Problem with opening and closing door

[Bojan]

Hello,

I am trying to produce a door in wall which should open after 5 seconds after the start of simulation, and close again after another 5 seconds. The purpose is to simulate the opening and closing of a door by people, and letting the smoke in.

This problem should be easy, and I just used the code from the User Guide:

&HOLE XB=0.4,1.4,-5.4,-5.6,3.2,5.2, COLOR='RED', DEVC_ID='timer1' /

&HOLE XB=0.4,1.4,-5.4,-5.6,3.2,5.2, COLOR='GREEN', DEVC_ID='timer2' /

&DEVC XYZ=1,-5.6,3.8, ID='timer1', SETPOINT=5., QUANTITY='TIME', INITIAL_STATE=.FALSE. /

&DEVC XYZ=1,-5.6,3.8, ID='timer2', SETPOINT=10., QUANTITY='TIME', INITIAL_STATE=.TRUE. /

However, my door opens after 5 seconds and never closes again. Anybody has idea, what could be wrong?

[Kevin]

Is this taken from the User's Guide exactly? Can you tell me the page and section number? I don't think you can do what you want with two HOLEs.

[dr_jfloyd]

Having two holes over the same location is providing FDS conflicting instructions. FDS can't simultaneously have the first hole closed from T=0 to 5 and the second hole open from T=0 to 5.  

See the activate_vents test case on how to use a control function with a ramp to cycle the status.

On Thursday, June 23, 2016 at 8:28:34 AM UTC-4, Bojan wrote:

[Bojan]

The code is found at page 189, Section 15.4.1 and is copied exactly.

"This red block is actually a HOLE whose initial state is .FALSE., i.e., the hole is filled. Also at the start of the simulation, there is a pink obstruction that is visible. At 1 s the red block disappears. At 2 s the empty hole in the purple obstruction is filled with a green block."

[dr_jfloyd]

The code is not copied exactly.  There are no identical XB values amongst the &HOLE statements.  All the HOLE statements in that example have different XB that do not overlap.

[Bojan]

Yes, you are right, I though it would not be a problem. I guess than it is not possible to make the opening/closing door using &HOLE and &DEVC functions.

[Kevin McGrattan]

Use a CUSTOM control function, Section 15.5.5.

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[dr_jfloyd]

See the activate_vents example file.

[Bojan]

Thanks, will try.

[Bojan]

Do you maybe know how long the regular wooden door can last in fire conditions? Which temperature is high enough? I am looking for this information on the web, but so far I found only tests with fire doors, but I interested in them right now.