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December 4, 2016, 07:20 |
Negative Room Pressure
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#1 |
New Member
Angel
Join Date: Dec 2016
Posts: 2
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Hi, I'm a student and in my Master’s degree final project i have to simulate a Negative Room Pressure.
In this case, I have 2 rooms: - An anteroom, where I have to get -2.5 Pa - The patient room --> -5 Pa Both rooms are conected by a gap around the door. Both rooms have air difussers (with a ventilation system that removes more exhaust air from the room than air is allowed into the room) and gaps around other doors and windows (boundary condition = pressure inlet 0). The main problem is that i never get a convergence. I tried to separated the room in three bodies: - Anteroom - Patient Room - Gap door. I made a structured mesh in this body, because i thought the problems were here, but them remain. So I have no idea what is wrong. I simulate with standard k-e, althought I have tried other methods. I wonder if the problem is that is no possible to maintain in contact two different pressure, or something like that. On this aspect, I would like to ask for your help. |
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December 4, 2016, 09:16 |
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#2 | |
Member
Quang Le Dang
Join Date: Jun 2012
Posts: 61
Rep Power: 14 |
Quote:
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December 4, 2016, 11:14 |
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#3 |
New Member
Angel
Join Date: Dec 2016
Posts: 2
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When i said negative pressure, i referred to gauge pressure, sorry.
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December 5, 2016, 09:26 |
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#4 |
Member
Quang Le Dang
Join Date: Jun 2012
Posts: 61
Rep Power: 14 |
So, do you use gauge pressure for simulation? Because in simulation, I always use absolute pressure. Also, check operating condition pressure. And let me know your simulation in details (Boundary condition, mesh, etc).
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Tags |
convergence, divergence, negative pressure, room |
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