3 Replies Latest reply on Jun 29, 2014 4:55 PM by Jared Conway

Simulation of Double Perforated Plate

Nuno Moita Jun 28, 2014 8:47 AM

Hello Flow Simulation Community,

Does anyone have done or know how to proceed to use Flow Simulation to solve a double layer perforated plate? See the image below.

The perforated plate as 2 mm holes covering 40 % of the total area. The double layer is separated 150 mm (air between them). The internal box it is wood and inside will be a source of power. I want to know if there is a simplified way to simulate this. The heat will flow from inside of the wood box (box in the center of the image) and will have to pass the first layer of perforated plate and then it will pass the 150 mm of air and then again find the other perforated plate and then it will dissipate throw the atmostphere.

The study will be performed as external with heat condution and radiation.

Many thanks in advance for the help.

Best Regards,

Re: Simulation of Double Perforated Plate

Jared Conway Jun 28, 2014 6:18 PM (in response to Nuno Moita)

some markups on the drawing would be helpful but hopefully this will answer your question. your options for perforated panels are:
1. model the holes
2. user a perforated panel
3. porous medium

option 1 has a long solve times and you need to make sure you capture the behavior
option 2 only works for internal analyses and putting the perf panels on inlets or outlets
option 3 is the best well rounded option. if you don't have the perf panel properties, you'll need to come up with them yourself. http://www.hawkridgesys.com/blog/flow-simulation-2013-parametric-studies/
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- Re: Simulation of Double Perforated Plate
  
  Nuno Moita Jun 29, 2014 1:54 PM (in response to Jared Conway)
  
  Thank you Jared.
  
  The 1st option already excluded. Even designing it solidworks will be very slow, meshing it, "impossible" to run.
  The 2nd option, a good idea if only one perforated plate.
  The 3rd option, I do agree, the best. But I do not have perforated panel properties needed to fill in Flow Simulation. To do that, can I just set, for example a small portion of the perforated plate? for example 20 cm x 20 cm of my perforated plate instead of a 900 cm x 900 cm (the real one)? To obtain the pressure drop vs flow rate. To simplify the mesh, with 900cm x 900 cm will be quite impossible.
  
  Many thanks.
  
  Regards.
  
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  - Re: Simulation of Double Perforated Plate
    
    Jared Conway Jun 29, 2014 4:55 PM (in response to Nuno Moita)
    
    you've got it
    
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