# pressure outlet condition setup

 User Name Remember Me Password
 Register Blogs Members List Search Today's Posts Mark Forums Read

 March 15, 2013, 23:35 pressure outlet condition setup #1 New Member   Siyang Hu Join Date: Mar 2013 Posts: 1 Rep Power: 0 Hi, I am a beginner for Fluent simulation, I confused when I deal with the outlet condition. Recently, I am simulating a buoyancy flow heated on the on the ground level, and then move upwards in a virtical chimney with Boussinesq model. Following the Flunet mannul, I have used the pressure boundary conditions in both of the inlet and outlet. In my physical model, the inlet static pressure is equal to the ambient pressure at the ground level (namely, 1 atm), while outlet static pressure is also equal to the value of the ambient at the same altitude (~0.97 atm in 195m-height). As the operating pressure is set to 1atm in the Define/operating condition, I set the gauage pressure at inlet to 0 Pa, and the outlet gauge pressure to -2340 pa, respectively. However, the virtical max velocity outcome under this conditions is unreasonably high (44m/s in simulation V.S. 15 m/s in a real experiment) So, my Question is: given the chimney is 195 meters high, how to set the gauge pressure at the outlet? Should I take consideration with the pressure gradient due to the gravity? Thx in advance. Ray

 Tags pressure outlet

 Thread Tools Display Modes Linear Mode

 Posting Rules You may not post new threads You may not post replies You may not post attachments You may not edit your posts BB code is On Smilies are On [IMG] code is On HTML code is OffTrackbacks are On Pingbacks are On Refbacks are On Forum Rules

 Similar Threads Thread Thread Starter Forum Replies Last Post Eric CFX 7 May 23, 2014 08:13 Lilly FLUENT 4 May 8, 2013 09:57 liladhar STAR-CCM+ 6 May 12, 2012 05:09 a.lynchy FLUENT 3 March 23, 2012 14:45 David FLUENT 3 March 19, 2004 05:40

All times are GMT -4. The time now is 07:27.

 Contact Us - CFD Online - Top