CFD Online Logo CFD Online URL
Home > Forums > Software User Forums > ANSYS > FLUENT

2d axisymmetric fluent transient simulation problem

Register Blogs Members List Search Today's Posts Mark Forums Read

LinkBack Thread Tools Search this Thread Display Modes
Old   August 3, 2017, 09:00
Exclamation 2d axisymmetric fluent transient simulation problem
New Member
ken zheng
Join Date: Aug 2017
Posts: 1
Rep Power: 0
zhengxf84 is on a distinguished road
Dear friends

I am currently trying to simulate a compressor tank releasing compressed air into a room with an opening over 1.5 seconds. I need to monitor the pressure in the compressor tank, the room pressure as well as the mass flow rate of the airflow coming out of the compressor tank.

I built 2D axisymmetric model to reduce the computation time. I patched initial pressure to the tank as 554600 Pascal (300K temperature) and set the operating pressure as atmosphere 101325 Pa. Time step is 0.0001 s, with 15000 time steps.

The problem I have encountered is the tank pressure stablised approximately at 552000 Pascal and not wanting to go down any more. Apparently, that is not right.

Using the same setting in 3D simulation and 2D symmetrical simulation, the pressure was fine. It only happened when I use axisymmetric model. I have never used axisymmetric before, and I am wondering if it is because I set it up incorrectly.

Your thoughts and suggestions would be much appreciated.

zhengxf84 is offline   Reply With Quote


axisymmetric 2d fluent, compressible air, transient

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

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 Off
Trackbacks are Off
Pingbacks are On
Refbacks are On

Similar Threads
Thread Thread Starter Forum Replies Last Post
Transient simulation in Fluent khaham FLUENT 13 March 15, 2016 08:18
Question on transient simulation in OpenFOAM and FLUENT nicklj OpenFOAM Running, Solving & CFD 4 May 8, 2014 22:30
The fluent stopped and errors with "Emergency: received SIGHUP signal" yuyuxuan FLUENT 0 December 3, 2013 22:56
Problem in using parallel process in fluent 14 Tleja FLUENT 3 September 13, 2013 10:54
transient simulation: natural convection problem? Basics CFX 3 September 25, 2002 09:42

All times are GMT -4. The time now is 17:43.