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Stuck in "prepare modeling" for very long

Question asked by Pradip Aryal on Oct 29, 2014
Latest reply on Nov 4, 2014 by Jared Conway

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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.
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Jared Conway Oct 29, 2014 3:20 PM

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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Pradip Aryal @ Jared Conway on Oct 29, 2014 4:11 PM

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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Jared Conway @ Pradip Aryal on Nov 4, 2014 9:44 AM

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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Jared Conway Oct 29, 2014 3:20 PM
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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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- Pradip Aryal @ Jared Conway on Oct 29, 2014 4:11 PM
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  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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  - Jared Conway @ Pradip Aryal on Nov 4, 2014 9:44 AM
    Mark Correct
    Correct Answer
    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
    Like • Show 0 Likes0
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Stuck in "prepare modeling" for very long

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