3 Replies Latest reply on Nov 4, 2014 9:44 AM by Jared Conway

Stuck in "prepare modeling" for very long

Pradip Aryal Oct 29, 2014 1:59 AM

I am trying to analyze flow simulation and comfort parameters in a relatively bigger classroom (40*30*3 m^3) with 30 central diffuser as an air-conditioning inlet, many heating (surface source) component such as PCs and ceiling lights and students themselves. However, every time I run the simulation it stuck in prepare modelling. It has been stuck for more than 4 hours and I terminated it. My laptop has I7 processor with 8gb of RAM. Is the computer capacity not enough. In order to get preliminary result, I haven't considered several effect such as mesh refinement, heat conduction in solid and radiation. What seem to be the problem here?
Please suggest.
Regards

Re: Stuck in "prepare modeling" for very long

Jared Conway Oct 29, 2014 3:20 PM (in response to Pradip Aryal)

sounds like your model needs a check

here is a good start SolidWorks Quick Tip - 4 Things to Do Before Every Flow Simulation Analysis

i would also recommend starting simpler. start with just the room. then add some components...etc
This will also help you identify which components are causing you issues
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- Re: Stuck in "prepare modeling" for very long
  
  Pradip Aryal Oct 29, 2014 4:11 PM (in response to Jared Conway)
  
  Thank you Jared, really appreciated your reply,
  Suppose we have 10 identical component (let's say humans) inside the model. And all of them as a heat source are generating 120W (Surface source). While defining boundary conditions, Can I select all of them together at once? (If yes, should it be 120 W or 120*10W). Or do I have to define boundary conditions (120W) separately one by one. My problem is basically like that, When I defined combinedly (only 120W), the simulation runs but I find surface temperature very low and then I defined all of them one by one and it just doesn't iterate.
  Above mentioned is just an example, I have several identical component as heat source inside model and defining boundary condition one by one is very time consuming.
  Regards,
  
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  - Re: Stuck in "prepare modeling" for very long
    
    Jared Conway Nov 4, 2014 9:44 AM (in response to Pradip Aryal)
    
    flow simulation considers the value total
    it is divided among all the entities relative to their % volume
    so you need to put in 120*10 if they are 10 each
    this should not affect the "prepare modeling" issue
    
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