Ivar KJELBERG
                                                                                                                                                    COMSOL Multiphysics(r) fan, retired, former "Senior Expert" at CSEM SA (CH)
                                                         
                            
                         
                                                
    
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                                                Posted:
                            
                                1 decade ago                            
                            
                                14 apr 2013, 05:46 GMT-4                            
                        
                        
                                                    Hi
check your doc and the "wall" options, there should be a "moving  wall option in there ..
--
Good luck
Ivar                                                
                                                
                            Hi
check your doc and the "wall" options, there should be a "moving  wall option in there ..
--
Good luck
Ivar                        
                                                
                                                                                                            
                                             
                                            
                                                
    
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                                                Posted:
                            
                                1 decade ago                            
                            
                                14 apr 2013, 07:11 GMT-4                            
                        
                        
                                                    hey, 
Actually I needed the thickness of the film between the plates too as an output...so I was using the "Thin film Flow interface" to model the flow. So, I have 2 doubts...
Firstly,
Does one require a moving mesh interface to be coupled with Thin film for setting up the study??
Secondly,
How does one specify the velocity of the plates moving towards each other in the displacement field of the Thin film flow interface? I tried displacement =velocity * time but it didn;t quite work out for me....Could you suggest something in this regard?
Thanks :)                                                
                                                
                            hey, 
Actually I needed the thickness of the film between the plates too as an output...so I was using the "Thin film Flow interface" to model the flow. So, I have 2 doubts...
Firstly,
Does one require a moving mesh interface to be coupled with Thin film for setting up the study??
Secondly,
How does one specify the velocity of the plates moving towards each other in the displacement field of the Thin film flow interface? I tried displacement =velocity * time but it didn;t quite work out for me....Could you suggest something in this regard?
Thanks :)                        
                                                
                                                                                                            
                                             
                                            
                                                
    
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                                                Posted:
                            
                                1 decade ago                            
                            
                                16 apr 2013, 08:02 GMT-4                            
                        
                        
                                                    hey,
I tried building the model with the moving walls option. However, the pressure and velocity profiles are not changing with time in a time dependent study. Could you suggest if something is wrong with the model?
Thanks 
Sarneet                                                
                                                
                            hey,
I tried building the model with the moving walls option. However, the pressure and velocity profiles are not changing with time in a time dependent study. Could you suggest if something is wrong with the model?
Thanks 
Sarneet                        
                                                
                                                                                                            
                                             
                        
                        
                            
                                                                                        
                                Mikael Noerregaard Nielsen
                                                                                                                                                 
                            
                         
                                                
    
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                                                Posted:
                            
                                1 decade ago                            
                            
                                16 apr 2013, 13:56 GMT-4                            
                        
                        
                                                    Hey Sarneet
First of all, I am no expert on the subject but its very hard giving you advice without your model:-) The reason why I mention this is because it could be something in your boundary conditions or perhaps even inlet or outlet conditions.
Best of luck
Regards Mikael                                                
                                                
                            Hey Sarneet
First of all, I am no expert on the subject but its very hard giving you advice without your model:-) The reason why I mention this is because it could be something in your boundary conditions or perhaps even inlet or outlet conditions.
Best of luck
Regards Mikael