6 Replies Latest reply on Jul 1, 2014 8:47 PM by Jared Conway

Flow of Fluid within the Same Fluid

Wei Siong Low Jun 26, 2014 8:03 AM

I want to know if what I am doing is correct?

I would like to simulate a stream of water coming into a Tank which is already "Filled" up with the same kind of Fluid. (in my case here is Water)

What I imagine flow simulation to be doing normally is that:-

The stream of water simulated, is coming into an Empty Tank.

What I believe which (I could be totally wrong here) is:-

The stream of water would act different should there already be Water pre-filled inside the Tank.

To emulate this, do i create a Fluid Subdomain of the same Fluid inside of a Computational Domain and simply run the analysis? Or is there an option whereby i can suggest that the Computational Domain is already filled with water??

Re: Flow of Fluid within the Same Fluid

Travis Storm Jun 26, 2014 3:34 PM (in response to Wei Siong Low)

Never done this... but I would imagine you could put a surface on the top of the liquid dividing the liquid and air and insert a fluid subdomain for whichever fluid isn't your default. Make sure you deselect the surface between the air and the fluid from the component control though so it doesn't interpret it as a wall.
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Re: Flow of Fluid within the Same Fluid

Jared Conway Jun 26, 2014 11:31 PM (in response to Wei Siong Low)

so filling an empty tank > can't be done in flow simulation
looking at mixing starting with a full tank > could be done. 2 things you need. 1. make a copy of water as your second fluid. that way you can look at water 1 mixing with water 2. 2. you will need an outlet. you can't just put liquid in without letting it out.
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- Re: Flow of Fluid within the Same Fluid
  
  Wei Siong Low Jun 27, 2014 5:41 AM (in response to Jared Conway)
  
  Hie Jared,
  
  Thanks for the response, I think you are kind of on the same track as what I am getting at.
  
  However, I am not sure if I understand how I can go about doing item #1. (i.e making a copy of water as my second fluid)
  
  What I was doing to create a Fluid Subdomain, is that on the right path?
  
  Maybe this Image will help?
  
  #2 I do have an outlet so no issues.
  
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  - Re: Flow of Fluid within the Same Fluid
    
    Jared Conway Jun 28, 2014 2:06 AM (in response to Wei Siong Low)
    
    Create a copy in the eng database
    
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    - Re: Flow of Fluid within the Same Fluid
      
      Wei Siong Low Jun 30, 2014 3:10 AM (in response to Jared Conway)
      
      hmmmm.. i'm really sorry Jared but I still do not get how that would solve my issue of having two fluids merging into one another within the same "vessel"
      
      you will have to excuse my very basic knowledge of Flow Simulation.
      
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      - Re: Flow of Fluid within the Same Fluid
        
        Jared Conway Jul 1, 2014 8:47 PM (in response to Wei Siong Low)
        
        where are you stuck?
        
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