            
                                1 févr. 2012, 15:31 UTC−5                            
                        
                        
                                                    Hi
I'm not sure aI catch you 100% for that question, but basically when I want to analyse my data I add internal boundaries, as these are easier to pick and to integrate over.
But the data set cut line, edge, surface ... allows you too to define a subset of your full results and COMSOL interpolates the values to map over the defined cut line, plane ... 
So both should work and give similar results.
Now what I do notflly catch is the STD of a variable over a cut line or plane, I'm missing sme independent variale, or is it the time value.
What you can do is to define a cut plane, integrate over the plane, eiter full plane or over several sub aprture, i.e. to get a flow local velocity, versus time and dump that into a table (vis dependent variables). Then you can add a RMS or STD from thereon the list, column by column (check the table operations)
--
Good luck
Ivar                                                
                                                
                            Hi
I'm not sure aI catch you 100% for that question, but basically when I want to analyse my data I add internal boundaries, as these are easier to pick and to integrate over.
But the data set cut line, edge, surface ... allows you too to define a subset of your full results and COMSOL interpolates the values to map over the defined cut line, plane ... 
So both should work and give similar results.
Now what I do notflly catch is the STD of a variable over a cut line or plane, I'm missing sme independent variale, or is it the time value.
What you can do is to define a cut plane, integrate over the plane, eiter full plane or over several sub aprture, i.e. to get a flow local velocity, versus time and dump that into a table (vis dependent variables). Then you can add a RMS or STD from thereon the list, column by column (check the table operations)
--
Good luck
Ivar                        
                                                
                                                                                                            
                                             
                        
                        
                                                
    
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                                                Posted:
                            
                                1 decade ago                            
                            
                                5 févr. 2012, 18:35 UTC−5                            
                        
                        
                                                    Hi Ivar,
I need to have several cut planes at different depths in my very narrow pipe but i am trying to define the plane with 3 points but the plane generated is not the one i am after but it is the bigger cylinder surrounding my narrow pipe.it is like i have generated it via quick option.
would you please let me know what i can do for that?
thanks                                                
                                                
                            Hi Ivar,
I need to have several cut planes at different depths in my very narrow pipe but i am trying to define the plane with 3 points but the plane generated is not the one i am after but it is the bigger cylinder surrounding my narrow pipe.it is like i have generated it via quick option.
would you please let me know what i can do for that?
thanks